CN103001107A - Multi-pass chirped fiber grating pulse broadening device - Google Patents
Multi-pass chirped fiber grating pulse broadening device Download PDFInfo
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- CN103001107A CN103001107A CN2012105410380A CN201210541038A CN103001107A CN 103001107 A CN103001107 A CN 103001107A CN 2012105410380 A CN2012105410380 A CN 2012105410380A CN 201210541038 A CN201210541038 A CN 201210541038A CN 103001107 A CN103001107 A CN 103001107A
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Abstract
Disclosed is a Multi-pass chirped fiber grating pulse broadening device for. The device comprises a wide-spectrum signal source, a 2*2 acoustic optical modulator, an optical fiber circulator, a chirped fiber grating, an optical fiber isolator, gain media, a wavelength division multiplexer, a band-pass filter, a general control trigger signal source, a digital pulse delay generator, a pumping protector and a pumping source. The device has the advantages that pulse broadening of large dispersion measures can be achieved through the short chirped fiber grating, the broadening amount can be adjusted freely by controlling the broadening times through gate signals generated by the digital pulse delay generator, and accordingly, the cost is reduced effectively, all-fiber is achieved, the structure is compact, and energy losses in a broadening process are compensated.
Description
Technical field
The present invention relates to the wide range laser pulse, particularly a kind of multipass chirped fiber grating pulse broadening device that is applicable to the time explanation of wide range laser pulse.
Background technology
In recent years because the appearance in high power pump source and the raising of fiber manufacturing level make fiber laser no longer be confined to lower powered level.High-octane light pulse usually is difficult to directly be obtained by laser, needs one or more amplifier to amplify pulse from the outside, but along with the increase of pulse peak power, the nonlinear effect in the amplifier will make the pulse generation distortion, limit the amplification of energy.Chirped pulse amplification made it to introduce before pulse is amplified to warble and broadening, thereby effectively reduced the peak power of pulse, realized that high energy pulse amplifies.Utilize chirped fiber grating to carry out pulse stretching, can realize full fiberize, make system configuration compact, and the broadening amount of chirped fiber grating and price are directly proportional with the length of chirped fiber grating, thus higher for the cost of the pulse stretching of large dispersion.
Summary of the invention
The present invention is that purpose provides a kind of multipass chirped fiber grating pulse broadening device that is applicable to the time explanation of wide range laser pulse, the great advantage of this device is the pulse stretching that available short chirped fiber grating is realized large dispersion, the broadening amount can freely be regulated by the number of times that the gate signal that the digit pulse delay time generator produces is controlled broadening, thereby effectively reduce cost, and realize full fiberize, compact conformation can also compensate the energy loss of broadening process.
Technical solution of the present invention is as follows:
A kind of multipass chirped fiber grating pulse broadening device; characteristics are that its formation comprises: the wide range signal source; 2*2 acousto-optic modulator, optical fiber circulator, chirped fiber grating, fibre optic isolater, gain media, wavelength division multiplexer, band pass filter, master control trigger signal source, digit pulse delay time generator, pumping protection device and pumping source, the annexation of above-mentioned component is as follows:
The first output of described master control trigger signal source links to each other with the control end of described digit pulse delay time generator, the second output of this master control trigger signal source links to each other with the control end of described wide range signal source, and the output of described digit pulse delay time generator links to each other with the control end of described 2*2 acousto-optic modulator;
The output of described wide range signal source links to each other with the first port of described 2*2 acousto-optic modulator, and the 4th port of this 2*2 acousto-optic modulator consists of an annular chamber through the 3rd port and described 2*2 acousto-optic modulator the 4th port of the second port of the first port of described optical fiber circulator and the second port, chirped fiber grating, optical fiber circulator and the 3rd port, fibre optic isolater, gain media optical fiber, wavelength division multiplexer the first port and the second port, band pass filter, 2*2 acousto-optic modulator successively by optical fiber; The second port of described 2*2 acousto-optic modulator is the output of this device;
Described pumping source links to each other with the 3rd port of described wavelength division multiplexer through described pumping protection device;
The triggering signal of the second output of described master control trigger signal source output triggers described wide range signal source and produces the wide range flashlight in the time of the first port of described 2*2 acousto-optic modulator; the triggering signal of the first output output of described master control trigger signal source triggers described digit pulse delay time generator and produces a gate signal; this gate signal is applied to the control end of described 2*2 acousto-optic modulator; described 2*2 acousto-optic modulator is opened; then the first port of this 2*2 acousto-optic modulator and the 4th port form passage; described wide range flashlight is imported in the described annular chamber by the first port and the 4th port of 2*2 acousto-optic modulator; then pass through successively the first port and second port of described optical fiber circulator; chirped fiber grating; the second port of optical fiber circulator and the 3rd port; fibre optic isolater; gain media optical fiber; band pass filter; then the 3rd port of 2*2 acousto-optic modulator imports in the annular chamber from the 4th port again; the pump light of described pumping source output is through the three port access of pumping protection device by described wavelength division multiplexer; in described gain media optical fiber, carry out pumping; described wide range flashlight is circulation broadening and amplification in the chamber; until described gate signal finishes; then described 2*2 acousto-optic modulator cuts out, and the wide range signal pulse behind the broadening is by the second port output of described 2*2 acousto-optic modulator.
