CN108988115A - Infrared pulsed lasers and laser output method in the novel equivalent two waveband of same threshold value - Google Patents

Abstract

The invention discloses infrared pulsed lasers and laser output methods in a kind of novel same equivalent two waveband of threshold value, it is related to middle near-infrared laser technical field, the present invention includes the 1150nmLD pumping source being sequentially arranged in the horizontal direction, first dichroic mirror, second dichroic mirror, first condenser lens, double clad mixes holmium fluoride gain fibre, first collimating mirror and gold-plated reflecting mirror, it further include the 1950nmLD pumping source being set to above the first dichroic mirror, the second condenser lens has been sequentially arranged between first collimating mirror and gold-plated reflecting mirror in the horizontal direction, antimony alkene two dimension saturable absorption material and the second collimating mirror, the present invention can be achieved with threshold value~output of 3 microns and~2.1 microns of dual-band continuous lasers, and by adjusting the power of 1150nmLD pumping source and 1950nmLD pumping source Accounting can be realized~3 microns of efficiency outputs such as synchronous with~2.1 microns of double-wavelength pulse laser, can be widely applied for the fields such as more material processing, medical operating.

Description

Infrared pulsed lasers and laser output method in the novel equivalent two waveband of same threshold value

Technical field

The present invention relates to middle near-infrared laser technical fields, more particularly to a kind of novel same equivalent two waveband of threshold value Middle infrared pulsed lasers and laser output method.

Background technique

With the continuous development of Fiber laser technology, middle infrared pulse optical fiber laser gradually causes lot of domestic and foreign The concern of person, potential application mainly have military defense, laser micro-hurt operation, middle infrared spectroscopy, infrared pumping in long wave Source etc..Since the commercial product of current high-power semiconductor laser is constantly mature, diode pumping source er-doped and the fluorine for mixing holmium Compound optical fiber laser is the outstanding person for realizing the mid-infrared laser pulse of high-energy high-peak power.By and large, there are two types of Mode can be used for realizing this pulse laser chain, be to adjust Q and mode locking mode respectively, wherein mode locked fiber laser can be realized The pulsed laser output of ultrashort high-peak power, passive mode-locking fiber laser has realized that generation flies in~3 micron wavebands at present Pulse laser of the high-peak power of second-time up to 37kW；However Q adjusting optical fiber laser can effectively realize higher energy Pulse laser output, in past many decades, a large amount of experiment generates~3 microns of tune Q optical-fiber lasers and mainly uses actively Q-switched Mode (such as: acousto-optic Q modulation, electric-optically Q-switched and mechanical tune Q) and it is passive Q-adjusted (such as: semiconductor saturable absorbing mirror, transmission-type gold Belong to the New Two Dimensionals materials such as doped crystal, graphene, topological insulator and black phosphorus), swash compared to solid actively Q-switched optical fiber Light mode, passive Q-adjusted optical fiber laser is at low cost, and structure is simple and consolidation, it is often more important that additional without being additionally added Power drive system adjusts Q to realize.

The metal that the rise of two-dimensional material novel at present is concentrated mainly on graphene, topological insulator and transmission-type is double Sulfide is expected to become a kind of novel electro-optical modulation device since they have excellent physicochemical property.Two dimension in 2004 Grapheme material is found for the first time, and be used to realize the Er-doped fiber pulse laser of~1.55 micron wavebands in 2009； 2013, Arizona State university Wei Chen et al. realize for the first time based on grapheme material~3 microns of er-doped fluoride Q impulses The output of laser leads to extremely low absorption efficiency since the modulated depth of this kind of material is lower, so that right and wrong are not often suitble to use In generation short pulse Q-switch laser.Hereafter, the materials such as metal double sulfide of topological insulator and transmission-type are used to~3 Micron er-doped/holmium fluoride fiber pulse laser, although topological insulator can have biggish modulation depth in broadband range, But its more complex preparation process is difficult to combine on two different elements；In addition, the double vulcanizations of the metal of broadband transmission-type Object makes energy level be suitable for middle infrared band, but its manufacturing process also phase due to that can be introduced into some defects in its material internal To complicated cumbersome.

