CN105337149B - A kind of impulse type narrow cable and wide optical fiber laser based on the modulation of graphene micro optical fiber ring - Google Patents
A kind of impulse type narrow cable and wide optical fiber laser based on the modulation of graphene micro optical fiber ring Download PDFInfo
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- CN105337149B CN105337149B CN201510926127.0A CN201510926127A CN105337149B CN 105337149 B CN105337149 B CN 105337149B CN 201510926127 A CN201510926127 A CN 201510926127A CN 105337149 B CN105337149 B CN 105337149B
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- optical fiber
- graphene
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- modulation
- fiber ring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/06791—Fibre ring lasers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/02—Constructional details
- H01S3/03—Constructional details of gas laser discharge tubes
- H01S3/038—Electrodes, e.g. special shape, configuration or composition
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/02—Constructional details
- H01S3/03—Constructional details of gas laser discharge tubes
- H01S3/038—Electrodes, e.g. special shape, configuration or composition
- H01S3/0388—Compositions, materials or coatings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
- H01S3/0675—Resonators including a grating structure, e.g. distributed Bragg reflectors [DBR] or distributed feedback [DFB] fibre lasers
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Abstract
The present invention relates to optical engineering, material engineering and optical fiber optical technical field, and in particular to a kind of impulse type narrow cable and wide optical fiber laser based on the modulation of graphene micro optical fiber ring.Its architectural feature is：Micro optical fiber ring shape resonator and gain-type distributed-feedback Prague the fiber grating cascade for being drawn and being linked by the single-mode fiber of 980 nano wavebands form, and a part for micro optical fiber ring resonator is covered using graphene film, and the both sides covering metal electrode on graphene film, whole micro optical fiber ring resonator are fixed in a silicon dioxide substrates.For the present invention by conventional 980 wave band continuous light source pumpings, it is both narrow linewidth that can produce, and is the laser output of adjustable pulse again；Also there is extremely strong practicality, its frequency domain line width is 2~3k hertz, and maximum modulation speed is 10G hertz, and signal to noise ratio is 20 decibels, widely can be directly used in the sensing and communication system of all -fiber.
Description
Technical field
The present invention relates to optical engineering, material engineering and optical fiber optical technical field, and in particular to optical-fiber laser, modulation and
Sensing technology.
Background technology
Pulse laser all has important wide in scientific research and industrial production as a kind of important optics
General application, such as higher source luminance, optical signal occurring source, it is cut by laser knife, modulation /demodulation element etc..With economic and science and technology
Development, people propose higher and higher demand to pulse laser, such as：Ultrafast, high-power, high speed tunable, optics pass
Sense etc..
Particularly in long range light sensing field, it is desirable to which the pulse laser as light source had both had adjustable pulse special
Property, there is narrow linewidth characteristic again, moreover it is possible to export high-peak power, in theory and be all huge challenge in practice.
Currently, pulse laser is generally divided into three classes in operation principle, i.e.,：Mode-locked laser device, adjusting Q pulse laser
Device and external modulation type pulse laser.Simple locked mode, tune Q and external modulation type pulse laser can not all meet filter with low insertion loss, height
The rigors of the adjustable narrow linewidth pulse light output of speed.Specifically, mode-locked laser and Q-switched laser be typically difficult into
Row repetition and the regulation and control of pulsewidth, and the output of narrow linewidth can not be realized from principle.External modulation type pulse laser is limited by outer
Modulator, insertion loss is higher, and modulation rate is low (megahertz level).
In addition, traditional pulse laser is limited by material, technique and cost, more using semiconductor structure.However,
Semiconductor pulse laser is there is also many restrictions, it is difficult to export a wide range of tunable, the pulse of high-peak power.