Described pumping source comprises a semiconductor laser at least.
Described gain media optical fiber is er-doped, mixes the doped fiber of ytterbium or multiple rare earth ion codope, is monomode fiber, multimode fiber, large mould field optical fiber or doubly clad optical fiber.
Described pumping protection device is isolator, or sees through the filter of pumping laser wavelength.
Under the triggering of the triggering signal that described master control trigger signal source sends, described digit pulse delay time generator applies a gate signal to the control end of described 2*2 acousto-optic modulator, with the time synchronized of the unlatching that guarantees described 2*2 acousto-optic modulator and the flashlight of being inputted by described wide range signal source.
Described 2*2 acousto-optic modulator has 4 light input/output port mouths and 1 digital control port, and the first port is as input port, and the second port is as output port, and the 3rd port the 4th port connects described annular chamber.Its effect is the number of times that control impuls circulates in the chamber, sets the time of opening and the time of continuing by the digit pulse delay time generator, thus the broadening amount of control impuls.
Described optical fiber circulator guides reverse transfer light, itself and forward transmission light is separated from the space, and exported from the another port.
Described chirped fiber grating is dispersion element, for input pulse is introduced certain broadening amount.
Described fibre optic isolater prevents the reverse transfer of light signal, causes the damage of element.
Described gain media optical fiber provides amplification for system.
Described pumping source is as the pumping source of gain media.
Described pumping protection device plays buffer action, prevents that light from entering pump laser, breaks laser.
The ASE noise that described band pass filter produces when being used for the filtering amplification.
The invention has the advantages that:
1, can realize full fiberize, compact conformation is easy to adjust;
2, realize the pulse stretching of large dispersion with short chirped fiber grating, and the broadening amount can regulate freely by the number of times that the gate signal that the digit pulse delay time generator produces is controlled broadening, thereby effectively reduce cost;
3, device is with structure for amplifying, and amplifier can compensate the energy loss of broadening process, and certain gain is provided.
Description of drawings
Fig. 1 is the apparatus structure schematic diagram of multipass chirped fiber grating of the present invention pulse stretching.
Among the figure:
1-wide range signal source; The 2-2*2 acousto-optic modulator; The 3-optical fiber circulator; The 4-chirped fiber grating; The 5-fibre optic isolater; 6-gain media optical fiber; The 7-wavelength division multiplexer; The 8-band pass filter; 9-master control triggering signal; 10-digit pulse delay time generator; 11-pumping protection device; The 12-pumping source; Output pulse behind the 13-broadening.
Fig. 2 is each access diagram of 2*2 acousto-optic modulator.
Among the figure:
14-the first port, signal input part; 15-the second port, signal output part; 16-the 3rd port, annular chamber is terminal; 17-the 4th port, the annular chamber initiating terminal; The 18-control end.
Embodiment
The present invention will be further described below in conjunction with embodiment and accompanying drawing, but should not limit protection scope of the present invention with this.
