CN114336250B - Multi-beam laser source system, amplifying method using the same and multi-wavelength laser amplifier - Google Patents
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Abstract
A multi-beam laser source system, a method of amplifying using the same, and a multi-wavelength laser amplifier, the system comprising: the plurality of laser signal sources provide signal source laser beams with different wavelengths; the optical fiber coupler couples a plurality of light beams into the same optical fiber; the pump source provides a pump source laser beam with a pump source wavelength smaller than the signal source wavelength; the multi-wavelength laser amplifier includes: the optical fiber combiner is used for coupling the laser signal beam and the pumping source laser beam; the doped ion gain fiber is provided with a gain medium, the wavelength of a signal source falls in the radiation spectrum range of the gain medium, and the wavelength of a pumping source falls in the absorption spectrum range of the gain medium; the fiber coating power stripper filters out the energy of the residual pumping source laser beam after passing through the doped ion gain fiber and outputs a plurality of laser signal source beams after power amplification.
Description
Technical Field
The present invention relates to the field of laser technologies, and in particular, to a multi-beam laser source system, a multi-beam laser source amplifying method, and a multi-wavelength laser amplifier.
Background
The laser processing is widely used by the processing industry because it is suitable for various materials including metals, non-metals, high hardness, high brittleness, high melting point, and the like, and has high production efficiency.
However, in the traditional laser processing, single-frequency laser is adopted, if the processing is directly carried out on hard and brittle materials such as ceramics, silicon wafers and the like, a processed sample is easy to be damaged due to heat accumulation; in addition, the single-frequency laser is easy to have slag and has thicker precision on the cutting of the metal plate.
In recent years, dual-beam laser processing has been widely used for improving the quality of laser processing, preheating a processed object by using a long pulse band, and then performing instantaneous processing on the object by using a short pulse band to achieve minimum heat accumulation; compared with the traditional single-beam (single-wavelength) laser processing, especially the processing of ceramic hard and brittle sheets or precise metal plates, the double-beam laser can greatly reduce the breakage rate of hard and brittle materials and improve the precision of precise metal surface processing, thereby bringing more advanced application to commodity industry (such as 5G commodity industry).
The main principle of the double-beam laser processing is that a first long-pulse high-power pulse laser is utilized to heat a processed object to approach the processing threshold of the object, and a second low-power short-pulse laser is utilized to instantly strip the object so as to minimize the heat accumulation condition of a processing area; this is the greatest advantage of dual beam laser processing.
Two traditional double-beam laser generation modes are adopted, namely, two lasers with different wavelengths, different powers and different pulse widths are coupled on the same optical axis by utilizing a space coupling mode; one is to use a fiber amplifier to convert part of the power from one excitation source to another and to retain the remaining excitation source.
The deletions of the two known ways described above include: the spatial coupling loss is too large (more than 10%), the optical axis of the double beam is not closed, the aperture of the optical fiber becomes large to influence the quality of the beam, and therefore the maximum effect of the double beam laser processing cannot be exerted.
Furthermore, the known approaches are limited to dual beams only and are not suitable for more than dual beam processing applications, e.g. three beams or more.
Accordingly, how to develop a multi-beam laser source system, a multi-beam laser source amplifying method and a multi-wavelength laser amplifier, which can reduce the loss of laser transmission (less than 5%), solve the coaxial problem of multi-beam laser (100% adhesion), and greatly improve the quality of laser beams, and bring the multi-beam laser processing application into play very much, is a subject to be solved by those skilled in the art.
