CN106532416B - High-power long-band all-fiber single-frequency laser structure - Google Patents

High-power long-band all-fiber single-frequency laser structure Download PDF

Info

Publication number
CN106532416B
CN106532416B CN201611268330.4A CN201611268330A CN106532416B CN 106532416 B CN106532416 B CN 106532416B CN 201611268330 A CN201611268330 A CN 201611268330A CN 106532416 B CN106532416 B CN 106532416B
Authority
CN
China
Prior art keywords
fiber
port
gain
output
grating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201611268330.4A
Other languages
Chinese (zh)
Other versions
CN106532416A (en
Inventor
陈达如
强则煊
郁张维
王悦辉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Normal University CJNU
Original Assignee
Zhejiang Normal University CJNU
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Normal University CJNU filed Critical Zhejiang Normal University CJNU
Priority to CN201611268330.4A priority Critical patent/CN106532416B/en
Publication of CN106532416A publication Critical patent/CN106532416A/en
Application granted granted Critical
Publication of CN106532416B publication Critical patent/CN106532416B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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
    • H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Lasers (AREA)

Abstract

The invention discloses a high-power long-wave-band all-fiber single-frequency laser structure. The signal end of the pump beam combiner is plated with a dichroic medium film; the output port of the semiconductor laser is connected with the pumping port; the output port of the pump beam combiner is connected with one end of the double-cladding erbium-ytterbium co-doped fiber; the other port of the double-cladding erbium-ytterbium co-doped fiber is connected with one port of the first fiber grating; the other port of the first fiber bragg grating is obliquely cut into 8 degrees, so that end face reflection is not generated; the signal end plated with the dichroic dielectric film is welded with one end of the high-gain phosphate optical fiber; the other end of the high-gain phosphate optical fiber is connected with one end of the second fiber grating; the other end of one end of the second fiber bragg grating is connected with the public end of the wavelength division multiplexer. The invention improves the pump conversion efficiency by utilizing the inter-band pump, adopts the dichromatic dielectric film to improve the length of the gain optical fiber and realizes high gain by the high-doped phosphate optical fiber, and has the advantages of low price, compact structure, high output power and the like.