See also first Fig. 1, Fig. 1 is the overall structure schematic diagram of the device of multipass chirped fiber grating of the present invention pulse stretching.As seen from the figure; the formation of multipass chirped fiber grating pulse broadening device of the present invention comprises: wide range signal source 1; 2*2 acousto-optic modulator 2, optical fiber circulator 3, chirped fiber grating 4, fibre optic isolater 5, gain media 6, wavelength division multiplexer 7, band pass filter 8, master control trigger signal source 9, digit pulse delay time generator 10, pumping protection device 11 and pumping source 12, the annexation of above-mentioned component is as follows:
The first output of described master control trigger signal source 9 links to each other with the control end of described digit pulse delay time generator 10, the second output of this master control trigger signal source 9 links to each other with the control end of described wide range signal source 1, and the output of described digit pulse delay time generator 10 links to each other with the control end of described 2*2 acousto-optic modulator 2;
The output of described wide range signal source 1 links to each other with the first port 14 of described 2*2 acousto-optic modulator 2, and the 4th port one 7 of this 2*2 acousto-optic modulator 2 consists of an annular chamber through the 3rd port one 6 and described 2*2 acousto-optic modulator 2 the 4th port one 7 of the second port 20 of the first port 19 of described optical fiber circulator 3 and the second port 20, chirped fiber grating 4, optical fiber circulator 3 and the 3rd port 21, fibre optic isolater 5, gain media optical fiber 6, wavelength division multiplexer 7 first ports and the second port, band pass filter 8,2*2 acousto-optic modulator 2 successively by optical fiber; The second port one 5 of described 2*2 acousto-optic modulator 2 is the output of this device;
Described pumping source 12 links to each other with the 3rd port of described wavelength division multiplexer 7 through described pumping protection device 11;
The triggering signal of the second output of described master control trigger signal source 9 output triggers described wide range signal source 1 and produces the wide range flashlight in the time of the first port 14 of described 2*2 acousto-optic modulator 2; the triggering signal of the first output output of described master control trigger signal source 9 triggers described digit pulse delay time generator 10 and produces a gate signal; this gate signal is applied to the control end 18 of described 2*2 acousto-optic modulator 2; described 2*2 acousto-optic modulator 2 is opened; then the first port 14 of this 2*2 acousto-optic modulator 2 and the 4th port one 7 form passage; described wide range flashlight is imported in the described annular chamber by the first port 14 and the 4th port one 7 of 2*2 acousto-optic modulator 2; then pass through successively the first port 19 and second port 20 of described optical fiber circulator 3; chirped fiber grating 4; the flashlight that returns from chirped fiber grating 4 is through the second port 20 and the 3rd port 21 of optical fiber circulator 3; fibre optic isolater 5; gain media optical fiber 6; band pass filter 8; the 3rd port one 6 of 2*2 acousto-optic modulator 2 is then again in the 4th port one 7 introduction chambers; the pump light of described pumping source 12 outputs is through the three port access of pumping protection device 11 by described wavelength division multiplexer 7; in described gain media optical fiber 6, carry out pumping; described wide range flashlight is circulation broadening and amplification in the chamber; until described gate signal finishes; then described 2*2 acousto-optic modulator 2 cuts out, and the wide range signal pulse behind the broadening is by the second port one 5 outputs of described 2*2 acousto-optic modulator 2.
Described pumping source comprises a semiconductor laser at least.
Described gain media optical fiber 6 is er-dopeds, mixes the doped fiber of ytterbium or multiple rare earth ion codope, is monomode fiber, multimode fiber, large mould field optical fiber or doubly clad optical fiber.
Described pumping protection device is isolator, or sees through the filter of pumping laser wavelength.
In an embodiment: described wide range signal source 1 is the 1053nm optical fiber mode locked laser; described gain media optical fiber 6 is Yb dosed optical fibers; wavelength division multiplexer 7 is the 980/1053nm wavelength division multiplexer; band pass filter 8 is 1053nm band pass filters; described pumping protection device 11 is 980nm filters 11, and described pumping source 12 is 980nm laser diodes.Described 2*2 acousto-optic modulator 2 can adopt Gooch﹠amp; The product of Housego company, model are MM080-1C8V22-5-F4S.3DS-B.