Disclosure of Invention
In one embodiment, the present invention provides a multi-beam laser source system, comprising:
the system comprises a plurality of laser signal sources, a plurality of optical fiber units and a plurality of optical fiber units, wherein each laser signal source provides a signal source laser beam, each signal source laser beam has a signal source wavelength, and the signal source wavelengths are different from each other;
the optical fiber coupler is used for coupling a plurality of signal source laser beams into the same optical fiber;
at least one pump source, each pump source is used for providing a pump source laser beam, the pump source laser beam has a pump source wavelength, and the pump source wavelength is smaller than the plurality of signal source wavelengths;
a multi-wavelength laser amplifier, comprising:
the optical fiber combiner is connected with the optical fiber and is used for coupling a plurality of signal source laser beams and pumping source laser beams;
the doped ion gain optical fiber is connected with the optical fiber combiner, the optical fiber combiner transmits a plurality of signal source laser beams and pump source laser beams into the doped ion gain optical fiber and amplifies the power of each signal source laser beam, the doped ion gain optical fiber is provided with a gain medium, the plurality of signal source wavelengths fall in the range of the radiation spectrum of the gain medium, and the pump source wavelengths fall in the range of the absorption spectrum of the gain medium; and
and the fiber coating power stripper is connected with the doped ion gain fiber and is used for filtering the energy of the residual pumping source laser beams passing through the doped ion gain fiber and outputting a plurality of signal source laser beams subjected to power amplification.
In one embodiment, the present invention provides a method for amplifying a multi-beam laser source, comprising the steps of:
(a) Coupling a plurality of source laser beams into an optical fiber by an optical fiber coupler;
(b) Coupling a plurality of signal source laser beams and pump source laser beams into the doped ion gain fiber by the fiber combiner, the plurality of signal source laser beams being transmitted in the core of the doped ion gain fiber and the pump source laser beams being transmitted in the jacket of the doped ion gain fiber;
(c) The pumping source laser beam firstly amplifies the signal source laser beam with the minimum wavelength, then the signal source laser beam with the sub-small wavelength is amplified by using part of the amplified signal source laser beam with the minimum wavelength, and the like until the power of all the signal source laser beams is amplified; and
(d) The energy of the residual pumping source laser beam passing through the doped ion gain fiber is filtered by a fiber coating power stripper, and a plurality of signal source laser beams after power amplification are output.
In one embodiment, the present invention provides a multi-wavelength laser amplifier, comprising:
the optical fiber combiner is connected with an optical fiber and is used for coupling a plurality of signal source laser beams and pumping source laser beams; each signal source laser beam has a signal source wavelength, and the signal source wavelengths are different from each other; the pump source laser beam has a pump source wavelength which is smaller than the plurality of signal source wavelengths;
the doped ion gain optical fiber is connected with the optical fiber combiner, the optical fiber combiner transmits a plurality of signal source laser beams and pump source laser beams into the doped ion gain optical fiber and synchronously amplifies the power of a plurality of signal source wavelengths, the doped ion gain optical fiber is provided with a gain medium, the plurality of signal source wavelengths fall in the range of the radiation spectrum of the gain medium, and the pump source wavelengths fall in the range of the absorption spectrum of the gain medium; and
and the fiber coating power stripper is connected with the doped ion gain fiber and is used for filtering the power of the residual pumping source laser beam passing through the doped ion gain fiber and outputting a plurality of signal source laser beams after power amplification.
Drawings
FIG. 1 is a system diagram of a multi-beam laser source system according to an embodiment of the present invention.
FIG. 2 is a schematic diagram of the laser signal source amplified by the pump source according to the present invention.
Fig. 3 is an ytterbium ion absorption emission spectrum.
Fig. 4A is an absorption spectrum of erbium ions in a frequency band.
Fig. 4B is an absorption emission spectrum of erbium ions in another frequency band.
Fig. 5 is a thulium ion absorption emission spectrum.
FIG. 6 is a system diagram of another embodiment of a multi-beam laser source system according to the present invention.