In recent years, black phosphorus is concerned because it is with unique direct band gap layer, it is combined by pentels It forms and band gap adjustable extent is in~0.3eV to~2eV, this makes it be highly suitable for near-infrared or even mid-infrared light electric switch On, but during the experiment, black phosphorus is easily oxidized under ambient enviroment, is caused its performance degradation and is further increased and sky Water present in gas and oxygen carry out fuel factor reaction.Compared to the two-dimensional material of front, antimony alkene is as a kind of novel two-dimentional material Material has excellent characteristic, such as: higher stability, biggish carrying carrier ability, fabulous heat conductivity, strain Band gap conversion and wide band absorption etc. are induced, there is broadband saturable absorption characteristic just because of this kind of material, in addition~3 micron Band pulse energy can be efficiently absorbed in shallow-layer soft tissue, this is highly suitable for medical treatment without thermal damage's cutting tissue, together When~2.1 microns of pulse lasers can be good at playing hemoglutination in laser surgey；In addition, the same threshold in the processing of more materials It is worth equivalent~3 microns of pulses and~2.1 microns of pulses also functions to very important effect, therefore, in conjunction with novel antimony alkene two dimension Material realizes that with pulsed infrared laser output in the equivalent stable two waveband (~3 microns and~2.1 microns) of threshold value be a kind of new Technological means, infrared pulsed lasers play obvious action in many practical applications in this kind of two waveband.

As shown in figure 3, be a kind of er-doped ZBLAN optical fiber laser structure figure based on two-dimension nano materials graphene tune Q, It realizes the output of~3 micron waveband laser pulses by the way of passive Q-adjusted, wherein 976nm pump laser diode conduct Pumping source, pump light are coupled into er-doped ZBLAN gain fibre by collimation lens, dichroic mirror and condenser lens, then by graphene Fibre scope is directly connected to gain fibre tail portion, and final~3 microns of adjustable Q laser pulses are by close to 976nm pump laser diode Dichroic mirror export, and to output pulse laser filtering after detect.Graphene fibre scope is that graphene is deposited on optical fiber Effective saturable haustorium part is used as on mirror, to realize the formation of endovenous laser pulse, filter is for filtering out in output laser Remnant pump light, by change gain fibre length and pump light source power come realize under different conditions~3 microns Pulsed laser output, but this laser has the disadvantage in that

1, since the laser is to realize passive Q regulation pulse using two-dimension nano materials graphene as saturable absorber Output, the modulated depth of grapheme material is lower, therefore causes it lower to the absorption efficiency of pump light, thus cannot be effective The stable short pulse Q-switch laser of generation；

2, graphene is deposited on fibre scope, so that experimental implementation difficulty becomes larger, while directly by graphene fibre scope It is connected with gain fibre tail portion, the precision of experimental implementation is improved, is not easy to simple operations, and remaining pump energy Compared with beating on material for concentration, easily make material damage, substantially reduces~3 mum laser transfer efficiencies；

3, the laser can only realize the generation of~3 microns of Single wavelength laser pulses, can not obtain~2.1 microns simultaneously and swash Light, applicability are relatively narrow.

As shown in figure 4, be a kind of er-doped ZBLAN fiber pulse laser structure chart based on two-dimensional material black phosphorus tune Q, ~3 microns of passive Q-adjusted arteries and veins are realized as laser pumping source pumping er-doped ZBLAN gain fibre using 976nm semiconductor laser Impulse light output, wherein after pump laser diode passes through collimation focusing lens F1, be coupled into er-doped gain light through dichroic mirror F2 In fibre, gain fibre other end light is emitted to two total reflective mirrors M1, M2 and is adjusted to optical path, is finally injected into and is coated with two dimension The Jin Jingshang of material black phosphorus, and realize the modulation of pulse laser；Golden mirror coated with two-dimensional material black phosphorus is removed by liquid phase What method prepared, as reflection-type saturable absorbing mirror, er-doped gain fibre left side and coated with two-dimensional material black phosphorus Resonant cavity of the golden mirror as laser, the dichroic mirror close to 976nm pumping source passes through to guide the output of~3 mum lasers The watt level for changing 976nm pumping source obtains the output characteristics such as pulse different conditions waveform and the corresponding power of pulse, but this Kind laser has the disadvantage in that

1, since the laser is to realize passive Q regulation pulse output as saturable absorber based on two-dimensional material black phosphorus, Black phosphorus is prepared by liquid phase stripping method and is deposited on Jin Jingshang, and surface exposure easily occurs oxidation with oxygen in air and makees With causing its performance degradation, and further increase and react with water present in air and oxygen progress fuel factor, therefore cause It reduces the modulation capability of system, so that absorption efficiency is lower, is formed to be unfavorable for stablizing for Q impulse；

2, two-dimensional material black phosphorus is deposited on the surface Jin Jing, gold mirror easy to damage and the utilization again for being unfavorable for Jin Jing, and made It is standby at high cost, so that experimental assembly involves great expense；

3, the laser emitting wavelength of the laser is single, just no longer suitable for some applications for requiring multiwavelength laser to export With limiting the application potential of laser.