Referring to Fig. 2, Fig. 2 is the access diagram of 2*2 acousto-optic modulator 2.2*2 acousto-optic modulator 2 has 5 ports, and wherein the first port 14, the second port one 5, the 3rd port one 6, the 4th port one 7 are the light pulse input/output port, and port one 8 is digital control port.2*2 acousto-optic modulator 2 about and open two states, when port one 8 not during increase control signal, acousto-optic modulator is in closed condition, and light signal by 7 outputs of the 4th port one, will be exported from the second port one 5 from the signal of the 3rd port one 6 inputs after the first port 14 enters; When digit pulse delay time generator 10 loads the gate signal of one fixed width for 2*2 acousto-optic modulator 2 from port one 8, this acousto-optic modulator is in open mode, will be by 5 outputs of the second port one from the light signal that the first port 14 enters, will be by 7 outputs of the 4th port one from the light signal that the 3rd port one 6 enters, the broadening thereby assurance light circulates in the chamber, until close acousto-optic modulator after reaching required broadening amount, the flashlight behind the broadening is exported from the second port.
The course of work of the present invention is as follows:
Optical fiber mode locked laser 1 produces the wide range pulse by 9 controls of master control triggering signal and enters in the chamber from the 4th port one 7 behind the first port 14 of 2*2 acousto-optic modulator 2, given the gate signal of 2*2 acousto-optic modulator 2 one fixed widthes from port one 8 by the digit pulse delay time generator 10 of master control triggering signal 9 controls, make it stay open state, light pulse is after the port one 9 of optical fiber circulator 3 enters chirped fiber grating 4 broadenings by port 20 again in port 21 introduction chambers by optical fiber circulator 3, then pass through successively fibre optic isolater 5, Yb dosed optical fiber 6,980/1053nm wavelength division multiplexer 7,1053nm band pass filter 8, the 3rd port one 6 of 2*2 acousto-optic modulator 2 is then in the 4th port one 7 introduction chambers, light pulse circulation broadening in the chamber also amplifies until 2*2 acousto-optic modulator 2 cuts out, and the pulse behind the broadening is by the second port one 5 outputs of 2*2 acousto-optic modulator 2.The Hybrid port of above-mentioned 980/1053nm wavelength division multiplexer 7 links to each other with Yb dosed optical fiber, and the 1053nm output links to each other with the 1053nm band pass filter, and 980nm laser diode 12 is accessed by the 980nm port of wavelength division multiplexer 7 behind 980nm filter 11.Above-mentioned all devices connect by common single mode silica fiber.
Claims (4)
1. multipass chirped fiber grating pulse broadening device; be characterised in that its formation comprises: wide range signal source (1); 2*2 acousto-optic modulator (2), optical fiber circulator (3), chirped fiber grating (4), fibre optic isolater (5), gain media (6), wavelength division multiplexer (7), band pass filter (8), master control trigger signal source (9), digit pulse delay time generator (10), pumping protection device (11) and pumping source (12), the annexation of above-mentioned component is as follows:
The first output of described master control trigger signal source (9) links to each other with the control end of described digit pulse delay time generator (10), the second output of this master control trigger signal source (9) links to each other with the control end of described wide range signal source (1), and the output of described digit pulse delay time generator (10) links to each other with the control end of described 2*2 acousto-optic modulator (2);
The output of described wide range signal source (1) links to each other with first port (14) of described 2*2 acousto-optic modulator (2), the 4th port (17) of this 2*2 acousto-optic modulator (2) by optical fiber successively through the first port (19) and second port (20) of described optical fiber circulator (3), chirped fiber grating (4), second port (20) of optical fiber circulator (3) and the 3rd port (21), fibre optic isolater (5), gain media optical fiber (6), wavelength division multiplexer (7) first ports and the second port, band pass filter (8), the 3rd port (16) of 2*2 acousto-optic modulator (2) and described 2*2 acousto-optic modulator (2) the 4th port consist of an annular chamber; Second port (15) of described 2*2 acousto-optic modulator (2) is the output of this device;
Described pumping source (12) links to each other through the 3rd port of described pumping protection device (11) with described wavelength division multiplexer (7);
The triggering signal of the second output of described master control trigger signal source (9) output triggers described wide range signal source (1) and produces the wide range flashlight in the time of first port (14) of described 2*2 acousto-optic modulator (2); the triggering signal of the first output output of described master control trigger signal source (9) triggers described digit pulse delay time generator (10) and produces a gate signal; this gate signal is applied to the control end of described 2*2 acousto-optic modulator (2); described 2*2 acousto-optic modulator (2) is opened; then the first port of this 2*2 acousto-optic modulator (2) and the 4th port form passage; described wide range flashlight is imported in the described annular chamber by the first port (14) and the 4th port (17) of 2*2 acousto-optic modulator (2); then pass through successively the first port (19) and second port (20) of described optical fiber circulator (3); chirped fiber grating (4); second port (20) of optical fiber circulator (3) and the 3rd port (21); fibre optic isolater (5); gain media optical fiber (6); band pass filter (8); the 3rd port (16) of 2*2 acousto-optic modulator (2) is then again in the 4th port (17) introduction chamber; the pump light of described pumping source (12) output is through the three port access of pumping protection device (11) by described wavelength division multiplexer (7); in described gain media optical fiber (6), carry out pumping; described wide range flashlight is circulation broadening and amplification in the chamber; until described gate signal finishes; then described 2*2 acousto-optic modulator (2) cuts out, and the wide range signal pulse behind the broadening is by the second port (15) output of described 2*2 acousto-optic modulator (2).