Description

High-power long-band all-fiber single-frequency laser structure
Technical Field
The invention belongs to the technical field of fiber lasers, and particularly relates to a miniaturized structure of a high-power long-band all-fiber single-frequency laser based on interband pumping.
Background
The single-frequency fiber laser refers to a fiber laser with only one longitudinal mode oscillation in a resonant cavity. The output spectrum has very narrow line width and quite good coherence property, and the coherence length can reach hundreds of kilometers, so that the method has great and strong demands on ultra-high precision and ultra-long distance detection. Typically, single frequency fiber lasers have a linear cavity structure, a ring cavity structure, and a composite cavity structure. The composite cavity structure fiber laser is a deformation of a linear cavity structure or a combination of a linear cavity and an annular cavity structure. Thus, it can be said that the linear cavity structure and the annular cavity structure are the most basic two structures for realizing a single-frequency laser. At present, the linear cavity adopts a single-mode fiber core pumping mode, the coupling efficiency is low, and the coupling efficiency is limited by the fact that the single-mode semiconductor pumping source cannot exceed 1 watt of power, and watt level or even higher power output cannot be directly realized. The annular cavity and the composite cavity have longer cavity length, complex structure, easy occurrence of mode jump, poor stability and serious deficiency of output power. On the other hand, the gain fiber has a certain gain spectrum width, the long wave band generally works at the tail part of the gain, and the power conversion efficiency is low. Gain fibers over many meters are typically required for long wavelength bands. Increasing the length of the fiber fails to meet the single longitudinal mode limitations.
Disclosure of Invention
The invention provides a miniaturized linear cavity structure of a high-power long-band all-fiber single-frequency laser based on inter-band pumping, aiming at the defects of the prior art.
In order to solve the technical problems, the invention adopts the following technical means:
the invention comprises 1535/1590nm dichroic medium film, pump beam combiner, high power multimode 976nm semiconductor laser, double-clad erbium ytterbium co-doped fiber, first fiber grating with high reflectivity band-to-band reflection wavelength, high gain phosphate fiber, second fiber grating with low reflectivity output laser wavelength, 1535/1590nm wavelength division multiplexer and output fiber isolator.
The signal end of the pump beam combiner is plated with a dichroic medium film; the output port of the semiconductor laser is connected with the pumping port of the pumping beam combiner; the output port of the pump beam combiner is connected with one end of the double-cladding erbium-ytterbium co-doped fiber; the other port of the double-cladding erbium-ytterbium co-doped fiber is connected with one port of the first fiber grating; the other port of the first fiber bragg grating is obliquely cut into 8 degrees, so that end face reflection is not generated, and the end face is coated with high-refractive index matching liquid to filter out the rest 976nm pump light; the signal end plated with the dichroic dielectric film is welded with one end of the high-gain phosphate optical fiber; the other end of the high-gain phosphate optical fiber is connected with one end of the second fiber grating; the other end of one end of the second fiber bragg grating is connected with the public end of the wavelength division multiplexer, and the 1535nm output arm of the wavelength division multiplexer is beveled to form 8 degrees, so that end face reflection is not generated; the 1590nm output arm of the wavelength division multiplexer is connected with the output optical fiber isolator.
The invention is mainly suitable for obtaining a high-power long-band all-fiber single-frequency fiber laser, utilizes the inter-band pumping to improve the pumping conversion efficiency, adopts the dichroic dielectric film to improve the length of the gain fiber and the high-doped phosphate fiber to realize high gain, and has the advantages of low price, compact structure, high output power and the like.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
As shown in fig. 1, taking the long-band erbium-doped fiber as an example, the scheme is equally applicable to the long-band application of other doped fibers. The device for realizing the high-power long-band erbium-doped all-fiber single-frequency fiber laser comprises a 1535/1590nm dichroic medium film 1, a pump beam combiner 2, a high-power (10W) multimode 976nm semiconductor laser 3, a double-cladding erbium-ytterbium co-doped fiber 4 with the length of L1 (2-5 m), a fiber grating with high reflectivity and inter-band reflection wavelength (the reflectivity is 99%, the half-width is 0.2nm, the center wavelength is 1535 nm) 5, a high-gain phosphate fiber 6 with the length of L2 (2-3 cm), a fiber grating with low reflectivity and output laser wavelength (the reflectivity is 30-60%, the half-width is 0.06nm, the center wavelength is 1590 nm) 7, a 1535/1590 wavelength division multiplexer 8 and an output fiber isolator 9.
The signal end of the pump beam combiner is plated with 1535/1590nm dichroic medium film; the output port of the high-power (10W) multimode 976nm semiconductor laser is connected with the pump port of the pump beam combiner; the output port of the pump beam combiner is connected with a double-cladding erbium-ytterbium co-doped optical fiber with the length of L1 (2-5 meters); the other end of the gain fiber is connected with a fiber grating with the reflectivity of 99 percent, the half-width of 0.2nm and the center wavelength of 1535 nm; the other port of the fiber bragg grating is obliquely cut into 8 degrees, so that end face reflection is not generated, and the end face is coated with high-refractive index matching liquid to filter out the rest 976nm pump light; the output optical fiber plated with the dichroic dielectric film is welded with the high-gain phosphate optical fiber; the other end of the high-gain phosphate optical fiber is connected with a low-reflectivity narrow-band 1590nm optical fiber grating; the output end of the output grating is connected with the public end of the 1535nm/1590nm wavelength division multiplexer, and the 1535nm output arm is beveled to 8 degrees so as not to generate end surface reflection; the 1590nm output arm is connected to an output fiber isolator.
To better maintain single frequency, the package may be held in an optical box with temperature controlled feedback. The connection is obtained by a non-polarization-maintaining long-band high-power single-frequency fiber laser. If the polarization-maintaining long-wave band high-power single-frequency fiber laser is obtained, the low-reflectivity fiber grating and the output optical isolator at the output end are simply changed into the polarization-maintaining fiber grating and the polarization-maintaining optical isolator.
In summary, the invention adopts the wavelength near the gain spectrum peak of the gain fiber as the novel pumping wavelength to replace the traditional short wavelength semiconductor pumping source so as to improve the pumping conversion efficiency. The inter-band pumping source can realize single-mode pumping with more than several watts by using the double-cladding gain optical fiber and the low-cost high-power multimode semiconductor pumping source so as to effectively solve the problem that the traditional single-mode semiconductor pumping cannot burst the power limit of the watts. In order to further increase the output power of the inter-band pumping, the pumping mode can adopt reverse pumping, which is also beneficial to eliminating the influence of the residual short-wavelength pumping light on the single-frequency linear cavity. In addition, the inter-band pumping can effectively reduce the thermal effect and greatly help the frequency stabilization of the single-frequency laser.
In view of the miniaturization of the structure and the use of long-point gain fibers as much as possible while maintaining the optical length of the laser, the inter-band pump output fibers fabricated above are coated with dichroic dielectric films so as to be partially transparent to the inter-band pump wavelengths and highly reflective to the long-band laser wavelengths. As the thickness of the film is reduced greatly compared with the length of the traditional fiber grating, precious length is won for the high-gain fiber, and the pump absorption efficiency is effectively improved.
Considering that the length of the single-frequency gain optical fiber is relatively short, generally about 2 cm, the length saved by adding the two-color directional dielectric film is generally not more than 3 cm, and the high-doped phosphate optical fiber is adopted to improve the gain of a long wave band.