[ symbolic description ]
100 200 beam laser source system
1,2,6, S1, S2, S3 laser signal source
3 optical fiber coupler
4 optical fiber
5 pump source
10 Multi-wavelength laser amplifier
11 optical fiber connector
12 doped ion gain fiber
121 fiber core
122, fiber clothes
13, fiber coat power stripper
A1:ytterbium ion absorption Spectrum
A2 erbium ion absorption Spectrum
A4 Thulium ion absorption Spectrum
E1:ytterbium ion emission Spectrum
E2:erbium ion emission Spectrum
E4.thulium ion emission Spectrum
L1, L2, L4 signal source laser beam
L3 pumping source laser beam
LL1, LL2, LL4 amplified source laser beam
PW1, PW2, PW4 pulse width
W1, W2, W4 power
λ1, λ2, λ4 signal source wavelength
λ3 pump source wavelength
Detailed Description
Referring to fig. 1 and 2, a multi-beam laser source system 100 according to the present invention includes two laser signal sources 1,2, a Fiber coupler 3, a pump source 5, and a multi-wavelength laser amplifier (multi-wavelength laser amplifier) 10. The multi-wavelength laser amplifier 10 is composed of a Fiber combiner (Fiber) 11, a doped Ion gain Fiber (Ion-doped gain Fiber) 12, and a jacket power stripper (CPS) 13.
Each of the laser signal sources 1,2 may provide a signal source laser beam L1, L2, each of the signal source laser beams L1, L2 having a signal source wavelength, the signal source wavelengths of the signal source laser beams L1, L2 being different from each other. In addition, the power of the source laser beams L1, L2 provided by each of the laser sources 1,2 is different from each other, and the order of magnitude of the plurality of powers is opposite to the order of magnitude of the plurality of source wavelengths. And each of the signal source laser beams L1, L2 has a pulse width, the pulse widths are different from each other, and the order of the pulse widths is opposite to the order of the signal source wavelengths.
For example, the signal source laser beam L1 provided by the laser signal source 1 has a signal source wavelength λ1, a power W1 and a pulse width PW1, and the signal source laser beam L2 provided by the laser signal source 2 has a signal source wavelength λ2, a power W2 and a pulse width PW2; if λ1 < λ2, W1 > W2 and PW1 > PW2.
The optical fiber coupler 3 is used for coupling the signal source laser beams L1 and L2 into the same optical fiber 4; the type of the optical fiber coupler 3 is not limited, and may be, for example, a wavelength division multiplexer (Wavelength Division Multiplexing, WDM).
The pump source 5 is configured to provide a pump source laser beam L3, where the pump source laser beam L3 has a pump source wavelength that is less than each of the signal source wavelengths.
For example, the pump source wavelength is λ3, and if the signal source wavelength λ1 of the signal source laser beam L1 is smaller than the signal source wavelength λ2 of the signal source laser beam L2, λ3 is smaller than λ1 and smaller than λ2.
The optical fiber combiner 11 is connected to the optical fiber 4, and the optical fiber combiner 11 is used for coupling the signal source laser beams L1 and L2 and the pump source laser beam L3.
The ion-doped gain fiber 12 is connected to the fiber combiner 11, and the fiber combiner 11 transmits the source laser beams L1, L2 and the pump source laser beam L3 into the ion-doped gain fiber 12 and amplifies the power of each of the source laser beams L1, L2. The doped ion gain fiber 12 has a gain medium, the signal source wavelength λ1 of the signal source laser beam L1 and the signal source wavelength λ2 of the signal source laser beam L2 are both in the radiation spectrum of the gain medium, and the pump wavelength λ3 is in the absorption spectrum of the gain medium.
Referring to fig. 3, A1 represents an ytterbium ion absorption spectrum, E1 represents an ytterbium ion emission spectrum, when the ion doped in the doped ion gain fiber 12 is ytterbium ion, the signal source wavelength λ1 of the signal source laser beam L1 and the signal source wavelength λ2 of the signal source laser beam L2 are both within the emission spectrum E1 of the gain medium, and the pump wavelength λ3 is within the absorption spectrum A1 of the gain medium.
Referring to fig. 4A, 4B and 5, the absorption and emission spectra of erbium ions and thulium ions are shown, and the laser signal source 1, the laser signal source 2 and the pump source 5 are selected according to the absorption and emission bands of erbium ions and thulium ions, so that the signal source wavelength λ1 of the signal source laser beam L1 and the signal source wavelength λ2 of the signal source laser beam L2 are both in the range of the erbium ion emission spectrum E2 and the thulium ion emission spectrum E4 of the gain medium, and the pump source wavelength λ3 is in the range of the erbium ion absorption spectrum A2 and the thulium ion absorption spectrum A4 of the gain medium.