Since most of experiments at present realize that the wavelength of passive Q regulation pulse mid-infrared laser is main based on New Two Dimensional material In~3 microns and~3.5 microns, lack the synchronization threshold output of~3 microns and~2.1 microns dual wavelength continuous lasers, and Common two-dimensional material mainly has graphene, topological insulator and black phosphorus etc., but due to each own difference of these two-dimensional materials Physicochemical property defect and can not achieve steady in a long-term and wideband operation adjustable Q laser pulse.

Summary of the invention

It is an object of the invention to: it is existing based on infrared in New Two Dimensional material realization passive Q regulation pulse in order to solve The wavelength of laser mainly in~3 microns and~3.5 microns, lack~3 microns it is synchronous with~2.1 microns of dual wavelength continuous lasers The problem of threshold value exports, the present invention provide infrared pulsed lasers and laser output side in the novel same equivalent two waveband of threshold value of one kind Method.

The present invention specifically uses following technical scheme to achieve the goals above:

Infrared pulsed lasers in the novel equivalent two waveband of same threshold value, including the 1150nmLD being sequentially arranged in the horizontal direction Pumping source, the first dichroic mirror, the second dichroic mirror, the first condenser lens, double clad mix holmium fluoride gain fibre, the first collimating mirror With gold-plated reflecting mirror, it is characterised in that: it further include the 1950nmLD pumping source being set to above the first dichroic mirror, the described 1st Look mirror is obliquely installed with the second dichroic mirror,

Wherein, the 1150nmLD pumping source is for generating continuous pumping laser A；1950nmLD pumping source is for the company of generation Continuous pumping laser B；First dichroic mirror thoroughly, instead to continuous pumping laser B high, is used for continuous pumping continuous pumping laser A high Laser A and continuous pumping laser B carry out conjunction beam；Second dichroic mirror is saturating to continuous pumping laser A and continuous pumping laser B high, right ~3 microns and~2.1 mum lasers are high anti-, for will generate~3 microns and the guidance of~2.1 mum lasers export；Described One condenser lens is mixed in holmium fluoride gain fibre for continuous pumping laser A and continuous pumping laser B to be focused on double clad, And for generation~3 microns and~2.1 mum lasers collimate；Double clad mixes holmium fluoride gain fibre for producing Raw~3 microns and~2.1 mum lasers；First collimating mirror for pair~3 microns and~2.1 mum lasers collimate and incident Onto gold-plated reflecting mirror；Gold-plated reflecting mirror is right~3 microns high instead with~2.1 mum lasers, for providing the anti-of entire laser cavity Feedback；The double clad mixes the left side of holmium fluoride gain fibre and gold-plated reflecting mirror surrounds resonant cavity.

Further, to be sequentially arranged the second focusing in the horizontal direction between first collimating mirror and gold-plated reflecting mirror saturating Mirror, antimony alkene two dimension saturable absorption material and the second collimating mirror, second condenser lens for pair~3 microns and~2.1 micro- Meter Ji Guang is focused, and in lasing to antimony alkene two dimension saturable absorption material；Antimony alkene two dimension saturable absorption material is right~and it is 3 micro- Rice and~2.1 mum lasers carry out passive Q-adjusted；Second collimating mirror is right~and 3 microns and~2.1 mum lasers are collimated simultaneously again It is incident on gold-plated reflecting mirror.

Further, the antimony alkene two dimension saturable absorption material is prepared with liquid phase stripping method, and is deposited on CaF₂On base is low.

Further, it is 0 ° of angle, right end that the double clad, which mixes the left side angle with horizontal plane of holmium fluoride gain fibre, Face angle with horizontal plane is 8 ° of oblique angles, for preventing parasitic laser generation.

Further, the double clad mixes the energy level variations process in holmium fluoride gain fibre are as follows: continuous pumping laser A It will⁵I_8/2Part ground state particle on energy level is pumped into⁵I_6/2On energy level, ground state absorption process A is realized⁵I_8/2→⁵I_6/2, it is⁵I_6/2Energy Grade accumulation ground state particle, is realized⁵I_6/2Energy level with⁵I_7/2Population inversion between energy level, make from⁵I_6/2Particle transition on energy level It arrives⁵I_7/2Energy level generates~3 mum lasers；

Continuous pumping laser B will⁵I_8/2Part ground state particle on energy level is pumped into⁵I_7/2On energy level, ground state absorption mistake is realized Journey B⁵I_8/2→⁵I_7/2, it is⁵I_7/2Energy level additive ground state particle is realized⁵I_7/2Energy level with⁵I_8/2Population inversion between energy level, makes⁵I_7/2Particle on energy level transits to⁵I_8/2Energy level generates~2.1 mum lasers.

