CN111668685A - High-power narrow linewidth Raman optical fiber amplifier - Google Patents

High-power narrow linewidth Raman optical fiber amplifier Download PDF

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Publication number
CN111668685A
CN111668685A CN202010631124.5A CN202010631124A CN111668685A CN 111668685 A CN111668685 A CN 111668685A CN 202010631124 A CN202010631124 A CN 202010631124A CN 111668685 A CN111668685 A CN 111668685A
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Prior art keywords
optical fiber
narrow linewidth
fiber
linewidth
narrow
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CN202010631124.5A
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Inventor
许将明
张扬
叶俊
马小雅
宋家鑫
姚天甫
冷进勇
黄良金
肖虎
张汉伟
马鹏飞
刘伟
周朴
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National University of Defense Technology
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National University of Defense Technology
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Priority to CN202010631124.5A priority Critical patent/CN111668685A/en
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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
    • H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
    • H01S3/06716—Fibre compositions or doping with active elements
    • 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
    • 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
    • H01S3/30—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range using scattering effects, e.g. stimulated Brillouin or Raman effects
    • H01S3/302—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range using scattering effects, e.g. stimulated Brillouin or Raman effects in an optical fibre

Abstract

The invention discloses a high-power narrow-linewidth Raman fiber amplifier, which is characterized in that a narrow-linewidth signal source is used for providing a low-power narrow-linewidth signal, a pumping source is used for providing high-power pumping light, the low-power narrow-linewidth signal and the high-power pumping light are coupled into a phosphorus-doped fiber through a fiber beam combiner, finally, a Raman gain peak with frequency shift near 40THz in a Raman gain spectrum of the phosphorus-doped fiber is used for providing narrow-linewidth gain, the pumping light is converted into the narrow-linewidth signal for power amplification, and high-power narrow-linewidth Raman laser output is realized. Compared with a pure silicon-based optical fiber, the amplifier provided by the invention can realize narrow linewidth Raman laser output by using the Raman gain peak with frequency shift near 40THz in the phosphorus-doped optical fiber to provide gain.

Description

High-power narrow linewidth Raman optical fiber amplifier
Technical Field
The invention relates to the technical field of fiber lasers, in particular to a high-power narrow-linewidth Raman fiber amplifier.
Background
The fiber laser is widely applied to various fields such as optical communication, industrial processing, biomedical treatment, sensing detection and the like due to the advantages of simple structure, good beam quality, high conversion efficiency and the like. With the technological level of optical fiber manufacturing and the rapid development of diode pumping sources of high-brightness semiconductor lasers, the output power of optical fiber lasers is rapidly improved. However, most of conventional high-power fiber lasers provide gain based on rare earth ion doped fibers, are limited by the energy level structure of rare earth ions, can only work in a specific waveband, and are difficult to meet the application requirements of the fields of sodium guide, atmospheric remote sensing and the like on lasers with special wavelengths. The Raman fiber laser based on the stimulated Raman scattering effect has the advantages of wide gain spectrum, cascade operation, no need of phase matching and the like, and can generate laser output with any wavelength in the optical fiber transparent range as long as pumping laser with proper wavelength exists. In addition, the line width of a general high-power fiber laser/amplifier is usually from several nanometers to tens of nanometers, but in the special application fields of spectrum synthesis, laser radar, nonlinear frequency conversion and the like, the line width of a light source has higher requirements, and a wide-spectrum fiber laser hardly meets the application requirements. Therefore, the narrow-linewidth fiber Raman fiber laser has extremely high research value and application prospect. Most of the conventional raman fiber amplifiers provide gain based on a raman gain peak with a frequency shift near 13.2THz in a silica-based fiber, the line width of the gain peak is wide, and the 3dB line width of the gain peak is about 7.79THz, which is not favorable for realizing raman laser output with narrow line width.
Disclosure of Invention
The invention provides a high-power narrow-linewidth Raman fiber amplifier which is used for overcoming the defects that the line width of a gain peak of an amplifier is wide and the like in the prior art.
In order to achieve the above object, the present invention provides a high power narrow linewidth raman optical fiber amplifier, comprising: a narrow linewidth signal source, a pumping source, an optical fiber combiner and a phosphorus-doped optical fiber;
the output end of the narrow linewidth signal source and the output end of the pumping source are respectively welded with the input end of the optical fiber beam combiner and used for providing a narrow linewidth signal;
the optical fiber combiner comprises a plurality of input ends and an output end, the number of the input ends of the optical fiber combiner is equal to the sum of the number of the output ends of the narrow-linewidth signal source and the number of the output ends of the pump source, and the output end of the optical fiber combiner is welded with one end of the phosphorus-doped optical fiber;
and the other end of the phosphorus-doped optical fiber is used as the output end of the high-power narrow-linewidth Raman optical fiber amplifier and is used for outputting high-power narrow-linewidth Raman laser.