The ions doped in the doped ion gain fiber 12 may be ytterbium ions, erbium ions, thulium ions, or other ions having similar effects. In fig. 3, 4A, 4B, and 5, the ordinate of each figure is different (for example, cross section, absorption, emission, degree, etc.), but the abscissa is the wavelength, and the figures are only schematic illustrations of selecting different laser signal sources 1,2, and 5 corresponding to different bands of absorption/emission spectra according to different ions doped in the doped ion gain fiber 12.
The fiber-coating power stripper 13 is connected to the doped ion gain fiber 12, and is used for filtering the energy of the pump source laser beam L3 remaining after passing through the doped ion gain fiber 12, and outputting a plurality of signal source laser beams LL1, LL2 after power amplification.
That is, after the source laser beams L1, L2 and the pump source laser beam L3 provided by the laser signal sources 1,2 and the pump source 5 are input into the multi-beam laser source system 100 provided by the present invention, the source laser beams LL1, LL2 with synchronously amplified power can be output at the same time.
Referring to fig. 1 and 2, a method for amplifying a multi-beam laser source using a multi-beam laser source system 100 according to the present invention is described, which includes the following steps:
step (a): the source laser beams L1, L2 are coupled into the same optical fiber 4 by a fiber coupler 3.
Step (b): the signal source laser beams L1, L2 and the pump source laser beam L3 are coupled into the doped ion gain fiber 12 by the fiber combiner 11, the signal source laser beams L1, L2 being transmitted in the core 121 of the doped ion gain fiber 12 and the pump source laser beam L3 being transmitted in the jacket 122 of the doped ion gain fiber 12.
Step (c): the pump source laser beam L3 first amplifies the signal source laser beam of the minimum wavelength, then amplifies the signal source laser beam of the sub-small wavelength with a part of the amplified signal source laser beam of the minimum wavelength, and so on until the power of all the signal source laser beams is amplified.
In the example where the signal source wavelength λ1 of the signal source laser beam L1 is smaller than the signal source wavelength λ2 of the signal source laser beam L2, the pump source laser beam L3 amplifies the signal source laser beam L1, and then amplifies the signal source laser beam L2 with a sub-small wavelength by using a part of the amplified signal source laser beam L1, and at this time, the laser signal source 1 can be regarded as a sub-pump source.
Step (d): the residual energy of the pump source laser beam L3 after passing through the doped ion gain fiber 12 is filtered by the fiber coating power stripper 13, and the power amplified signal source laser beams LL1, LL2 are output.
Referring to FIG. 6, a multi-beam laser source system 200 according to the present invention includes three laser signal sources 1,2,6, a Fiber coupler 3, a pump source 5, and a multi-wavelength laser amplifier (Hybrid-wavelength laser amplifier) 10. The multi-wavelength laser amplifier 10 is composed of a Fiber combiner (Fiber) 11, a doped Ion gain Fiber (Ion-doped gain Fiber) 12, and a jacket power stripper (CPS) 13.
The main difference between the present embodiment and the embodiment of fig. 1 is that the present embodiment has three laser signal sources 1,2,6, and each laser signal source 1,2,6 can provide a signal source laser beam L1, L2, L4. Each of the signal source laser beams L1, L2, L4 has a signal source wavelength, and the signal source wavelengths of the signal source laser beams L1, L2, L4 are different from each other. In addition, the power of the source laser beams L1, L2, L4 provided by each of the laser sources 1,2, 4 is different from each other, and the order of magnitude of the plurality of powers is opposite to the order of magnitude of the plurality of source wavelengths. And each of the signal source laser beams L1, L2 and L4 has a pulse width, the pulse widths are different from each other, and the order of the pulse widths is opposite to the order of the signal source wavelengths.