Claims (5)

1. The utility model provides a high-power long wave band all-fiber single frequency laser structure, includes 1535/1590nm dichroic dielectric film, pump beam combiner, high-power multimode 976nm semiconductor laser, double-deck erbium ytterbium codoped fiber, high reflectivity interband reflection wavelength's first fiber grating, high gain phosphate optic fibre, low reflectivity output laser wavelength's second fiber grating, 1535/1590nm wavelength division multiplexer and output fiber isolator, its characterized in that:
the signal end of the pump beam combiner is plated with a dichroic medium film; the output port of the semiconductor laser is connected with the pumping port of the pumping beam combiner; the output port of the pump beam combiner is connected with one end of the double-cladding erbium-ytterbium co-doped fiber; the other port of the double-cladding erbium-ytterbium co-doped fiber is connected with one port of the first fiber grating; the other port of the first fiber bragg grating is obliquely cut into 8 degrees, so that end face reflection is not generated, and the end face is coated with high-refractive index matching liquid to filter out the rest 976nm pump light; the signal end plated with the dichroic dielectric film is welded with one end of the high-gain phosphate optical fiber; the other end of the high-gain phosphate optical fiber is connected with one end of the second fiber grating; the other end of one end of the second fiber bragg grating is connected with the public end of the wavelength division multiplexer, and the 1535nm output arm of the wavelength division multiplexer is beveled to form 8 degrees, so that end face reflection is not generated; the 1590nm output arm of the wavelength division multiplexer is connected with the output optical fiber isolator.
2. The high power long band all-fiber single frequency laser structure of claim 1, wherein: the reflectivity of the first fiber bragg grating is 99%, the half-width is 0.2nm, and the center wavelength is 1535nm.
3. The high power long band all-fiber single frequency laser structure of claim 1, wherein: the reflectivity of the second fiber bragg grating is 30-60%, the half-width is 0.06nm, and the center wavelength is 1590nm.
4. The high power long band all-fiber single frequency laser structure of claim 1, wherein: the length of the double-cladding erbium-ytterbium co-doped optical fiber is 2-5 meters.
5. The high power long band all-fiber single frequency laser structure of claim 1, wherein: the length of the high-gain phosphate optical fiber is 2-3 cm.
CN201611268330.4A 2016-12-31 2016-12-31 High-power long-band all-fiber single-frequency laser structure Active CN106532416B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611268330.4A CN106532416B (en) 2016-12-31 2016-12-31 High-power long-band all-fiber single-frequency laser structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611268330.4A CN106532416B (en) 2016-12-31 2016-12-31 High-power long-band all-fiber single-frequency laser structure

