CN112636138A - Dual-wavelength fiber laser - Google Patents
Dual-wavelength fiber laser Download PDFInfo
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- CN112636138A CN112636138A CN202011377817.2A CN202011377817A CN112636138A CN 112636138 A CN112636138 A CN 112636138A CN 202011377817 A CN202011377817 A CN 202011377817A CN 112636138 A CN112636138 A CN 112636138A
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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
- H01S3/06754—Fibre amplifiers
- H01S3/06758—Tandem amplifiers
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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
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/08086—Multiple-wavelength emission
- H01S3/0809—Two-wavelenghth emission
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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
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/094042—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a fibre laser
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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
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
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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
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/10007—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
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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
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/10061—Polarization control
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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
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
Abstract
The invention discloses a dual-wavelength fiber laser, which comprises a seed source for providing signal light with various wavelengths, a fiber grating for selecting dual wavelengths and a two-stage amplification system consisting of a 980nm single-mode laser and a multimode laser; the seed source is a wide-spectrum SLD light source and has the characteristic of rich spectral components, two or even multiple wavelengths of laser output is realized through selective amplification of different wavelengths, the output ends of the seed source and a 980nm single-mode laser are connected with a wavelength division multiplexer, the rear of the wavelength division multiplexer is sequentially connected with an Er-doped optical fiber and an input port of a circulator, a second output port of the circulator is connected with a beam combiner, the rear of the beam combiner is sequentially connected with an Er/Yb co-doped optical fiber and an isolator, and the output end of the isolator is connected with a collimator. The technical scheme provided by the invention can realize dual-wavelength or even multi-wavelength laser output.
Description
Technical Field
The embodiment of the invention belongs to the technical field of fiber lasers, and particularly relates to a dual-wavelength fiber laser.
Background
The fiber laser has the advantages of good beam quality, good light transmission characteristic, good heat dissipation, high reliability and stability, small size, low power consumption and the like, and has wide application prospect. The optical fiber laser is adopted as a laser communication light source, so that the advantages of incomparable performance are achieved, the transmission error rate can be greatly reduced through dual-wavelength laser output, the data transmission bandwidth is improved, and the reliability of the dual-wavelength optical fiber laser is directly determined by the overall performance of the range finder as a core component of optical fiber laser communication.
The existing dual-wavelength fiber laser is usually realized by adopting a feedback loop, and for realizing dual-wavelength operation of the laser, the laser output polarization and gains with different wavelengths are usually required to be adjusted, so that the structure is complex.
Disclosure of Invention
The invention discloses an implementation scheme of a dual-wavelength fiber laser, which has the characteristic of simple structure when being applied to realize dual-wavelength operation.
The technical scheme adopted by the invention for solving the technical problems is as follows: a dual-wavelength fiber laser comprises a seed source for providing signal light with multiple wavelengths, a fiber grating for selecting dual wavelengths, and a first-stage and a second-stage optical path amplification system consisting of a 980nm single-mode laser and a multimode laser; the seed source is a wide spectrum SLD light source, the output ends of the seed source and the 980nm single-mode laser are connected with a wavelength division multiplexer, the rear part of the wavelength division multiplexer is sequentially connected with an Er-doped optical fiber and the input end of a circulator, the first output port of the circulator is connected with an optical fiber grating, the second output port and the output end of the multi-mode laser are connected with a beam combiner, the seed source provides signal light with multiple wavelength components and pump light emitted by the 980nm single-mode laser to be simultaneously injected into the wavelength division multiplexer to realize first-stage amplification, and after the signal light and the pump light are subjected to gain by the Er-doped optical fiber and then are, the light with specific wavelength is reflected and injected into the first output port of the circulator by the fiber grating and then is output through the second output port, the light output by the second output port is the laser with two wavelengths which need to be amplified, and the second output port of the circulator is connected with the beam combiner; the rear of the beam combiner is sequentially connected with an Er/Yb co-doped optical fiber and an isolator, the output end of the isolator is connected with a collimator, signal light provided by the circulator and pump light emitted by the multimode laser are simultaneously injected into the beam combiner, secondary power amplification is realized through the Er/Yb co-doped optical fiber, and then dual-wavelength laser output is realized through the collimator after the isolator is connected.
The dual-wavelength fiber laser has a seed source center wavelength of 1550nm, a 3dB bandwidth of 40nm and an output average power of 10 mW.
The center wavelength of the 980nm single-mode laser of the dual-wavelength fiber laser is 974nm or 976nm, and the output power is 400 mW.
The Er-doped fiber of the double-wavelength fiber laser is a Coractive Er12-6 fiber.
In the dual-wavelength fiber laser, the fiber grating is a chirped fiber grating.
The center wavelength of the multimode laser is 915nm or 940 nm.