Compared with the prior art, the invention has the beneficial effects that:
the high-power narrow-linewidth Raman fiber amplifier provided by the invention utilizes a narrow-linewidth signal source to provide a low-power narrow-linewidth signal, then utilizes a pumping source to provide high-power pumping light, then the low-power narrow-linewidth signal and the high-power pumping light are coupled into a phosphorus-doped fiber through a fiber beam combiner, and finally utilizes a Raman gain peak with frequency shift near 40THz in a Raman gain spectrum of the phosphorus-doped fiber to provide narrow-linewidth gain. Compared with a pure silicon-based optical fiber, the amplifier provided by the invention has the advantages that in the Raman gain spectrum of the phosphorus-doped optical fiber adopted by the amplifier, a Raman gain peak with narrower line width is arranged near the frequency shift of 40THz, the 3dB line width of the Raman gain peak is about 1.24THz, the 3dB line width is obviously smaller than the 3dB line width (about 7.79THz) of the existing Raman gain peak near the frequency shift of 13.2THz, and the Raman laser output with narrow line width can be realized by utilizing the Raman gain peak near the frequency shift of 40THz in the phosphorus-doped optical fiber to provide gain.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a structural diagram of a high-power narrow linewidth raman optical fiber amplifier provided by the present invention;
FIG. 2 is a graph comparing the Raman gain spectrum of a phosphorus-doped fiber employed in the present invention with the Raman gain spectrum of a pure silicon-based fiber;
fig. 3 is a structural diagram of a high-power narrow linewidth raman optical fiber amplifier provided in embodiment 1 of the present invention;
fig. 4 is a structural diagram of a high-power narrow linewidth raman optical fiber amplifier provided in embodiment 2 of the present invention.
The reference numbers illustrate: 1: a narrow linewidth signal source; 11: a seed source laser; 12: an F-P cavity narrow linewidth filter; 13: a fiber isolator; 14: a fiber optic circulator; 15: a first port; 16: a second port; 17: a third port; 18: narrow linewidth fiber gratings; 2: welding points; 3: a pump source; 4: an optical fiber combiner; 5: a phosphorus-doped optical fiber; 6: an 8 deg. bevel angle.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a high-power narrow linewidth raman optical fiber amplifier, as shown in fig. 1, comprising: a narrow linewidth signal source 1, a pumping source 3, an optical fiber combiner 4 and a phosphorus-doped optical fiber 5;
the output end of the narrow linewidth signal source 1 and the output end of the pumping source 3 are respectively welded with the input end of the optical fiber beam combiner 4 to form three welding points 2, and the narrow linewidth signal source 1 is used for providing narrow linewidth signals;
the optical fiber combiner 4 comprises a plurality of input ends and an output end, the number of the input ends of the optical fiber combiner 4 is equal to the sum of the number of the output ends of the narrow-linewidth signal source 1 and the number of the output ends of the pumping source 3, and the output end of the optical fiber combiner 4 is welded with one end of the phosphorus-doped optical fiber 5 to form a welding point 2;
the other end of the phosphorus-doped optical fiber 5 is used as the output end of the high-power narrow-linewidth Raman optical fiber amplifier and is used for outputting high-power narrow-linewidth Raman laser.
The high-power narrow-linewidth Raman fiber amplifier provided by the invention utilizes a narrow-linewidth signal source to provide a low-power narrow-linewidth signal, then utilizes a pumping source to provide high-power pumping light, then the low-power narrow-linewidth signal and the high-power pumping light are coupled into a phosphorus-doped fiber through a fiber beam combiner, and finally utilizes a Raman gain peak with frequency shift near 40THz in a Raman gain spectrum of the phosphorus-doped fiber to provide narrow-linewidth gain. Compared with a pure silicon-based optical fiber, the amplifier provided by the invention has the advantages that in the Raman gain spectrum of the phosphorus-doped optical fiber adopted by the amplifier, a Raman gain peak with narrower line width is arranged near the frequency shift of 40THz, the 3dB line width of the Raman gain peak is about 1.24THz, the 3dB line width is obviously smaller than the 3dB line width (about 7.79THz) of the existing Raman gain peak near the frequency shift of 13.2THz, and the Raman laser output with narrow line width can be realized by utilizing the Raman gain peak near the frequency shift of 40THz in the phosphorus-doped optical fiber to provide gain.