Publications (2)

Publication Number Publication Date
CN106532416A CN106532416A (en) 2017-03-22
CN106532416B true CN106532416B (en) 2023-10-03

Family

ID=58336620

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201611268330.4A Active CN106532416B (en) 2016-12-31 2016-12-31 High-power long-band all-fiber single-frequency laser structure

Country Status (1)

Country Link
CN (1) CN106532416B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106961066B (en) * 2017-05-17 2023-07-28 河北大学 Half-open-cavity multi-wavelength random fiber laser based on overlapped fiber bragg gratings
CN108267231A (en) * 2018-03-19 2018-07-10 浙江师范大学 High-capacity optical fiber laser power and SBS threshold on-Line Monitor Device
CN108646351B (en) * 2018-04-23 2020-05-05 三峡大学 Tail fiber end face structure of fiber grating array and manufacturing method
CN110571634B (en) * 2019-08-12 2021-02-12 武汉光迅科技股份有限公司 Optical signal output device and method, and storage medium
CN112072453A (en) * 2020-08-31 2020-12-11 山东森峰激光装备有限公司 Reverse-pumping multistage-amplification continuous MOPA fiber laser and laser generation method
CN112799118B (en) * 2020-12-30 2024-04-26 西北核技术研究所 Scintillation detector capable of improving detection efficiency and detection method thereof
CN113872029B (en) * 2021-09-30 2023-10-03 上海频准激光科技有限公司 Dual-wavelength single-frequency distributed feedback fiber laser and system
CN113991400B (en) * 2021-10-25 2024-08-06 上海拜安实业有限公司 Fiber laser for realizing high power and high output aiming at laser radar
CN115377781A (en) * 2022-08-22 2022-11-22 中国科学院西安光学精密机械研究所 High-power 3-micron-band optical fiber amplifier based on single crystal optical fiber

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6263003B1 (en) * 1997-02-14 2001-07-17 Alliedsignal Inc. High-power cladding-pumped broadband fiber source and amplifier
EP1322005A1 (en) * 2001-12-19 2003-06-25 University Of Southampton Sources and methods of generating optical radiation
CN1910795A (en) * 2002-09-18 2007-02-07 欧贝兹光波有限公司 Traveling-wave lasers with a linear cavity
CN101459313A (en) * 2008-12-31 2009-06-17 华南理工大学 Multiple wavelength outputting ultra-narrow wire single frequency optical fiber laser
CN201323377Y (en) * 2008-12-26 2009-10-07 厦门大学 Tunable ytterbium-mixed doubly coated fiber laser
CN102239434A (en) * 2008-12-04 2011-11-09 Imra美国公司 Highly rare-earth-doped optical fibers for fiber lasers and amplifiers
CN103531994A (en) * 2013-10-11 2014-01-22 山东海富光子科技股份有限公司 Same-bandwidth pumping single-frequency optical fiber laser using erbium-doped quartz optical fiber as gain medium
CN105589195A (en) * 2016-03-16 2016-05-18 电子科技大学 All-optical modulator apparatus based on black phosphorus
CN206322996U (en) * 2016-12-31 2017-07-11 浙江师范大学 A kind of high power long-wave band all -fiber single-frequency laser structure