For example, the signal source laser beam L1 provided by the laser signal source 1 has a signal source wavelength λ1, a power W1 and a pulse width PW1, the signal source laser beam L2 provided by the laser signal source 2 has a signal source wavelength λ2, a power W2 and a pulse width PW2, and the signal source laser beam L4 provided by the laser signal source 6 has a signal source wavelength λ4, a power W4 and a pulse width PW4; if λ1 < λ2 < λ4, W1 > W2 > W4, PW1 > PW2 > PW4.
The optical fiber coupler 3 is used for coupling the signal source laser beams L1, L2 and L4 into the same optical fiber 4; the type of the optical fiber coupler 3 is not limited, and may be, for example, a wavelength division multiplexer (Wavelength Division Multiplexing, WDM).
The pump source 5 is configured to provide a pump source laser beam L3, where the pump source laser beam L3 has a pump source wavelength that is less than each of the signal source wavelengths.
For example, the pump source wavelength is λ3, and if the signal source wavelength λ1 of the signal source laser beam L1 is smaller than the signal source wavelength λ2 of the signal source laser beam L2, and the signal source wavelength λ2 of the signal source laser beam L2 is smaller than the signal source wavelength λ4 of the signal source laser beam L4, λ3 is smaller than λ1 is smaller than λ2 is smaller than λ4.
The optical fiber combiner 11 is connected to the optical fiber 4, and the optical fiber combiner 11 is used for coupling the signal source laser beams L1, L2, L4 and the pump source laser beam L3.
The doped ion gain fiber 12 is connected to the fiber combiner 11, and the fiber combiner 11 transmits the signal source laser beams L1, L2, L4 and the pump source laser beam L3 into the doped ion gain fiber 12 and amplifies the power of each signal source laser beam L1, L2, L4. The doped ion gain fiber 12 has a gain medium, the signal source wavelength λ1 of the signal source laser beam L1, the signal source wavelength λ2 of the signal source laser beam L2, and the signal source wavelength λ4 of the signal source laser beam L4 are all in the radiation spectrum of the gain medium, and the pump wavelength λ3 is in the absorption spectrum of the gain medium.
The fiber-coating power stripper 13 is connected to the doped ion gain fiber 12, and is used for filtering the energy of the pump source laser beam L3 remaining after passing through the doped ion gain fiber 12, and outputting the signal source laser beams LL1, LL2, LL4 after power amplification.
The embodiments of fig. 1 and 6 illustrate that the number of laser signal sources according to the present invention is not limited, and may be two or more.
To verify the feasibility of the invention, the applicant conducted experiments. Please refer to example 1 shown in the following table:
example 1:
in example 1, two laser signal sources S1 and S2 were selected, and the selected ion-doped gain fiber was ytterbium-doped gain fiber, and the ion absorption emission spectrum thereof is shown in fig. 3. The wavelength of a pump source selected according to the absorption and radiation spectrum of the ytterbium ion doped gain fiber is 915nm, the wavelength of a signal source of a laser signal source S1 is 1030nm, and the power before amplification is 6.5W; the signal source wavelength of the laser signal source S2 was 1080nm, and the power before amplification was 0.4W. The order of magnitude of the signal source wavelengths is opposite to the order of magnitude of the power before and/or after amplification.
With the multi-beam laser source system 100 of the present invention shown in fig. 1, the power of the laser signal source S1 with a signal source wavelength of 1030nm can be amplified from 6.5W to 380W, and the power of the laser signal source S2 with a signal source wavelength of 1080nm can be amplified from 0.4W to 20W.
Next, three laser signal sources S1, S2, S3 were selected in example 2.
Example 2:
with the multi-beam laser source system 100 of the present invention shown in fig. 1, the power of the laser signal source S1 with a signal source wavelength of 1030nm is amplified from 3W to 58W, the power of the laser signal source S2 with a signal source wavelength of 1064nm is amplified from 0.5W to 8W, and the power of the laser signal source S3 with a signal source wavelength of 1080nm is amplified from 0.1W to 1.5W. Similarly, the order of magnitude of the signal source wavelengths is reversed from the order of magnitude of the power before and/or after amplification
It should be noted that, if the wavelengths of the laser signal sources are the same, only the high-power laser signal source will be amplified due to the ion optical characteristics, while the low-power laser signal source has almost no amplification effect. Please refer to example 3 shown in the following table.