Preferably, the frequency shift between the narrow linewidth signal output by the narrow linewidth signal source 1 and the optical signal output by the pump source 3 is equal to the frequency shift of the narrow linewidth gain peak in the raman gain spectrum of the phosphor doped fiber 5, which is shifted by 40 THz. Under this condition, the gain coefficient of the signal light (narrow linewidth signal) is the highest, the pump light is more sufficiently converted, and the output power of the signal light is the highest at this time.
Preferably, the narrow linewidth signal source 1 comprises a seed source laser 11 and an F-P cavity narrow linewidth filter 12;
the output end of the seed source laser 11 is welded with the input end of the F-P cavity narrow linewidth filter 12 and used for generating an initial signal;
the output end of the F-P cavity narrow linewidth filter 12 is welded with the input end of the optical fiber combiner 4, and is used for filtering the initial signal to generate a narrow linewidth signal.
Preferably, the narrow linewidth signal source 1 further includes an optical fiber isolator 13, and an optical signal in the optical fiber isolator 13 is transmitted unidirectionally to prevent backscattered light in the amplifier from entering the narrow linewidth signal source 1 to destroy the narrow linewidth signal;
the optical fiber isolator 13 is arranged between the F-P cavity narrow linewidth filter 12 and the optical fiber combiner 4, the input end of the optical fiber isolator 13 is welded with the output end of the F-P cavity narrow linewidth filter 12, and the output end of the optical fiber isolator 13 is welded with the input end of the optical fiber combiner 4.
Preferably, the narrow linewidth signal source 1 comprises a seed source laser 11, a fiber circulator 14 and a narrow linewidth fiber grating 18;
the optical fiber circulator 14 sequentially comprises a first port 15, a second port 16 and a third port 17, and optical signals are transmitted unidirectionally from the first port 15 to the third port 17 so as to prevent backward scattered light in the amplifier from entering the narrow linewidth signal source 1 to damage the narrow linewidth signals;
the output end of the seed source laser 11 is welded with the first port 15 and used for generating an initial signal;
one end of the narrow linewidth fiber grating 18 is welded with the second port 16 and used for reflecting the initial signal to generate a narrow linewidth signal;
the third port 17 is used as an output end of the narrow linewidth signal and is welded with the input end of the optical fiber combiner 4.
The initial signal provided by the seed source laser 11 is transmitted to the second port 16 via the first port 15 of the fiber circulator 14 to the narrow-linewidth fiber grating 18, and a narrow-linewidth reflected light signal is generated under the action of the narrow-linewidth fiber grating 18 to reenter the second port 16 of the fiber circulator 14 and finally output from the third port 17.
Preferably, the other end of the narrow linewidth fiber grating 18 is chamfered to suppress end feedback thereof and to increase output power.
Preferably, the output end of the high-power narrow linewidth Raman fiber amplifier is chamfered to inhibit the end face feedback of the high-power narrow linewidth Raman fiber amplifier and improve the output power.
Preferably, the angle of inclination of the bevel is 8 °, at which the suppression of end-face feedback is optimal.
Preferably, the high-power narrow linewidth raman fiber amplifier comprises 2 pump sources 3; the optical fiber combiner 4 is a (2+1) × 1 optical fiber combiner.
If there are N pump sources 3, the optical fiber combiner 4 is an (N +1) × 1 optical fiber combiner. The number of pump sources 3 is chosen according to the actual situation to meet different application requirements.
Preferably, the pump source 3 is one of a fiber laser, a semiconductor laser, and a gas laser. Common lasers are selected as the pumping sources, so that the cost is low and the acquisition is easy.
Preferably, the phosphorus-doped optical fiber 5 is a single-clad optical fiber or a multi-clad optical fiber. The commonly used phosphorus-doped optical fiber is selected, and the cost is low and the optical fiber is easy to obtain.
Preferably, the narrow linewidth signal source 1 is one of a fiber laser, a semiconductor laser, and a gas laser. Common lasers are selected as narrow linewidth signal sources, and the narrow linewidth signal sources are low in cost and easy to obtain.
Preferably, the 3dB line width of the narrow line width signal output by the narrow line width signal source 1 is less than or equal to 0.2nm, so as to ensure that the 3dB line width of the amplified laser is significantly narrower than that of the existing laser.