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6263003B1 (en) * 1997-02-14 2001-07-17 Alliedsignal Inc. High-power cladding-pumped broadband fiber source and amplifier
EP1322005A1 (en) * 2001-12-19 2003-06-25 University Of Southampton Sources and methods of generating optical radiation
CN1910795A (en) * 2002-09-18 2007-02-07 欧贝兹光波有限公司 Traveling-wave lasers with a linear cavity
CN102239434A (en) * 2008-12-04 2011-11-09 Imra美国公司 Highly rare-earth-doped optical fibers for fiber lasers and amplifiers
CN201323377Y (en) * 2008-12-26 2009-10-07 厦门大学 Tunable ytterbium-mixed doubly coated fiber laser
CN101459313A (en) * 2008-12-31 2009-06-17 华南理工大学 Multiple wavelength outputting ultra-narrow wire single frequency optical fiber laser
CN103531994A (en) * 2013-10-11 2014-01-22 山东海富光子科技股份有限公司 Same-bandwidth pumping single-frequency optical fiber laser using erbium-doped quartz optical fiber as gain medium
CN105589195A (en) * 2016-03-16 2016-05-18 电子科技大学 All-optical modulator apparatus based on black phosphorus
CN206322996U (en) * 2016-12-31 2017-07-11 浙江师范大学 A kind of high power long-wave band all -fiber single-frequency laser structure

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
杨昌盛 等."1.5μm波段连续单频光纤激光器的研究进展".《中国科学：化学》.2013,第43卷(第11期),1407-1417. *

Also Published As

Publication number Publication date
CN106532416A (en) 2017-03-22

Similar Documents

Publication Publication Date Title
CN106532416B (en) High-power long-band all-fiber single-frequency laser structure
TW444424B (en) Semiconductor-solid state laser optical waveguide pump device and method
CN102306897B (en) Ultra narrow linewidth low noise high power single frequency fiber laser
CN103531994A (en) Same-bandwidth pumping single-frequency optical fiber laser using erbium-doped quartz optical fiber as gain medium
CN105261921A (en) Short resonant cavity all-fiber narrow line-width single frequency laser
CN103236630A (en) Single-frequency optical fiber laser using rare earth-doped quartz optical fiber as gain medium
CN102761048A (en) Tunable Raman fiber laser
CN103050875A (en) Polarization-preserving fiber laser
CN102522693A (en) Fiber Raman yellow laser based on main oscillation power amplifier
CN110635346A (en) Ring cavity 1.7um thulium-doped all-fiber laser
CN103811985A (en) Miniature ErYb co-doped superfluorescent optical fiber light source
CN104051938A (en) Optical fiber laser device
CN110556691B (en) Short linear cavity orbital angular momentum mode single-frequency fiber laser
CN109038186A (en) A kind of flat type erbium-ytterbium co-doped fiber light source
CN210296856U (en) Single-frequency single-mode single-polarization optical fiber laser amplifier and laser system
CN202059039U (en) Double cladding photonic crystal fiber laser of 980nm
CN103618202B (en) A kind of broadband light source system adopting C-band Er-doped fiber to produce C+L wave band
Yao et al. 400 W all-fiberized Tm-doped MOPA at 1941 nm with narrow spectral linewidth
CN114825007A (en) Narrow linewidth optical fiber laser based on composite intracavity standing wave condition screening scheme
CN204243445U (en) A kind of high power narrow linewidth linearly polarized light fibre laser
CN112769029A (en) DBR short-cavity single-frequency fiber laser of multimode semiconductor pump source cladding pumping
CN206322996U (en) A kind of high power long-wave band all -fiber single-frequency laser structure
CN102931573A (en) Parameter-mismatched fiber laser
CN103825180B (en) A kind of low noise protects inclined single frequency optical fiber laser
CN101478112A (en) Optical fiber laser pump protecting apparatus and method

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
CB03 Change of inventor or designer information

Inventor after: Chen Daru

Inventor after: Qiang Zexuan

Inventor after: Yu Zhangwei

Inventor after: Wang Yuehui

Inventor before: Qiang Zexuan

Inventor before: Chen Daru

Inventor before: Yu Zhangwei

Inventor before: Wang Yuehui

CB03 Change of inventor or designer information
GR01 Patent grant
GR01 Patent grant