2. a kind of multipass chirped fiber grating pulse broadening device according to claim 1 is characterized in that described pumping source comprises a semiconductor laser at least.
3. a kind of multipass chirped fiber grating pulse broadening device according to claim 1, it is characterized in that described gain media optical fiber is er-doped, mixing the doped fiber of ytterbium or multiple rare earth ion codope, is monomode fiber, multimode fiber, large mould field optical fiber or doubly clad optical fiber.
4. a kind of multipass chirped fiber grating pulse broadening device according to claim 1 is characterized in that described pumping protection device is isolator, or sees through the filter of pumping laser wavelength.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105896234A (en) * | 2016-05-03 | 2016-08-24 | 中国科学院上海光学精密机械研究所 | Micron waveband all-fiber negative-chirp output laser source |
| CN108365505A (en) * | 2018-02-02 | 2018-08-03 | 武汉安扬激光技术有限责任公司 | A kind of lossless tandem type pulse stretcher of all -fiber |
| CN109088671A (en) * | 2018-09-14 | 2018-12-25 | 国网西藏电力有限公司 | One kind is based on the distant pump Er-doped fiber transmission method of chirped bypass and system |
| CN115275741A (en) * | 2022-07-22 | 2022-11-01 | 深圳技术大学 | Pulse stretching device, pulse stretching system and laser |
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| JP2007096747A (en) * | 2005-09-29 | 2007-04-12 | Oki Electric Ind Co Ltd | Optical code division multiple transmission device |
| CN101051164A (en) * | 2006-04-06 | 2007-10-10 | 杨爱萍 | Circular chamber regulating Q optical fiber laser regenerating amplifier |
| CN101311810A (en) * | 2008-07-02 | 2008-11-26 | 中国科学院上海光学精密机械研究所 | Chirp spread laser pulse light spectrum shaping device and method |
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2012
- 2012-12-13 CN CN201210541038.0A patent/CN103001107B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007096747A (en) * | 2005-09-29 | 2007-04-12 | Oki Electric Ind Co Ltd | Optical code division multiple transmission device |
| CN101051164A (en) * | 2006-04-06 | 2007-10-10 | 杨爱萍 | Circular chamber regulating Q optical fiber laser regenerating amplifier |
| CN101311810A (en) * | 2008-07-02 | 2008-11-26 | 中国科学院上海光学精密机械研究所 | Chirp spread laser pulse light spectrum shaping device and method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105896234A (en) * | 2016-05-03 | 2016-08-24 | 中国科学院上海光学精密机械研究所 | Micron waveband all-fiber negative-chirp output laser source |
| CN108365505A (en) * | 2018-02-02 | 2018-08-03 | 武汉安扬激光技术有限责任公司 | A kind of lossless tandem type pulse stretcher of all -fiber |
| CN109088671A (en) * | 2018-09-14 | 2018-12-25 | 国网西藏电力有限公司 | One kind is based on the distant pump Er-doped fiber transmission method of chirped bypass and system |
| CN115275741A (en) * | 2022-07-22 | 2022-11-01 | 深圳技术大学 | Pulse stretching device, pulse stretching system and laser |
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