The laser output method of infrared pulsed lasers, includes the following steps: in the novel equivalent two waveband of same threshold value

S1: opening 1150nmLD pumping source and 1950nmLD pumping source, and 1150nmLD pumping source generates continuous pumping laser A, 1950nmLD pumping source generate continuous pumping laser B；

S2: continuous pumping laser A and continuous pumping laser B after the first dichroic mirror closes beam, passes through the second dichroic mirror and the One condenser lens is coupled into double clad and mixes holmium fluoride gain fibre, mixes in holmium fluoride gain fibre in double clad and continuously pumps Laser A make part ground state particle from⁵I_6/2Energy level is radiated⁵I_7/2Energy level generates~3 mum lasers, and continuous pumping laser B makes part Ground state particle from⁵I_7/2Energy level is radiated⁵I_8/2Energy level generates~2.1 mum lasers；

S3: respectively adjust 1150nmLD pumping source and 1950nmLD pumping source power, realize same threshold value~3 micron and~ The generation of 2.1 microns of dual wavelength continuous lasers；

S4: generation~3 microns and~2.1 microns of dual wavelength continuous lasers after the first collimating mirror collimation, be mapped to gold-plated On reflecting mirror, the output of holmium fluoride gain fibre left side is mixed by double clad after the reflection of gold-plated reflecting mirror, and poly- by first Focus lens collimation and the reflection guidance output of the second dichroic mirror.

Further, the second condenser lens, antimony alkene two dimension saturable absorption material and the second collimating mirror are placed in the first standard Between straight mirror and gold-plated reflecting mirror, antimony alkene two dimension saturable absorption material is adjusted at the focal length of the second condenser lens, is adjusted respectively The power for saving 1150nmLD pumping source and 1950nmLD pumping source generates same threshold value~3 micron and~2.1 microns of dual wavelengths in S3 When continuous laser, form relaxation oscillation process, then S4 generate~3 microns and~2.1 microns of dual wavelength continuous lasers are through the It, will~3 microns and~2.1 microns of dual wavelength continuous lasers focusing injection antimony alkene by the second condenser lens after one collimating mirror collimation Two-dimentional saturable absorption material, by antimony alkene two dimension saturable absorption material it is right~3 microns and~2.1 microns of dual wavelengths continuously swash Light is modulated, and is injected on gold-plated reflecting mirror through the second collimating mirror again after modulation, the high-peak power that realization pulsewidth narrows~3 The output of micron and~2.1 microns of double-wavelength pulse laser.

Further, it measures the power of~3 microns and~2.1 microns of pulse lasers respectively after the second dichroic mirror, and divides Not Ji Suan Slop efficiency, adjust the power accounting of 1150nmLD pumping source and 1950nmLD pumping source, realize~3 microns and~2.1 Micron double-wavelength pulse laser such as synchronizes at the efficiency output.

Beneficial effects of the present invention are as follows:

1, the present invention is by mixing holmium fluoride to double clad using the continuous laser pumping source of 1150nm and 1950nm wave band Gain fibre carry out the method for mixing pumping, it can be achieved that with threshold value~3 microns and~2.1 microns of dual-band continuous lasers it is defeated Out, effectively having evaded laser transition self termination phenomenon, method of the invention caused by~3 microns of transition saturated phenomenons can realize ~3 mum lasers efficiently export, and can reduce gain fibre Single wavelength output when high heat production the problem of.

2, the present invention prepares New Two Dimensional material antimony alkene by using liquid phase stripping method, and is deposited on CaF₂Substrate table Wheat flour is at transmission-type saturable absorption device, low manufacture cost, and easy to operate, greatly reduces experimental implementation difficulty, simultaneously Simplify system, and due to antimony alkene stability with higher, biggish carrying carrier ability, fabulous heat conductivity is answered Become the unique advantages such as the conversion of induction band gap and wide band absorption, is conducive to generate synchronous~3 microns and~2.1 microns of pulse lasers are same When export.