The amplifier provided by the invention adopts the phosphorus-doped optical fiber to gain and amplify the signal, and the phosphorus-doped optical fiber can realize no broadening of the narrow-linewidth signal while performing gain amplification on the signal, thereby outputting the narrow-linewidth Raman laser.
Example 1
The present embodiment provides a high-power narrow linewidth raman optical fiber amplifier, as shown in fig. 3, including a narrow linewidth signal source 1, two pump sources 3, (2+1) × 1 optical fiber combiner 4 and a phosphorus-doped optical fiber 5;
the narrow linewidth signal source 1 comprises a seed source laser 11, an optical fiber isolator 13 and an F-P cavity narrow linewidth filter 12, the optical fiber isolator 13 is arranged between the F-P cavity narrow linewidth filter 12 and the optical fiber combiner 4, the input end of the optical fiber isolator 13 is welded with the output end of the F-P cavity narrow linewidth filter 12, and the output end of the optical fiber isolator 13 is welded with the input end of the optical fiber combiner 4. The seed source laser 11 is used for generating an initial signal; the F-P cavity narrow linewidth filter 12 is used for filtering the initial signal to generate a narrow linewidth signal.
The output end of the narrow linewidth signal source 1 and the output end of the pumping source 3 are respectively welded with the input end of the optical fiber beam combiner 4 to form three welding points 2, and the narrow linewidth signal source 1 is used for providing narrow linewidth signals;
the optical fiber combiner 4 comprises three input ends (one of which is used for being welded with the output end of the narrow-linewidth signal source 1, and the other two of which are respectively used for being welded with the output end of the pumping source 3) and an output end, and the output end of the optical fiber combiner 4 is welded with one end of the phosphorus-doped optical fiber 5 to form a welding point 2;
the other end of the phosphorus-doped optical fiber 5 is used as the output end of the high-power narrow-linewidth Raman optical fiber amplifier and is used for outputting narrow-linewidth Raman laser. The output end of the high-power narrow linewidth Raman fiber amplifier is cut at an oblique angle of 8 degrees so as to inhibit the end face feedback of the high-power narrow linewidth Raman fiber amplifier.
The central wavelength of the F-P cavity filter 12 is the same as that of the seed source laser 11, and the 3dB line width is less than or equal to 0.2 nm.
Example 2
The present embodiment provides a high-power narrow linewidth raman optical fiber amplifier, as shown in fig. 3, including a narrow linewidth signal source 1, two pump sources 3, (2+1) × 1 optical fiber combiner 4 and a phosphorus-doped optical fiber 5;
the narrow linewidth signal source 1 comprises a seed source laser 11, an optical fiber circulator 14 and a narrow linewidth optical fiber grating 18; the optical fiber circulator 14 sequentially comprises a first port 15, a second port 16 and a third port 17, and optical signals are transmitted unidirectionally from the first port 15 to the third port 17 so as to prevent backward scattered light in the amplifier from entering the narrow linewidth signal source 1 to damage the narrow linewidth signals; the output end of the seed source laser 11 is welded with the first port 15 and used for generating an initial signal; one end of the narrow linewidth fiber grating 18 is welded with the second port 16 and used for reflecting the initial signal to generate a narrow linewidth signal; the third port 17 is used as an output end of the narrow linewidth signal and is welded with the input end of the optical fiber combiner 4. The initial signal provided by the seed source laser 11 is transmitted to the second port 16 via the first port 15 of the fiber circulator 14 to the narrow-linewidth fiber grating 18, and a narrow-linewidth reflected light signal is generated under the action of the narrow-linewidth fiber grating 18 to reenter the second port 16 of the fiber circulator 14 and finally output from the third port 17.
The output end of the narrow linewidth signal source 1 and the output end of the pumping source 3 are respectively welded with the input end of the optical fiber beam combiner 4 to form three welding points 2, and the narrow linewidth signal source 1 is used for providing narrow linewidth signals;
the optical fiber combiner 4 comprises three input ends (one of which is used for being welded with the output end of the narrow-linewidth signal source 1, and the other two of which are respectively used for being welded with the output end of the pumping source 3) and an output end, and the output end of the optical fiber combiner 4 is welded with one end of the phosphorus-doped optical fiber 5 to form a welding point 2;
the other end of the phosphorus-doped optical fiber 5 is used as the output end of the high-power narrow-linewidth Raman optical fiber amplifier and is used for outputting narrow-linewidth Raman laser. The output end of the high-power narrow linewidth Raman fiber amplifier is cut at an oblique angle of 8 degrees so as to inhibit the end face feedback of the high-power narrow linewidth Raman fiber amplifier.