The invention has the beneficial effects that:
the dual-wavelength fiber laser adopts an SLD as a seed light source, and adopts a fiber grating to select wavelengths to obtain laser outputs of two wavelengths;
2, the dual-wavelength fiber laser adopts a circulator to extract and amplify the wavelength selected by the fiber grating, and can realize different amplification ratios of the dual-wavelength laser by controlling gains of different wavelengths;
3, the optical fiber and the optical device of the dual-wavelength fiber laser can be in a polarization maintaining type, and laser polarization output can be realized by introducing a cascade polarization device and additionally arranging a polarization control unit;
4, the dual-wavelength fiber laser is suitable for wave bands of 1 μm, 1.5 μm and the like, and the gain fiber and the seed source are correspondingly adjusted according to different wave band requirements;
5, the dual-wavelength fiber laser is of an all-fiber structure and has better stability and reliability.
Drawings
FIG. 1 is a schematic structural view of embodiment 1 of the present invention;
fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.
The figures are numbered: 1-seed source, 2-980 nm single-mode laser, 3-wavelength division multiplexer, 4-Er doped fiber, 5-circulator, 6-fiber grating, 7-multimode laser, 8-beam combiner, 9-Er/Yb co-doped fiber, 10-isolator and 11-collimator.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples.
Example 1
Referring to fig. 1, the dual-wavelength fiber laser disclosed by the invention comprises a seed source 1 for providing signal light with multiple wavelengths, a fiber grating 6 for selecting dual wavelengths, and a first-stage optical path amplification system and a second-stage optical path amplification system which are composed of a 980nm single-mode laser 2 and a multimode laser 7.
The seed source 1 is an SLD light source, the output end of the SLD light source is connected with a wavelength division multiplexer 3, a 980nm single-mode laser 2 is selected for amplification in the first-stage amplification, an Er-doped optical fiber 4 is used as a gain optical fiber, the amplified light is injected into a port 1 of a circulator 5 and is output from a port 2 of the circulator 5, a dual-wavelength optical fiber grating 6 is connected to the port 2, the optical fiber grating 6 reflects light with specific wavelength and is injected into the port 2 of the circulator 5 and then is output from the port 3, the light output from the port 3 is two wavelength lasers which need to be amplified, the port 3 of the circulator 5 is connected with a beam combiner 8, the pump light is a multi-mode laser 7 with wavelength, the pump light and signal light realize power amplification through an Er/Yb co-doped optical fiber 9, an isolator 10 is connected thereafter, and dual-wavelength laser output is realized.
The SLD seed source 1 provides a wide-spectrum light source, the wide-spectrum light source is amplified through a primary Er-doped optical fiber 4, then the wavelength is selected through a fiber grating 6, dual-wavelength optical fiber laser output is achieved through secondary amplification, the secondary amplification selects pump light as a multi-mode laser with the wavelength of 940nm as an energy supply light source, and energy is injected into an Er/Yb co-doped optical fiber 9 through a beam combiner 8 to achieve power amplification. The SLD spectral bandwidth is wide, so that two wavelengths with the wavelength difference of dozens of nm can be selected for amplification output, and the dual-wavelength ratio output with different requirements can be realized by adjusting the reflectivity of the fiber grating 6 to match the amplification coefficient at the rear end.
The invention realizes the selection of optical signals with different wavelengths through the dual-wavelength fiber grating 6, realizes the transmission of optical signals with different wavelengths and the connection of power amplification optical paths through the circulator 5, and controls the second-stage different-wavelength amplification factors through the selection of the transmittance at different wavelengths of the fiber grating 6, thereby realizing the specific laser output requirement.
Example 2
Referring to fig. 2, the dual-wavelength fiber laser disclosed by the invention adopts an SLD seed source as a seed source 101, the center wavelength is 1550nm, the bandwidth of-3 dB is 40nm, the output average power is 10mW, a wider output spectrum provides suitable conditions for subsequent dual-wavelength amplification, the output tail fiber of the SLD seed source 101 is fused with the 1550 end of the WDM 301, the 980nm single-mode laser 201 is fused with the 980 end of the WDM, the center wavelength of the 980nm single-mode laser 201 is 974nm or 976nm, the output power is 400mW, 1550/980 common transmission is realized through the COM end of the WDM 301, then 4m of Er-doped fiber 401 and model number of corona Er12-6 are fused, the tail end of the Er-doped fiber 401 is connected with the 1 port of the circulator 501, the output is performed through the 2 port, the 2 port is connected with a dual-wavelength grating fiber 601, the two wavelengths are 1535nm and 1565nm respectively, and the 3dB bandwidths are 0.2nm and 0.5nm respectively, the reflectivities are 99% and 90%, and the dual wavelength fiber grating 601 is a chirped fiber grating. The 3 ports of the circulator 501 are welded with the signal end of the beam combiner 801, the pumping end of the beam combiner 801 is welded with the 8W 915nm multimode pump 701, the COM end of the beam combiner 801 is welded with the Er/Yb optical fiber 901 with the model of active DCF-EY-6/128, the length of the optical fiber is 5m, the tail end of the optical fiber is welded with the isolator 1001, and then the optical fiber collimator 1101 is connected to achieve laser collimation output.
The above-described embodiments are merely illustrative of the principles and effects of the present invention, and some embodiments may be applied, and it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the inventive concept of the present invention, and these embodiments are within the scope of the present invention.