This problem that develops into of optical fiber laser provides new solution.Laser device based on all -fiber has
Low cost, low-loss, easily access, can expand and can networking unique advantage, bigger power can be exported, higher bandwidth and more
Pure pattern, more and more important role is play in Modern optical communication and light sensing.Locked mode based on all -fiber, adjust Q and
Modulation type pulse laser is also constantly invented and improved in recent years.Even so, using optical fiber structure, while pulse is taken into account
Characteristic and narrow linewidth characteristic, there is also difficulty, generally requires multiple devices such as optical fiber laser, fiber optic modulator, optical fiber filter
The combination of part, thus increase the complexity and cost of system.
The content of the invention
Problem or deficiency be present for above-mentioned, can not be in same device in order to solve traditional narrow cable and wide optical fiber laser
In the problem of realizing high speed adjustable pulse light output, the invention provides a kind of pulse based on the modulation of graphene micro optical fiber ring
Type narrow cable and wide optical fiber laser.
Its architectural feature is：The micro optical fiber ring shape resonator of simultaneously looper knot is drawn by the single-mode fiber of 980 nano wavebands
(MFR) formed with gain-type distributed-feedback Prague fiber grating (DFB) by coupler cascade；It is remote in low-light fibre annular-type cavity
Zone position is coupled, the rectangle graphene film of 1 millimeter of a slice width degree is covered, is then not covered with low-light in graphene film
Growth a pair of electrodes on the upside of the both ends of fibre annular-type cavity.So that the micro optical fiber ring is positioned in silicon dioxide substrates, and pass through model
De Huali, which is fixed, to be close to.
Its design parameter is：1 micron of micro optical fiber diameter, 1~2 centimetre of length, 0.5 millimeter of micro optical fiber ring diameter, micro optical fiber
Ring knotting coupled region length is 5~6 microns, and graphene film is the single-layer graphene of the mm wide of 0.38 nanometer thickness 1.Graphene
Electrode material on film is gold, for applying ± 20 volts of modulation voltage.Silicon dioxide substrates area is 1 square centimeter,
Thickness is 3 millimeters.Used gain-type distributed feedback bragg grating, it is scribed in the double-doped single-mode fiber fibre core of erbium ytterbium,
Core diameter is 6 microns, and grating length is 2 centimetres.
The impulse type narrow cable and wide optical fiber laser based on the modulation of graphene micro optical fiber ring, it is characterised in that：With 980 nanometers
Wave band of laser is as pump light source, and it exports the narrow linewidth adjustable pulse for 1550~1560 nano wavebands, and lasing efficiency is
0.5%~1%, output signal is the adjustable pulse of 1550~1560 nano wavebands, and its frequency domain line width is 2~3k hertz, maximum
Modulating speed is 10G hertz, and signal to noise ratio is 20 decibels.
In the invention, single-layer graphene plays an important role, to complete the chopping of the pumping to injecting gain media
Modulation.Single-layer graphene, thickness 0.38nm, it is that the surface area/volume ratio reported at present is maximum as a kind of two-dimensional material
Thin-film material, there are unique physicochemical properties, wherein it is one of most typical for the photoelectricity based on fermi level it is tunable
Effect, the carrier concentration of graphene is adjusted by applied voltage, can significantly adjust its optical transmission loss, and then in specific band
The entirety of micro optical fiber ring in the regulation present invention, and then form time domain impulse.In addition, in the invention, gain-type distributed feed-back
Bragg grating while generating element and narrow linewidth filter part as laser, in swashing for reflection end output narrow linewidth
Light.Pulse pump by graphene modulation encourages, and its output is also pulse.
The present invention the course of work be：By the single-mode fiber of 980 nano wavebands, 980 nanometers of continuous optical pumpings are injected
For in fiber annular resonant cavity, and interference is formed, and interference cancellation point (Resonant Dip) is located at 980 nanometers.Meanwhile
The modulation voltage changed by the electrode access period on graphene, to adjust the optical attenuation of graphene overlay area.Work as graphite
When the decay of alkene overlay area is strong, optical signal is more difficult to be coupled into ring resonator, is mutually slackened so as to show as strong output i.e. interference,
When the decay of graphene overlay area is weak, ring resonator has high Q characteristic, and optical signal is more retained in ring resonator
It is interior, interfere cancellation strong so as to show as weak output.In output end, that is, form the pulse pump by electrical modulation.This pumping is injected
In gain-type distributed-feedback Prague fiber grating, the laser of 1550 nano wavebands is produced, and is exported by reflection end.This laser
Time domain specification is consistent with pumping, for the pulse laser modulated based on graphene.Meanwhile distributed-feedback Prague fiber grating is in itself
With narrow linewidth filtering characteristic, so the pulse laser of output also has the characteristic of narrow linewidth.