The central wavelength of the narrow-linewidth fiber grating 18 is the same as that of the seed source laser 11, and the 3dB linewidth is less than or equal to 0.2 nm.
The frequency shift between the narrow linewidth signal output by the narrow linewidth signal source 1 and the optical signal output by the pump source 3 is equal to the frequency shift of the narrow linewidth gain peak in the raman gain spectrum of the phosphorus-doped optical fiber 5, and the shift value is 40 THz.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. A high power narrow linewidth raman fiber amplifier, comprising: a narrow linewidth signal source, a pumping source, an optical fiber combiner and a phosphorus-doped optical fiber;
the output end of the narrow linewidth signal source and the output end of the pumping source are respectively welded with the input end of the optical fiber beam combiner and used for providing a narrow linewidth signal;
the optical fiber combiner comprises a plurality of input ends and an output end, the number of the input ends of the optical fiber combiner is equal to the sum of the number of the output ends of the narrow-linewidth signal source and the number of the output ends of the pump source, and the output end of the optical fiber combiner is welded with one end of the phosphorus-doped optical fiber;
and the other end of the phosphorus-doped optical fiber is used as the output end of the high-power narrow-linewidth Raman optical fiber amplifier and is used for outputting high-power narrow-linewidth Raman laser.
2. The high power narrow linewidth raman fiber amplifier of claim 1, wherein said narrow linewidth signal source comprises a seed source laser and an F-P cavity narrow linewidth filter;
the output end of the seed source laser is welded with the input end of the F-P cavity narrow linewidth filter and used for generating an initial signal;
and the output end of the F-P cavity narrow linewidth filter is welded with the input end of the optical fiber beam combiner and is used for filtering the initial signal to generate a narrow linewidth signal.
3. The high power narrow linewidth raman fiber amplifier of claim 2, wherein the narrow linewidth signal source further comprises a fiber isolator, wherein optical signals are transmitted unidirectionally within the fiber isolator;
the optical fiber isolator is arranged between the F-P cavity narrow linewidth filter and the optical fiber combiner, the input end of the optical fiber isolator is welded with the output end of the F-P cavity narrow linewidth filter, and the output end of the optical fiber isolator is welded with the input end of the optical fiber combiner.
4. The high power narrow linewidth raman fiber amplifier of claim 1, wherein said narrow linewidth signal source comprises a seed source laser, a fiber circulator and a narrow linewidth fiber grating;
the optical fiber circulator sequentially comprises a first port, a second port and a third port, and optical signals are transmitted unidirectionally from the first port to the third port;
the output end of the seed source laser is welded with the first port and used for generating an initial signal;
one end of the narrow linewidth fiber grating is welded with the second port and used for reflecting the initial signal to generate a narrow linewidth signal;
and the third port is used as the output end of the narrow linewidth signal and is welded with the input end of the optical fiber beam combiner.
5. The high power narrow linewidth raman fiber amplifier according to claim 4, wherein the other end of said narrow linewidth fiber grating is chamfered.
6. The high power narrow linewidth raman fiber amplifier according to claim 1, wherein an output end of said high power narrow linewidth raman fiber amplifier is chamfered.
7. The high power narrow linewidth raman fiber amplifier according to claim 5 or 6, wherein the tilt angle of said bevel is 8 °.
8. The high power narrow linewidth raman fiber amplifier according to claim 1, wherein said high power narrow linewidth raman fiber amplifier comprises 2 pump sources; the optical fiber combiner is a (2+1) multiplied by 1 optical fiber combiner.
9. The high power narrow linewidth raman fiber amplifier of claim 8, wherein said pump source is one of a fiber laser, a semiconductor laser, and a gas laser.
10. The high power narrow linewidth raman fiber amplifier of claim 1, wherein said phosphorus doped fiber is a single clad fiber or a multi-clad fiber.
CN202010631124.5A 2020-07-03 2020-07-03 High-power narrow linewidth Raman optical fiber amplifier Pending CN111668685A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117498142A (en) * 2023-11-02 2024-02-02 上海频准激光科技有限公司 Optical signal amplifying device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117498142A (en) * 2023-11-02 2024-02-02 上海频准激光科技有限公司 Optical signal amplifying device

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