3, the present invention passes through the power accounting of regulation 1150nm and 1950nm pumping source, the easily output power of the efficiency such as realization Close~3 microns and~2.1 microns of passive Q regulation pulse laser outputs, while the stability based on New Two Dimensional antimony alkene material, The pulse laser of whole system output can stable work in a long time, laser of the invention process in more materials, is medical The fields such as operation can be widely applied.

Detailed description of the invention

Fig. 1 is overall structure diagram of the invention.

Fig. 2 is that double clad mixes the simplified energy diagram of holmium fluoride gain fibre.

Fig. 3 is a kind of er-doped ZBLAN optical fiber laser structure figure based on two-dimension nano materials graphene tune Q.

Fig. 4 is a kind of er-doped ZBLAN fiber pulse laser structure chart based on two-dimensional material black phosphorus tune Q.

Appended drawing reference: 1,1150nmLD pumping source；2,1950nmLD pumping source；3, the first dichroic mirror；4, the second dichroic mirror； 5, the first condenser lens；6, double clad mixes holmium fluoride gain fibre；7, the first collimating mirror；8, the second condenser lens；9, antimony alkene Two-dimentional saturable absorption material；10, the second collimating mirror；11, gold-plated reflecting mirror；12,⁵I_8/2Energy level；13,⁵I_7/2Energy level；14,⁵I_6/2 Energy level；15, ground state absorption process A；16, ground state absorption process B；17 ,~3 mum laser；18 ,~2.1 mum laser.

Specific embodiment

In order to which those skilled in the art better understand the present invention, with reference to the accompanying drawing with following embodiment to the present invention It is described in further detail.

Embodiment 1

As shown in Figure 1, the present embodiment provides infrared pulsed lasers in a kind of novel same equivalent two waveband of threshold value, including edge 1150nmLD pumping source 1 that horizontal direction is sequentially arranged, the first dichroic mirror 3, the second dichroic mirror 4, the first condenser lens 5, double-contracting Layer mixes holmium fluoride gain fibre 6, the first collimating mirror 7 and gold-plated reflecting mirror 8, further includes being set to 3 top of the first dichroic mirror 1950nmLD pumping source 2, first dichroic mirror 3 are obliquely installed with the second dichroic mirror 4, and specific tilt angle is according to practical feelings Depending on condition, the left side angle with horizontal plane that double clad mixes holmium fluoride gain fibre is 0 ° of angle, right side angle with horizontal plane For 8 ° of oblique angles,

Wherein, the 1150nmLD pumping source 1 is for generating continuous pumping laser A；1950nmLD pumping source 2 is for generating Continuous pumping laser B；First dichroic mirror 3 thoroughly, instead to continuous pumping laser B high, is used for continuous pump continuous pumping laser A high Pu laser A and continuous pumping laser B carry out conjunction beam；Second dichroic mirror 4 is saturating to continuous pumping laser A and continuous pumping laser B high, Right~3 microns and~2.1 mum lasers are high anti-, for will generate~3 microns and the guidance of~2.1 mum lasers export；It is described First condenser lens 5 mixes holmium fluoride gain fibre for continuous pumping laser A and continuous pumping laser B to be focused on double clad In 6, and for generation~3 microns and~2.1 mum lasers collimate；Double clad mixes holmium fluoride gain fibre 6 For generating~3 microns and~2.1 mum lasers；First collimating mirror 7 for pair~3 microns and~2.1 mum lasers carry out it is quasi- Direct join is incident on gold-plated reflecting mirror 11；Gold-plated reflecting mirror 11 is right~3 microns high instead with~2.1 mum lasers, sharp for providing The feedback of optical cavity；The double clad mixes the left side of holmium fluoride gain fibre 6 and gold-plated reflecting mirror surrounds resonant cavity.

The laser output method of infrared pulsed lasers, includes the following steps: in the novel equivalent two waveband of same threshold value

S1: opening 1150nmLD pumping source 1 and 1950nmLD pumping source 2, and 1150nmLD pumping source 1 generates continuous pumping and swashs Light A, 1950nmLD pumping source 2 generates continuous pumping laser B；

S2: continuous pumping laser A and continuous pumping laser B after the first dichroic mirror 3 closes beam, by the second dichroic mirror 4 and First condenser lens 5 is coupled into double clad and mixes holmium fluoride gain fibre 6, mixes in holmium fluoride gain fibre 6 and connects in double clad Continuous pumping laser A makes⁵I_6/2Particle radiation on energy level 14 arrives⁵I_7/2Energy level 13 generates~3 mum lasers 17, continuous pumping laser B Make⁵I_7/2Particle radiation on energy level 13 arrives⁵I_8/2Energy level 12 generates~2.1 mum lasers 18；

