CN101510662A - Enhancement type fiber-optical laser for resonant cavity pump - Google Patents
Enhancement type fiber-optical laser for resonant cavity pump Download PDFInfo
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- CN101510662A CN101510662A CNA2009100198492A CN200910019849A CN101510662A CN 101510662 A CN101510662 A CN 101510662A CN A2009100198492 A CNA2009100198492 A CN A2009100198492A CN 200910019849 A CN200910019849 A CN 200910019849A CN 101510662 A CN101510662 A CN 101510662A
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Abstract
The invention provides a cavity resonator pump enhanced type fiber laser, pertaining to the technical field of fiber laser. The cavity resonator pump enhanced type fiber laser comprises a pumping source and a cavity resonator connected with the pumping source and is characterized in that the cavity resonator consists of a cavity resonator doped fiber and two silica fibers carved with two fiber gratings, the two silica fibers are connected to two ends of the cavity resonator doped fiber by connectors respectively in a connection mode of mechanical alignment, wherein the cavity resonator doped fiber and a fiber grating at the proximal end in the two silica fibers form an internal cavity resonator pumping enhanced module; one end of the cavity resonator is connected with the pumping source and the other end is connected with a wavelength division multiplex (WDM) coupler; light emitted from the pumping source enters the cavity resonator by the silica fiber at one side and is vibrated, amplified and enhanced by the cavity resonator and the internal cavity resonator pumping enhanced module to generate laser which is output through one end of the wavelength division multiplex coupler. The cavity resonator pump enhanced type fiber laser fulfills the purposes of high gain, high power and high signal to noise ratio.
Description
(1) technical field
The present invention relates to a kind of enhancement type fiber-optical laser for resonant cavity pump, belong to the fiber laser technology field.
(2) background technology
Along with the development and the application in national economy all departments of optical communication technique, also more and more higher for the requirement of signal source in the Fibre Optical Communication Technology.Now to the research of optical communication field with quote and mainly concentrate on three wave bands: S-band (about 1480-1530nm), C-band (about 1530nm-1565nm), L-band (about 1570-1610nm).The birth of fiber laser, with its lower manufacturing cost, more output wavelength, higher tunability and very high electrical efficiency have greatly promoted the development of optical fiber communication.The fiber laser of present stage uses semiconductor laser to do pumping source mostly, but the optical wavelength that semiconductor laser can be exported is less, can not satisfy the requirement of fiber laser for the pump light wavelength, traditional solution is to utilize the fiber laser of LD pumping to do pumping source, adopt the mode (as Fig. 3) of multistage pumping, can address the above problem preferably.What mention as the 5th phase of October in 2007 " laser technology " magazine 542 pages " mixing the thulium laser progress " the 2.3rd joint promptly is above-mentioned method for pumping.But this method is to realize pumping by the mode of introducing a fiber laser, between two resonant cavitys, exist junction loss inevitably, first order fiber laser output energy is lower, what be subjected to that the restriction gain of light of first order resonant cavity can not do is very big, pumping efficiency is lower, and beam quality is also relatively poor relatively.Above problem is all restricting the development of this pump technology, presses for to adopt a kind of new pump mode to address the above problem.
(3) summary of the invention
Defective and deficiency for overcoming prior art the present invention proposes a kind of enhancement type fiber-optical laser for resonant cavity pump.
A kind of enhancement type fiber-optical laser for resonant cavity pump, comprise pumping source and coupled resonant cavity, it is characterized in that resonant cavity is made up of resonant cavity doped fiber and two sections silica fibers that are carved with two fiber gratings, two sections silica fibers are connected resonant cavity doped fiber two ends by connector respectively, connected mode adopts the mechanical alignment mode, and wherein the resonant cavity doped fiber is formed internal resonance chamber pumping enhancing module with the near-end fiber grating in two silica fibers; One end of resonant cavity connects pumping source, and the other end links to each other with wave division multiplex coupler (WDM); The light that pumping source sends enters in the resonant cavity by the silica fiber of a side, produces laser after resonant cavity and internal resonance chamber pumping enhancing module vibration amplification enhancing, and laser is exported through wave division multiplex coupler one end.
Described pumping source is the 980nmDFB semiconductor laser.
Described resonant cavity doped fiber is that the thulium ytterbium is mixed tellurides optical fiber altogether, wherein thulium doped (Tm
3+) concentration be 800-1200ppm, doping ytterbium (Yb
3+) concentration be 400-800ppm.