Example 3:
the ion-doped gain fiber selected in the embodiment 3 is ytterbium-doped gain fiber, the wavelength of the selected laser signal sources is 1030nm, but the power is different, and is respectively 6.5W and 0.4W, after the amplification effect of the multi-beam laser source system provided by the invention, the laser signal source S1 of 6.5W is amplified to 500W, and the power amplification factor is 76.9; as for the laser signal source S2 of 0.4W, the power amplification factor is only 1.6, and the amplification is 0.65W.
Embodiment 3 illustrates that when the laser sources are selected, the wavelengths of the sources of the laser sources should be different from each other for better efficiency.
In summary, the multi-beam laser source system provided by the invention utilizes the characteristic that doped ions of different gain fibers have absorption and emission spectrum energy levels, generates a hierarchical excitation source phenomenon in the gain fibers, realizes the multi-pumping phenomenon of the same gain fiber amplifier, enables laser signals with a plurality of different wavelengths (a plurality of beams) to coexist and synchronously amplify in the same fiber amplifier, and achieves simplification of the fiber system and improvement of the beam quality.
In addition, the invention adopts the all-fiber architecture design, can reduce the loss of laser transmission (less than 5 percent), solve the coaxial problem of multi-beam laser (100 percent sealing), can greatly improve the quality of laser beams, and plays an extremely role in multi-beam laser processing application, and is not limited to double beams.
Although the present invention has been described with reference to the above embodiments, it should be understood that the invention is not limited thereto, but rather may be modified or altered somewhat by persons skilled in the art without departing from the spirit and scope of the present invention.
Claims (8)
1. A multi-beam laser source system comprising:
a plurality of laser signal sources, each of the laser signal sources providing a signal source laser beam, each of the signal source laser beams having a signal source wavelength, the plurality of signal source wavelengths being different from each other;
the optical fiber coupler is used for coupling the plurality of signal source laser beams into the same optical fiber;
at least one pump source, each pump source for providing a pump source laser beam having a pump source wavelength, the pump source wavelength being less than the plurality of signal source wavelengths;
a multi-wavelength laser amplifier, comprising:
the optical fiber combiner is connected with the optical fiber and is used for coupling the plurality of signal source laser beams and the pumping source laser beam;
a doped ion gain fiber connected to the fiber combiner, the fiber combiner transmitting the plurality of signal source laser beams and the pump source laser beams into the doped ion gain fiber and amplifying the power of each of the signal source laser beams, the doped ion gain fiber having a gain medium, the plurality of signal source wavelengths falling within a range of a radiation spectrum of the gain medium, the pump source wavelengths falling within a range of an absorption spectrum of the gain medium; and
the fiber coating power stripper is connected with the doped ion gain fiber and is used for filtering the energy of the residual pumping source laser beams after passing through the doped ion gain fiber and outputting the plurality of signal source laser beams after power amplification.
2. The multi-beam laser source system of claim 1, wherein the ion doped ion gain fiber is doped with one of ytterbium ion, erbium ion, thulium ion.
3. The multi-beam laser source system of claim 1, wherein the powers of the source laser beams provided by each of the laser sources are different from each other and the order of magnitudes of the powers is opposite to the order of magnitudes of the plurality of source wavelengths.
4. The multi-beam laser source system of claim 1, wherein each of the signal source laser beams has a pulse width, the plurality of pulse widths are different from each other, and the order of magnitude of the plurality of pulse widths is opposite to the order of magnitude of the plurality of signal source wavelengths.
5. The multi-beam laser source system of claim 1, wherein the fiber coupler is a wavelength division multiplexer (Wavelength Division Multiplexing, WDM).