The double clad mixes the energy level variations process in holmium fluoride gain fibre 6 are as follows: continuous pumping laser A will⁵I_8/2Energy Part ground state particle in grade 12 is pumped into⁵I_6/2On energy level 14, ground state absorption process A15 is realized⁵I_8/2→⁵I_6/2, it is⁵I_6/2Energy Grade 14 accumulates ground state particle, realizes⁵I_6/2Energy level 14 with⁵I_7/2Population inversion between energy level 13, make from⁵I_6/2Grain on energy level 14 Son transits to⁵I_7/2Energy level 13 generates~3 mum lasers 17；

Continuous pumping laser B will⁵I_8/2Part ground state particle on energy level 12 is pumped into⁵I_7/2On energy level 13, realize that ground state is inhaled Receipts process B16⁵I_8/2→⁵I_7/2, it is⁵I_7/2Energy level 13 accumulates ground state particle, realizes⁵I_7/2Energy level 13 with⁵I_8/2Particle between energy level 12 Number reversion, makes⁵I_7/2Particle on energy level 13 transits to⁵I_8/2Energy level 12 generates~2.1 mum lasers 18；

S3: respectively adjust 1150nmLD pumping source 1 and 1950nmLD pumping source 2 power, realize same threshold value~3 micron and The generation of~2.1 microns of dual wavelength continuous lasers, specifically:

The appropriate power for adjusting 1150nmLD pumping source 1 and 1950nmLD pumping source 2 makes the power accounting point between them Not Man Zu:

1 power accounting of 1150nmLD pumping source are as follows: 35% < P₁₁₅₀/(P₁₁₅₀+P₁₉₅₀) < 50%；

2 power accounting of 1950nmLD pumping source are as follows: 50% < P₁₉₅₀/(P₁₁₅₀+P₁₉₅₀) < 75%；

S4: generation~3 microns and~2.1 microns of dual wavelength continuous lasers after the first collimating mirror 7 collimation, be mapped to gold-plated On reflecting mirror 11, the output of 6 left side of holmium fluoride gain fibre is mixed by double clad after the reflection of gold-plated reflecting mirror 11, and pass through the One condenser lens 5 collimation and the reflection guidance output of the second dichroic mirror 4.

Embodiment 2

The present embodiment advanced optimizes on the basis of embodiment 1, specifically:

The second condenser lens 8, antimony have been sequentially arranged between first collimating mirror 7 and gold-plated reflecting mirror 11 in the horizontal direction Alkene two dimension saturable absorption material 9 and the second collimating mirror 10, second condenser lens 8 for pair~3 microns and~2.1 microns Laser is focused, and in lasing to antimony alkene two dimension saturable absorption material 9；Antimony alkene two dimension saturable absorption material 9 is right~and it is 3 micro- Rice and~2.1 mum lasers carry out passive Q-adjusted；Second collimating mirror is 10 right~and 3 microns and~2.1 mum lasers collimate again And be incident on gold-plated reflecting mirror 11, the antimony alkene two dimension saturable absorption material is prepared with liquid phase stripping method, and is sunk Product is in CaF₂On base is low.

Second condenser lens 8, antimony alkene two dimension saturable absorption material 9 and the second collimating mirror 10 are placed in the first collimating mirror 7 Between gold-plated reflecting mirror 11, antimony alkene two dimension saturable absorption material 9 is adjusted at the focal length of the second condenser lens 8, is adjusted respectively The power for saving 1150nmLD pumping source 1 and 1950nmLD pumping source 2 makes their power accounting meet the condition in embodiment, When S3 generates same threshold value~3 micron and~2.1 microns of dual wavelength continuous lasers, relaxation oscillation process is formed, then S4 is generated ~3 microns and~2.1 microns of dual wavelength continuous lasers after the first collimating mirror 7 collimation, passing through the second condenser lens 8 will~3 Micron and~2.1 microns of dual wavelength continuous lasers focus and inject antimony alkene two dimension saturable absorption material 9, can be satisfied by antimony alkene two dimension With absorbing material 9 it is right~3 microns and~2.1 microns of dual wavelength continuous lasers are modulated, again through the second collimating mirror 10 after modulation It injects on gold-plated reflecting mirror 11, since the difference of signal strength or weakness can be by antimony alkene two dimension saturable absorption material in the relaxation process 9 are modulated, and when laser power is higher, which can effectively penetrate antimony alkene two dimension saturable absorption material 9, work as laser When power is lower, which will be absorbed by antimony alkene two dimension saturable absorption material 9, thus during laser generation The constantly circulation above process, the place that the place for keeping pulse laser light intensity strong constantly becomes strong, weak are constantly absorbed, and finally realize arteries and veins The high-peak power of width~output of 3 microns and~2.1 microns of double-wavelength pulse laser.

