CN103219639A - Pulse fiber laser of fiber bragg grating modulation Q - Google Patents
Pulse fiber laser of fiber bragg grating modulation Q Download PDFInfo
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- CN103219639A CN103219639A CN2013101684386A CN201310168438A CN103219639A CN 103219639 A CN103219639 A CN 103219639A CN 2013101684386 A CN2013101684386 A CN 2013101684386A CN 201310168438 A CN201310168438 A CN 201310168438A CN 103219639 A CN103219639 A CN 103219639A
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Abstract
The invention discloses a pulse fiber laser of fiber bragg grating modulation Q. The pulse fiber laser comprises a fixed wavelength fiber bragg grating (101), a tunable fiber bragg grating (102), an active mixing double-clad fiber (103), a pumping semiconductor laser (104), a fiber pumping photosynthetic bundle device (105), a pumping drive circuit (106), a piezoelectric ceramic or magnetostriction drive circuit (107), a main control circuit (108) and an interface circuit (109), and is characterized in that the tunable fiber bragg grating (102) is connected with the external drive circuit (107), the tunable fiber bragg grating (102) is compressed or stretched so as to change a reflection central wavelength under the action the external drive circuit (107), and the reflection central wavelength of the tunable fiber bragg grating (102) and the wavelength of the other fixed wavelength fiber bragg grating (101) are overlapped and mismatched, thus the pulse fiber laser sends out periodic pulse laser output. The pulse fiber laser provided by the invention has the advantages that the full one-dimensional fiber of an optical element is realized, the coupling loss is reduced, and the system stability is improved.
Description
Technical field
The present invention relates to a kind of pulse optical fiber, particularly fiber grating is transferred the pulse optical fiber of Q.
Background technology
In fields such as material surface mark, engraving, scientific experiment, pulse laser is widely used.Wherein Q-switched laser obtains a large amount of employings because utensil structure is simple, stable performance, lower-cost advantage in pulse laser.But blemish in an otherwise perfect thing is, the Q switched element in the existing Q impulse fiber laser adopts the acousto-optic crystal material usually, and volume is big, and two ends need increase optical alignment could send into light signal and send optical fiber.How become a difficult point of pulse optical fiber with the modulator of full fiber optic materials.Have only the modulator that the adopted full optical fiber Q switched element as pulse laser, could realize the full fiberize of light path of pulse optical fiber, reach the integrated effect of optics one dimension, this will improve the whole efficiency and the stability of a system of light path effectively.
Summary of the invention
At the deficiencies in the prior art, the present invention proposes the pulse optical fiber that a kind of fiber grating is transferred Q, this laser adopts tunable fiber grating as Q switched element, realizes the full fiberize of light path of pulse optical fiber, improves the terseness and the stability of light path.
The technical solution used in the present invention is: a kind of fiber grating is transferred the pulse optical fiber of Q, comprising: fixed wave length fiber grating, tunable fiber grating, active doping double-cladding optical fiber, pumping semiconductor laser, pumped fiber combiner device, pumping drive circuit, piezoelectric ceramic or magnetostriction drive circuit, main control circuit and interface circuit; Fixed wave length fiber grating and tunable fiber grating form two speculums of fiber laser, tunable fiber grating is encapsulated on piezoelectric ceramic or the magnetostrictive material, it is characterized in that: be connected with external drive circuit on the described tunable fiber grating, externally under the effect of drive circuit, compression takes place or stretches to change its reflection kernel wavelength, the overlapping and mismatch with the wavelength of another fixed wave length fiber grating in tunable fiber grating; Make pulse optical fiber send periodic pulse laser output.
Described tunable fiber grating compresses relatively or amount of tension is 0.5～5% of a fiber grating length overall, causes that correspondingly reflection kernel wavelength change amount is 0.5～5%.
Cycle fiber gratings such as described tunable fiber grating employing encapsulate on piezoelectric ceramic or magnetostrictive material and form.
The centre wavelength of the centre wavelength of described tunable fiber grating and fixed wave length fiber grating is overlapping, and the loss minimum of laser cavity takes place to swash and penetrates; The centre wavelength mismatch of the centre wavelength of tunable fiber grating and fixed wave length fiber grating, the loss of laser cavity increases, and swashs to penetrate to stop.
Beneficial effect of the present invention: by being encapsulated in the fiber grating on piezoelectric ceramic or the magnetostrictive material, externally tuning wherein cardiac wave is long under the effect of drive circuit, the centre wavelength that causes this tunable fiber grating is the overlapping and mismatch with the wavelength of another fixed wave length fiber grating periodically, thereby reaches the laser output of recurrent pulses.This laser structure has been realized the full one-dimension optical-fiberization of optical element, has reduced coupling loss, has improved the stability of a system.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present invention.
Fig. 2 is the distortion situation under fiber grating compression (or tension stress release condition) and the action of pulling stress.