Preferably, Tm in the described resonant cavity doped fiber
3+Doping content be 1000ppm, Yb
3+Doping content be 600ppm.
The length of described resonant cavity doped fiber is that 8m is to 20m.
Preferably, the length of described resonant cavity doped fiber is 13.5m.
In two fiber gratings on described two sections silica fibers, the reflection kernel wavelength of the fiber grating of two near-end inboards is 1064nm, and the two fiber grating reflection kernel wavelength in the far-end outside are 1470nm.
In the silica fiber of described pumping source end the fiber grating of the light side of entering to the reflection of light rate of 1470nm more than or equal to 99%; Another fiber grating to the reflection of light rate of 1064nm more than or equal to 99%.
In the silica fiber of described laser output Fang Yiduan inboard fiber grating to the reflection of light rate of 1064nm more than or equal to 99%; Another fiber grating to the reflection of light rate of 1470nm more than or equal to 90%.
The present invention in use, the tellurides optical fiber that the 980nm pump light is mixed altogether to the thulium ytterbium carries out end pumping, wherein the Yb in the tellurides optical fiber
3+Can send the fluorescence of centre wavelength about 1064nm after the process 980nm optical pumping, and centre wavelength can be used as Tm well at the light positive of 1064nm wave band
3+Pump light, send the fluorescence of centre wavelength about 1470nm, because the reflection kernel wavelength of inboard a pair of fiber grating is just at 1064nm, therefore the amplification of will in the internal resonance chamber, vibrating of the fluorescence about this wave band, simultaneously again ceaselessly the light to about 1470nm transform, whole process is from final effect, it is the pump light of input 980nm, exported the fluorescence about 1470nm, under the effect of outside 1470nm reflection fiber grating, formed stable laser generation, final light beam is through a double-channel wave division multiplex coupler, laser from about the 1470nm output output 1470nm, and unnecessary pump light is from the output of another one channel, the light of 1470nm wave band belongs to S-band.
Beneficial effect of the present invention can be learnt according to the narration to such scheme, resonant cavity pump enhancement mode pump mode is to utilize the 980nm semiconductor laser that inner resonator mode piece is carried out pump-coupling, multistage pump mode with respect to has in the past improved pumping efficiency.In addition, the resonant cavity of two series connection is merged into a resonant cavity, has avoided resonant cavity to connect the loss that brings, improved the power of output light and the quality of light beam by the mode of mixing altogether.Moreover resonant cavity enhanced pump mode has reduced the volume of laser greatly.Through experiment test, be 0.3w at pumping light power, pump light centre wavelength is at 980nm, and the length of tellurides optical fiber is at 13.5m, Tm
3+Doping content be 1000ppm, Yb
3+Doping content be 600ppm, the fiber grating reflectivity in left side is 99%, right side fiber reflection rate is under 90% situation, the optical gain of inner one way can be higher than 20dB, and noise gain has only about 5dB, has improved signal to noise ratio greatly.Resonant cavity enhanced pump mode provides a kind of brand-new thinking for the research of fiber laser and fiber amplifier, promptly improve pumping efficiency and increase the power of exporting light by the structure of improving pump mode and resonant cavity, for the development of S-band communication provides the good signal source, promoted the development of optical fiber communication cause.
(4) description of drawings
The present invention will be further described below in conjunction with drawings and Examples, but be not limited thereto.
Fig. 1 is the structural representation of apparatus of the present invention.
Wherein: 1, fiber grating, 2, fiber grating, 3, connector, 3 ' connector, 4, wave division multiplex coupler, 5, resonant cavity doped fiber, 6, pumping source, 7, fiber grating, 8, fiber grating, 9, the 1470nm laser output, 10,980nm pump light output.
Fig. 2 is that the pumping of internal resonance chamber strengthens module diagram.Wherein: 11, resonant cavity doped fiber fibre core, 12, resonant cavity doped fiber covering.
Fig. 3 is traditional multistage pumping formula fiber laser schematic diagram.
Wherein, 13, mix Yb
3+Tellurides optical fiber, 14, mix Tm
3+Tellurides optical fiber, 15, pumping source, 16, fiber grating, 17, fiber grating, 18, connector, 19, fiber grating, 20, fiber grating, 21, wave division multiplex coupler, 22, the 1470nm laser output, 23,980nm pump light output.
(5) embodiment
The present invention will be further described below in conjunction with drawings and Examples, but be not limited thereto.