In summary, the present invention have low cost, low-loss, small volume, it is simple and compact for structure and make it is simple the characteristics of,
Convenient application；By conventional 980 wave band continuous light source pumpings, it is both narrow linewidth that can produce, and is that the laser of adjustable pulse is defeated again
Go out；Also there is extremely strong practicality, its frequency domain line width is 2~3k hertz, and maximum modulation speed is 10G hertz, signal to noise ratio 20
Decibel, widely can be directly used in the sensing and communication system of all -fiber.
Brief description of the drawings
Fig. 1 is the three dimensional structure diagram of the present invention；
Fig. 2 is the micrograph of the graphene covering micro optical fiber ring structure of the present invention；
Fig. 3 be the present invention be embodiment system diagram；
Fig. 4 is the modulation result schematic diagram using the present invention；
Reference：The ring resonator that the knotting of 1- micro-nano fibers is formed, 2- single-layer graphene films, 3- gold electrodes, 4-
980 nano waveband single-mode fibers, 5-1550 nano waveband single-mode fibers, 6- distributed-feedback Prague fiber gratings, 7- titanium dioxides
Silicon chip, the continuous optical pumping of 8-980 nanometers, 9- wave division multiplex couplers.
Embodiment
Below in conjunction with the drawings and the specific embodiments, the invention will be further described.
With reference to shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, the single-mode fiber of 980 nano wavebands is prepared by fused biconical taper method
For 1 micron of micro optical fiber of diameter, 2 centimetres of length, and Knot annulars, the micro optical fiber ring diameter 0.5 are knotted into by probe traction
Millimeter, micro optical fiber ring knotting coupled region length are 5 microns.The micro optical fiber ring is placed in silicon dioxide substrates, and passed through
Van der Waals force, which is fixed, to be close to.In low-light fibre annular-type cavity away from coupling zone position, pass through CVD method and wet method transfer techniques, covering
0.38 nanometer of a layer thickness, the single-layer graphene film that 1 millimeter of width.Then, by magnetron sputtering technique, in graphene film
It is not covered with a pair of gold electrodes of growth on the upside of the both ends of micro optical fiber ring.1 millimeter * 0.5 millimeter of gold electrode area coverage, electrode are thick
130 nanometers of degree.The output end of micro optical fiber ring resonator is coupled in 3 decibels of wave division multiplex couplers, wavelength-division multiplex
Another termination gain-type distributed-feedback Prague fiber grating of coupler, the distributed-feedback Prague fiber grating are scribed at erbium ytterbium
In double-doped single-mode fiber fibre core, core diameter is 6 microns, and grating length is 2 centimetres.
During laser work, the continuous optical pumping of 980 nano wavebands is injected by the input of ring resonator, simultaneously
Apply ± 20 volts of modulation voltage of fast modulation on gold electrode.In ring resonator output end, that is, export by fast velocity modulation
The pulse pump of system.In gain-type distributed-feedback Prague fiber grating, by pumping pumping, swashing for 1550 nano wavebands is produced
Light, and exporting backward, and be separated into by wave division multiplex coupler 1550 pure nano wavebands by modulation pulse laser.This swashs
Narrow linewidth characteristic is presented due to the filtering characteristic of distributed-feedback Prague fiber grating in light.
Above-mentioned specific implementation method is used for illustrating apparatus of the present invention, rather than limits the invention, in this hair
In bright spirit and the protection domain of claims, any change to the present invention both falls within the protection of the present invention with changing
Scope.