Embodiment 3

The present embodiment advanced optimizes on the basis of embodiment 2, specifically:

It measures the power of~3 microns and~2.1 microns of pulse lasers respectively after the second dichroic mirror 4, and calculates separately tiltedly Efficiency, the power accounting for adjusting 1150nmLD pumping source and 1950nmLD pumping source meets the condition in embodiment 1, and makes to calculate Difference between two obtained Slop efficiencies, which is floated, is lower than 2%, realizes the same of~3 microns and~2.1 microns double-wavelength pulse laser The output of the efficiency such as step.

The above, only presently preferred embodiments of the present invention, are not intended to limit the invention, patent protection model of the invention It encloses and is subject to claims, it is all to change with equivalent structure made by specification and accompanying drawing content of the invention, similarly It should be included within the scope of the present invention.

Claims (8)

1. infrared pulsed lasers in the novel equivalent two waveband of same threshold value, including the 1150nmLD pump being sequentially arranged in the horizontal direction Pu source (1), the first dichroic mirror (3), the second dichroic mirror (4), the first condenser lens (5), double clad mix holmium fluoride gain fibre (6), the first collimating mirror (7) and gold-plated reflecting mirror (11), it is characterised in that: further include being set to above the first dichroic mirror (3) 1950nmLD pumping source (2), first dichroic mirror (3) are obliquely installed with the second dichroic mirror (4),

Wherein, the 1150nmLD pumping source (1) is for generating continuous pumping laser A；1950nmLD pumping source (2) is for generating Continuous pumping laser B；First dichroic mirror (3) thoroughly, instead to continuous pumping laser B high, is used for continuous continuous pumping laser A high Pumping laser A and continuous pumping laser B carry out conjunction beam；Second dichroic mirror (4) is to continuous pumping laser A and continuous pumping laser B It is high thoroughly, it is right~3 microns and~2.1 mum lasers it is high anti-, for will generate~3 microns and the guidance of~2.1 mum lasers export； First condenser lens (5) is used to focus on continuous pumping laser A and continuous pumping laser B double clad and mixes the increasing of holmium fluoride In beneficial optical fiber (6), and for generation~3 microns and~2.1 mum lasers collimate；Double clad mixes the increasing of holmium fluoride Beneficial optical fiber (6) is for generating~3 microns and~2.1 mum lasers；First collimating mirror (7) for pair~3 microns and~2.1 microns Laser is collimated and is incident on gold-plated reflecting mirror (11)；Gold-plated reflecting mirror (11) is right~3 microns high with~2.1 mum lasers Instead, for providing the feedback of entire laser cavity；The double clad mix holmium fluoride gain fibre (6) left side and gold-plated reflection Mirror surrounds resonant cavity.

2. infrared pulsed lasers in the novel same equivalent two waveband of threshold value according to claim 1, it is characterised in that: described The second condenser lens (8), antimony alkene two dimension have been sequentially arranged between first collimating mirror (7) and gold-plated reflecting mirror (11) in the horizontal direction Saturable absorption material (9) and the second collimating mirror (10), second condenser lens (8) for pair~3 microns and~2.1 microns Laser is focused, and in lasing to antimony alkene two dimension saturable absorption material (9)；Antimony alkene two dimension saturable absorption material (9) is right ~3 microns passive Q-adjusted with the progress of~2.1 mum lasers；Second collimating mirror (10) is right~3 microns and~2.1 mum lasers again It is collimated and is incident on gold-plated reflecting mirror (11).

3. infrared pulsed lasers in the novel same equivalent two waveband of threshold value according to claim 2, it is characterised in that: described Antimony alkene two dimension saturable absorption material (9) is prepared with liquid phase stripping method, and is deposited on CaF₂On base is low.

4. infrared pulsed lasers in the novel same equivalent two waveband of threshold value according to claim 1-3, feature Be: the double clad mixes the left side of holmium fluoride gain fibre (6) and the angle of horizontal plane is 0 ° of angle, right side and level The angle in face is 8 ° of oblique angles.