Embodiment 1:
The embodiment of the invention as shown in Figure 1, comprise pumping source 6 and coupled resonant cavity, it is characterized in that resonant cavity is made up of resonant cavity doped fiber 5 and two sections silica fibers that are carved with two fiber gratings, two sections silica fibers are respectively by connector 3 and 3 ' be connected resonant cavity doped fiber 5 two ends, connected mode adopts the mechanical alignment mode, and wherein resonant cavity doped fiber 5 is formed internal resonance chamber pumpings enhancing modules with the near- end fiber grating 2 and 8 in two silica fibers; One end of resonant cavity connects pumping source 6, and the other end links to each other with wave division multiplex coupler (WDM) 4; The light that pumping source 6 sends enters in the resonant cavity by the silica fiber of a side, produces laser after resonant cavity and internal resonance chamber pumping enhancing module vibration amplification enhancing, and laser is exported through wave division multiplex coupler 4 one ends.
Described fiber grating 1 is quartzy bragg grating, and its reflectance spectrum centre wavelength is at 1470nm, and reflectivity is 99%.
Described fiber grating 2 is quartzy bragg gratings, and its reflectance spectrum centre wavelength is at 1064nm, and reflectivity is 99%.
Described fiber grating 7 is quartzy bragg gratings, and its reflectance spectrum centre wavelength is at 1470nm, and reflectivity is 90%.
Described fiber grating 8 is quartzy bragg gratings, and its reflectance spectrum centre wavelength is at 1064nm, and reflectivity is 99%
Described pumping source 6 is dfb semiconductor lasers, and its work centre wavelength is 980nm, and power output is 0.3w.
Described resonant cavity doped fiber 5 is that the thulium ytterbium is mixed tellurides optical fiber altogether, and its length is at 13.5m, Tm
3+Doping content be 1000ppm, Yb
3+Doping content be 600ppm.
The enhancement type fiber-optical laser for resonant cavity pump performance test: at pumping light power is 0.3w, and pump light centre wavelength is at 980nm, and the length of tellurides optical fiber is at 13.5m, Tm
3+Doping content be 1000ppm, Yb
3+Doping content be 600ppm, the fiber grating reflectivity in left side is 99%, right side fiber reflection rate is under 90% situation, the optical gain of inner one way can be higher than 20dB, and noise gain has only about 5dB, output center wavelength is at 1470nm.The test proof, the output characteristic of enhancement type fiber-optical laser for resonant cavity pump can be used for the communication of S-band, under the identical situation of pump energy, its power output is far longer than the power output of traditional multistage pumping formula fiber laser, realized high-gain, high power, the purpose of high s/n ratio.
Embodiment 2:
With embodiment 1, just the length of resonant cavity doped fiber 5 is 18m, wherein Tm
3+Doping content be 1100ppm, Yb
3+Doping content be 750ppm.
Embodiment 3:
With embodiment 1, just the length of resonant cavity doped fiber 5 is 10m, wherein Tm
3+Doping content be 900ppm, Yb
3+Doping content be 500ppm.
Claims (9)
1, a kind of enhancement type fiber-optical laser for resonant cavity pump, comprise pumping source and coupled resonant cavity, it is characterized in that resonant cavity is made up of resonant cavity doped fiber and two sections silica fibers that are carved with two fiber gratings, two sections silica fibers are connected resonant cavity doped fiber two ends by connector respectively, connected mode adopts the mechanical alignment mode, and wherein the resonant cavity doped fiber is formed internal resonance chamber pumping enhancing module with the near-end fiber grating in two silica fibers; One end of resonant cavity connects pumping source, and the other end links to each other with wave division multiplex coupler; The light that pumping source sends enters in the resonant cavity by the silica fiber of a side, produces laser after resonant cavity and internal resonance chamber pumping enhancing module vibration amplification enhancing, and laser is exported through wave division multiplex coupler one end.
2, a kind of enhancement type fiber-optical laser for resonant cavity pump as claimed in claim 1 is characterized in that described pumping source is the 980nmDFB semiconductor laser.
3, a kind of enhancement type fiber-optical laser for resonant cavity pump as claimed in claim 1 is characterized in that described resonant cavity doped fiber is that the thulium ytterbium is mixed tellurides optical fiber altogether, and Tm wherein mixes
3+Concentration be 800-1200ppm, doping Yb
3+Concentration be 400-800ppm.
4, a kind of enhancement type fiber-optical laser for resonant cavity pump as claimed in claim 1 is characterized in that Tm in the described resonant cavity doped fiber
3+Doping content be 1000ppm, Yb
3+Doping content be 600ppm.