6. A method of multi-beam laser source amplification using the multi-beam laser source system of any one of claims 1-5, comprising the steps of:
(a) Coupling the plurality of source laser beams into an optical fiber by the fiber coupler;
(b) Coupling the plurality of signal source laser beams and the pump source laser beam into the doped ion gain fiber by the fiber combiner, the plurality of signal source laser beams propagating in a core of the doped ion gain fiber and the pump source laser beam propagating in a jacket of the doped ion gain fiber;
(c) The pump source laser beam firstly amplifies the signal source laser beam with the minimum wavelength, then the signal source laser beam with the sub-small wavelength is amplified by using part of the amplified signal source laser beam with the minimum wavelength, and the like until the power of all the signal source laser beams is amplified; and
(d) The energy of the residual pumping source laser beam after passing through the doped ion gain fiber is filtered by the fiber coating power stripper, and the multiple signal source laser beams after power amplification are output.
7. A multi-wavelength laser amplifier, comprising:
the optical fiber combiner is connected with the optical fiber and is used for coupling a plurality of signal source laser beams and pumping source laser beams; each signal source laser beam has a signal source wavelength, and the plurality of signal source wavelengths are different from each other; the pump source laser beam has a pump source wavelength that is less than the plurality of signal source wavelengths;
the doped ion gain optical fiber is connected with the optical fiber combiner, the optical fiber combiner transmits the plurality of signal source laser beams and the pump source laser beams into the doped ion gain optical fiber and synchronously amplifies the power of the plurality of signal source wavelengths, the doped ion gain optical fiber is provided with a gain medium, the plurality of signal source wavelengths fall in the range of the radiation spectrum of the gain medium, and the pump source wavelengths fall in the range of the absorption spectrum of the gain medium; and
the fiber coating power stripper is connected with the doped ion gain fiber and is used for filtering the power of the residual pumping source laser beams passing through the doped ion gain fiber and outputting the plurality of signal source laser beams after power amplification.
8. The multi-wavelength laser amplifier of claim 7, wherein the ion doped into the doped ion gain fiber is one of ytterbium ion, erbium ion, thulium ion.
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| TW109133901A TWI752661B (en) | 2020-09-29 | 2020-09-29 | System and method for multibeam laser source, and multibeam laser source device |
| TW109133901 | 2020-09-29 |
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| CN101510663A (en) * | 2009-03-06 | 2009-08-19 | 苏州大学 | Polarization dual wavelength fiber-optical ultrashort pulse laser |
| CN101740995A (en) * | 2009-12-11 | 2010-06-16 | 苏州大学 | Totally positive dispersion cavity mode-locked all-fiber laser |
| CN104319604A (en) * | 2014-11-03 | 2015-01-28 | 浙江师范大学 | Method for achieving laser output of open cavity fiber laser unit |
| CN104466639A (en) * | 2014-12-17 | 2015-03-25 | 中国人民解放军国防科学技术大学 | Intermediate infrared gas laser of multi-wavelength overtone cascade time sequence laser pump |
| TW201919293A (en) * | 2017-11-09 | 2019-05-16 | 財團法人工業技術研究院 | High power laser system |
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| US11211765B2 (en) * | 2016-10-13 | 2021-12-28 | Nlight, Inc. | Tandem pumped fiber amplifier |
| US10424895B2 (en) * | 2017-12-13 | 2019-09-24 | Industrial Technology Research Institute | Mode-locked fiber laser device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101510663A (en) * | 2009-03-06 | 2009-08-19 | 苏州大学 | Polarization dual wavelength fiber-optical ultrashort pulse laser |
| CN101740995A (en) * | 2009-12-11 | 2010-06-16 | 苏州大学 | Totally positive dispersion cavity mode-locked all-fiber laser |
| CN104319604A (en) * | 2014-11-03 | 2015-01-28 | 浙江师范大学 | Method for achieving laser output of open cavity fiber laser unit |
| CN104466639A (en) * | 2014-12-17 | 2015-03-25 | 中国人民解放军国防科学技术大学 | Intermediate infrared gas laser of multi-wavelength overtone cascade time sequence laser pump |
| TW201919293A (en) * | 2017-11-09 | 2019-05-16 | 財團法人工業技術研究院 | High power laser system |
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| TW202213888A (en) | 2022-04-01 |
| TWI752661B (en) | 2022-01-11 |
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