Claims (3)
1. a kind of impulse type narrow cable and wide optical fiber laser based on the modulation of graphene micro optical fiber ring, its architectural feature are：Received by 980
The single-mode fiber of VHF band is drawn and the micro optical fiber ring shape resonator MFR and gain-type distributed-feedback Prague optical fiber light of looper knot
Grid DFB is formed by coupler cascade；In micro optical fiber ring resonator away from coupling zone position, the stone of one layer of 1 mm wide of covering
Black alkene film, then it is not covered with growing a pair of electrodes on the upside of the both ends of low-light fibre annular-type cavity in graphene film so that should
Micro optical fiber ring resonator is positioned in silicon dioxide substrates, and is fixed and be close to by Van der Waals force, and graphene film is
The individual layer rectangle graphene of 0.38 nanometer thickness.
2. the impulse type narrow cable and wide optical fiber laser as claimed in claim 1 based on the modulation of graphene micro optical fiber ring, its feature exist
In：1 micron of the micro optical fiber diameter, 1~2 centimetre of length, 0.5 millimeter of micro optical fiber ring diameter, micro optical fiber ring knotting coupling regime
Length is 5~6 microns；Electrode material on the graphene film is gold, for applying ± 20 volts of modulation voltage；It is described
Silicon dioxide substrates area is 1 square centimeter, and thickness is 3 millimeters；Used gain-type distributed feedback bragg grating, inscribe
In the double-doped single-mode fiber fibre core of erbium ytterbium, core diameter is 6 microns, and grating length is 2 centimetres.
3. the impulse type narrow cable and wide optical fiber laser as claimed in claim 1 or 2 based on the modulation of graphene micro optical fiber ring, its work
It is as process：
By the single-mode fiber of 980 nano wavebands, 980 nanometers of continuous optical pumpings are injected in fiber annular resonant cavity, and shape
Into interference, and interference cancellation point Resonant Dip are made to be located at 980 nanometers；Meanwhile week is accessed by the electrode on graphene
The modulation voltage of phase change, to adjust the optical attenuation of graphene overlay area；
When the decay of graphene overlay area is strong, optical signal is more difficult to be coupled into ring resonator, so as to show as strong output i.e.
Interference mutually slackens, and when the decay of graphene overlay area is weak, ring resonator has high Q characteristic, and optical signal is more retained in
Annular resonance intracavitary, interfere cancellation strong so as to show as weak output；In output end, that is, form the pulse pump by electrical modulation；
In this pumping injection gain-type distributed-feedback Prague fiber grating, the laser of 1550 nano wavebands is produced, and pass through reflection end
Output.
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| CN201510926127.0A CN105337149B (en) | 2015-12-14 | 2015-12-14 | A kind of impulse type narrow cable and wide optical fiber laser based on the modulation of graphene micro optical fiber ring |
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| CN105337149B true CN105337149B (en) | 2018-04-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| RU221482U1 (en) * | 2022-12-13 | 2023-11-08 | федеральное государственное бюджетное образовательное учреждение высшего образования "Ульяновский государственный университет" | Fiber laser generator of an ultrashort pulse sequence with a high repetition rate based on a micronodal resonator |
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| CN106785861A (en) * | 2017-03-01 | 2017-05-31 | 太原理工大学 | Gao Zhongying ultra-short pulse generation method and device based on Graphene microcavity locked mode |
| CN109193326B (en) * | 2018-09-27 | 2021-03-30 | 电子科技大学 | Optical fiber microsphere cavity mode-locked laser based on graphene channel structure |
| CN111916981B (en) * | 2020-06-12 | 2022-09-09 | 南京大学深圳研究院 | Two-dimensional material integrated structure mode-locked fiber laser and construction method thereof |
| KR102308705B1 (en) | 2020-10-29 | 2021-10-05 | 한국과학기술연구원 | System for generating passive-mode-locked pulse laser at high repetition rate |
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