5, a kind of enhancement type fiber-optical laser for resonant cavity pump as claimed in claim 1, the length that it is characterized in that described resonant cavity doped fiber are that 8m is to 20m.
6, a kind of enhancement type fiber-optical laser for resonant cavity pump as claimed in claim 1, the length that it is characterized in that described resonant cavity doped fiber is 13.5m.
7, a kind of enhancement type fiber-optical laser for resonant cavity pump as claimed in claim 1, it is characterized in that in two fiber gratings on described two sections silica fibers, the reflection kernel wavelength of the fiber grating of two near-end inboards is 1064nm, and the two fiber grating reflection kernel wavelength in the far-end outside are 1470nm.
8, a kind of enhancement type fiber-optical laser for resonant cavity pump as claimed in claim 1, the fiber grating that it is characterized in that the light side of entering in the silica fiber of described pumping source end to the reflection of light rate of 1470nm more than or equal to 99%; Another fiber grating to the reflection of light rate of 1064nm more than or equal to 99%.
9, a kind of enhancement type fiber-optical laser for resonant cavity pump as claimed in claim 1, it is characterized in that inboard fiber grating in the silica fiber of described laser output Fang Yiduan to the reflection of light rate of 1064nm more than or equal to 99%; Another fiber grating to the reflection of light rate of 1470nm more than or equal to 90%.
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| CN2009100198492A CN101510662B (en) | 2009-03-18 | 2009-03-18 | Enhancement type fiber-optical laser for resonant cavity pump |
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| CN101510662B CN101510662B (en) | 2010-10-13 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102130412A (en) * | 2011-02-17 | 2011-07-20 | 浙江大学 | Full optical fiber type pulse optical fiber laser based on stimulated brillouin scattering pulse compression |
| CN102361212A (en) * | 2011-10-27 | 2012-02-22 | 北京交通大学 | All-fiber thulium-holmium-codoped single mode fiber laser |
| CN103531997A (en) * | 2013-09-29 | 2014-01-22 | 上海交通大学 | Tunable cascade raman thulium-doped optical fiber laser |
| US8990075B2 (en) | 2007-01-12 | 2015-03-24 | Samsung Electronics Co., Ltd. | Method, apparatus, and medium for bandwidth extension encoding and decoding |
| CN105181674A (en) * | 2015-10-21 | 2015-12-23 | 南京工业大学 | Raman spectral enhancement system and enhancement method based on photonic crystal fiber resonant cavity |
| CN106169689A (en) * | 2016-08-25 | 2016-11-30 | 天津大学 | Auxiliary chamber pumping erbium-ytterbium co-doped fiber laser instrument |
| CN112670812A (en) * | 2020-12-23 | 2021-04-16 | 中红外激光研究院(江苏)有限公司 | Intermediate infrared laser based on rare earth ion doped ZBLAN optical fiber |
-
2009
- 2009-03-18 CN CN2009100198492A patent/CN101510662B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8990075B2 (en) | 2007-01-12 | 2015-03-24 | Samsung Electronics Co., Ltd. | Method, apparatus, and medium for bandwidth extension encoding and decoding |
| CN102130412A (en) * | 2011-02-17 | 2011-07-20 | 浙江大学 | Full optical fiber type pulse optical fiber laser based on stimulated brillouin scattering pulse compression |
| CN102130412B (en) * | 2011-02-17 | 2012-03-28 | 浙江大学 | Full optical fiber type pulse optical fiber laser based on stimulated brillouin scattering pulse compression |
| CN102361212A (en) * | 2011-10-27 | 2012-02-22 | 北京交通大学 | All-fiber thulium-holmium-codoped single mode fiber laser |
| CN103531997A (en) * | 2013-09-29 | 2014-01-22 | 上海交通大学 | Tunable cascade raman thulium-doped optical fiber laser |
| CN105181674A (en) * | 2015-10-21 | 2015-12-23 | 南京工业大学 | Raman spectral enhancement system and enhancement method based on photonic crystal fiber resonant cavity |
| CN106169689A (en) * | 2016-08-25 | 2016-11-30 | 天津大学 | Auxiliary chamber pumping erbium-ytterbium co-doped fiber laser instrument |
| CN112670812A (en) * | 2020-12-23 | 2021-04-16 | 中红外激光研究院(江苏)有限公司 | Intermediate infrared laser based on rare earth ion doped ZBLAN optical fiber |
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