Claims (6)
1. A dual wavelength fiber laser, characterized by: the dual-wavelength optical path amplifier comprises a seed source (1) for providing signal light with multiple wavelengths, a fiber grating (6) for realizing dual-wavelength selection, and a two-stage optical path amplification system consisting of a 980nm single-mode laser (2) and a multi-mode laser (7); the seed source (1) is a wide-spectrum SLD light source, the output ends of the seed source (1) and a 980nm single-mode laser (2) are connected with a wavelength division multiplexer (3), an Er-doped optical fiber (4) and a circulator (5) are sequentially connected behind the wavelength division multiplexer (3), one output port of the circulator (5) is connected with an optical fiber grating (6), the other output port and the output end of a multi-mode laser (7) are connected with a beam combiner (8), signal light provided by the seed source (1) and pump light emitted by the 980nm single-mode laser (2) are simultaneously injected into the wavelength division multiplexer (3) to realize first-stage amplification, the signal light is injected into the circulator (5) after being gained by the Er-doped optical fiber (4) and then is output to the optical fiber grating (6), and the optical fiber grating (6) reflects light with a specific wavelength and injects the light into one output port of the circulator (5); an Er/Yb co-doped optical fiber (9) and an isolator (10) are sequentially connected to the rear of the beam combiner (8), the output end of the isolator (10) is connected with a collimator (11), signal light provided by the circulator (5) and pump light emitted by the multimode laser (7) are simultaneously injected into the beam combiner (8) and then are amplified for the second stage through the Er/Yb co-doped optical fiber (9), and dual-wavelength laser output is realized through the collimator (11) after the isolator (10) is connected.
2. A dual wavelength fiber laser according to claim 1, wherein said seed source (1) has a center wavelength of 1550nm, a 3dB bandwidth of 40nm, and an output average power of 10 mW.
3. A dual wavelength fiber laser as claimed in claim 1, wherein the 980nm single mode laser (2) has a central wavelength of 974nm or 976nm and an output of 400 mW.
4. A dual wavelength fiber laser as claimed in claim 1, wherein said Er doped fiber (4) is of the type active Er 12-6.
5. A dual wavelength fiber laser as claimed in claim 1, wherein the fiber grating (6) is a chirped fiber grating.
6. A dual wavelength fiber laser according to claim 1, wherein the multimode laser (7) has a central wavelength of 915nm or 940 nm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011377817.2A CN112636138A (en) | 2020-11-30 | 2020-11-30 | Dual-wavelength fiber laser |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011377817.2A CN112636138A (en) | 2020-11-30 | 2020-11-30 | Dual-wavelength fiber laser |
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| CN112636138A true CN112636138A (en) | 2021-04-09 |
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| CN202011377817.2A Pending CN112636138A (en) | 2020-11-30 | 2020-11-30 | Dual-wavelength fiber laser |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5825520A (en) * | 1992-07-27 | 1998-10-20 | Huber; David R. | Optical demultiplexers with grating reflectors |
| US20060083464A1 (en) * | 2004-10-18 | 2006-04-20 | Myoung Sook Oh | Millimeter wave oscillator using fiber bragg grating |
| CN102738688A (en) * | 2012-06-15 | 2012-10-17 | 天津峻烽科技有限公司 | Temperature control system for erbium and ytterbium co-doped fiber amplifier |
| CN105406333A (en) * | 2015-12-23 | 2016-03-16 | 长春理工大学 | 1.7[Mu]m-waveband tunable Raman fiber laser based on ASE (Amplified Spontaneous Emission) pumping |
| CN205811268U (en) * | 2016-07-18 | 2016-12-14 | 湖北久之洋红外系统股份有限公司 | All-fiber adjusts Q optical fiber seed source laser |
| CN110095258A (en) * | 2019-05-26 | 2019-08-06 | 天津大学 | Rare earth ion life time of the level measuring device and measuring method in a kind of Active Optical Fiber |
-
2020
- 2020-11-30 CN CN202011377817.2A patent/CN112636138A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5825520A (en) * | 1992-07-27 | 1998-10-20 | Huber; David R. | Optical demultiplexers with grating reflectors |
| US20060083464A1 (en) * | 2004-10-18 | 2006-04-20 | Myoung Sook Oh | Millimeter wave oscillator using fiber bragg grating |
| CN102738688A (en) * | 2012-06-15 | 2012-10-17 | 天津峻烽科技有限公司 | Temperature control system for erbium and ytterbium co-doped fiber amplifier |
| CN105406333A (en) * | 2015-12-23 | 2016-03-16 | 长春理工大学 | 1.7[Mu]m-waveband tunable Raman fiber laser based on ASE (Amplified Spontaneous Emission) pumping |
| CN205811268U (en) * | 2016-07-18 | 2016-12-14 | 湖北久之洋红外系统股份有限公司 | All-fiber adjusts Q optical fiber seed source laser |
| CN110095258A (en) * | 2019-05-26 | 2019-08-06 | 天津大学 | Rare earth ion life time of the level measuring device and measuring method in a kind of Active Optical Fiber |
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