5. infrared pulsed lasers in the novel same equivalent two waveband of threshold value according to claim 1, it is characterised in that: described Double clad mixes the energy level variations process in holmium fluoride gain fibre (6) are as follows: continuous pumping laser A will⁵I_8/2On energy level (12) Part ground state particle is pumped into⁵I_6/2On energy level (14), realize ground state absorption process A (15)⁵I_8/2→⁵I_6/2, it is⁵I_6/2Energy level (14) ground state particle is accumulated, is realized⁵I_6/2Energy level (14) with⁵I_7/2Population inversion between energy level (13), makes⁵I_6/2On energy level (14) Particle transit to⁵I_7/2Energy level (13) generates~3 mum lasers (17)；

Continuous pumping laser B will⁵I_8/2Part ground state particle on energy level (12) is pumped into⁵I_7/2On energy level (13), realize that ground state is inhaled Receipts process B (16)⁵I_8/2→⁵I_7/2, it is⁵I_7/2Energy level (13) accumulates ground state particle, realizes⁵I_7/2Energy level (13) with⁵I_8/2Energy level (12) Between population inversion, make from⁵I_7/2Particle on energy level (13) transits to⁵I_8/2Energy level (12) generates~2.1 mum lasers (18)。

6. the laser output method of infrared pulsed lasers in the novel equivalent two waveband of same threshold value, which is characterized in that including as follows Step:

S1: opening 1150nmLD pumping source (1) and 1950nmLD pumping source (2), and 1150nmLD pumping source (1) generates continuous pumping Laser A, 1950nmLD pumping source (2) generates continuous pumping laser B；

S2: continuous pumping laser A and continuous pumping laser B after the first dichroic mirror (3) close beam, by the second dichroic mirror (4) and First condenser lens (5) is coupled into double clad and mixes holmium fluoride gain fibre (6), mixes holmium fluoride gain fibre in double clad (6) continuous pumping laser A makes in⁵I_6/2Particle radiation on energy level (14) arrives⁵I_7/2Energy level (13) generates~3 mum lasers (17), Continuous pumping laser B makes⁵I_7/2Particle radiation on energy level (13) arrives⁵I_8/2Energy level (12) generates~2.1 mum lasers (18)；

S3: respectively adjust 1150nmLD pumping source (1) and 1950nmLD pumping source (2) power, realize same threshold value~3 micron with The generation of~2.1 microns of dual wavelength continuous lasers；

S4: generation~3 microns and~2.1 microns of dual wavelength continuous lasers after the first collimating mirror (7) collimation, be mapped to gold-plated anti- It penetrates on mirror (11), the output of holmium fluoride gain fibre (6) left side is mixed by double clad after gold-plated reflecting mirror (11) reflection, and lead to Cross the first condenser lens (5) collimation and the second dichroic mirror (4) reflection guidance output.

7. the laser output method of infrared pulsed lasers in the novel same equivalent two waveband of threshold value according to claim 6, It is characterized by: the second condenser lens (8), antimony alkene two dimension saturable absorption material (9) and the second collimating mirror (10) are placed in Between one collimating mirror (7) and gold-plated reflecting mirror (11), antimony alkene two dimension saturable absorption material (9) are adjusted in the second condenser lens (8) at focal length, respectively adjust 1150nmLD pumping source (1) and 1950nmLD pumping source (2) power, then S4 generation~ After the first collimating mirror (7) collimation, passing through the second condenser lens (8) will~3 for 3 microns and~2.1 microns of dual wavelength continuous lasers Micron and~2.1 microns of dual wavelength continuous lasers focus and inject antimony alkene two dimension saturable absorption material (9), can by antimony alkene two dimension Saturated absorption material (9) is right~and 3 microns and~2.1 microns of dual wavelength continuous lasers are modulated, again through the second collimation after modulation Mirror (10) is injected on gold-plated reflecting mirror (11), the high-peak power that realization pulsewidth narrows~3 microns and~2.1 microns of dual wavelengths The output of pulse laser.

8. the laser output method of infrared pulsed lasers in the novel same equivalent two waveband of threshold value according to claim 7, It is characterized by: measuring the power of~3 microns and~2.1 microns of pulse lasers respectively after the second dichroic mirror (4), and count respectively Calculate Slop efficiency, adjust 1150nmLD pumping source (1) and 1950nmLD pumping source (2) power accounting, realize~3 microns with~ 2.1 microns of double-wavelength pulse laser such as synchronizes at the efficiency output.