Fig. 3 is the reflectance spectrum curve of the fiber grating of the fiber grating of tunable wavelength and fixed wave length.
Fig. 4 is the fiber grating of the tunable wavelength after the magnetostrictive material encapsulation.
Among the figure: 101 fixed wave length fiber gratings, 102 tunable fiber gratings, 103 active doping optical fibres, 104 pumping semiconductor lasers, 105 optical-fiber bundling devices, 106 pump laser drive circuits, the drive circuit of 107 piezoelectric ceramic or magnetostrictive material, 108 main control circuits, 109 interface circuits, fiber grating under the 102-a compressive stress state, fiber grating under the 102-b tensile stress state, the reflectance spectrum of 301 fixed wave length fiber gratings, the reflectance spectrum of 302 tunable fiber gratings, reflectance spectrum under the 303 tensile stress states, 102-1 has the optical fiber of fiber grating, 102-2 magnetostrictive material pipe, the 102-3 current coil, the 102-4 fiber grating.
Embodiment
Know by Fig. 1, a kind of fiber grating is transferred the pulse optical fiber of Q, by fixed wave length fiber grating 101, tunable fiber grating 102, active doping double-cladding optical fiber 103, pumping semiconductor laser 104, pumped fiber combiner device 105, fibre optic isolater and collimater, pumping drive circuit 106, piezoelectric ceramic or magnetic telescopic driver 107, main control circuit 108 and interface circuit 109 are formed, fixed wave length fiber grating 101 and tunable fiber grating 102 form two speculums of fiber laser, tunable fiber grating 102 is encapsulated on piezoelectric ceramic or the magnetostrictive material, be connected with piezoelectric ceramic or magnetic telescopic driver 107 on the described tunable fiber grating 102, piezoelectric ceramic or magnetic telescopic driver 107 compression 102-a or stretching 102-b tunable fiber grating 102 can change the reflection kernel wavelength of tunable fiber grating 102, make the overlapping and mismatch of wavelength of fiber grating 102 and another fixed wave length fiber grating 101; Make pulse optical fiber send periodic pulse laser output.Cycle fiber gratings such as described tunable fiber grating 102 employings encapsulate on piezoelectric ceramic or magnetostrictive material and form.The centre wavelength of the centre wavelength of tunable fiber grating 102 and fixed wave length fiber grating 101 is overlapping, and the loss minimum of laser cavity takes place to swash and penetrates; The centre wavelength mismatch of the centre wavelength of tunable fiber grating 102 and fixed wave length fiber grating 101, the loss of laser cavity increases, and swashs to penetrate to stop.
In the present embodiment, the 10/130 micron double clad Yb+ doping double-cladding Active Optical Fiber 103 that uses 6～10 meters of length is as the main fiber ring, with the fixed wave length fiber grating 101 of centre wavelength 1064 nanometers, foveal reflex rate 95%, bandwidth 1～2 nanometer as the left side speculum.With another centre wavelength 1064 nanometers, the tunable fiber grating 102 of foveal reflex rate 30%, bandwidth 1～2 nanometer is as the right side speculum.Fixed wave length fiber grating 101 usefulness common modes encapsulate, tunable fiber grating 102 encapsulation are fixed among the magnetostrictive material pipe 102-2, current coil 102-3 outside the magnetostrictive material pipe is encouraged by the drive circuit 107 of piezoelectric ceramic or magnetostrictive material, makes tunable fiber grating 102 generating period crustal extensions.Pumping semiconductor laser 104 with a plurality of wavelength 915 nanometers is fused on the pumped fiber combiner device 105, pumped fiber combiner device 105 again with fixed wave length fiber grating 101 and active doping optical fibre 103 weldings.
Being known by Fig. 2, is the distortion situation under fiber grating compression (or tension stress release condition) and the action of pulling stress.When tunable fiber grating 102 under the effect of piezoelectric ceramic or magnetic telescopic driver 107, when stretching 102-b took place, the spacing of adjacent stripes just became big in the fiber grating.This just causes the foveal reflex wavelength of fiber grating elongated.Otherwise under the effect of piezoelectric ceramic or magnetic telescopic driver 107, when compression 102-a took place, the spacing of adjacent stripes had just diminished in the fiber grating.This just causes the foveal reflex wavelength of fiber grating to diminish.So periodically stretch and compress fiber grating, just can make wherein the cardiac wave long hair give birth to periodic tunning effect.Tunable fiber grating 102 compresses relatively or amount of tension is 0.5～5% of a fiber grating length overall, causes that correspondingly reflection kernel wavelength change amount is 0.5～5%.As for centre wavelength being 1 micron laser output, the maximum wavelength variable quantity that Compression and Expansion causes is 5～50 nanometers.
By shown in Figure 3.It is the reflectance spectrum curve of the fiber grating of the fiber grating of tunable wavelength and fixed wave length.When taking place to stretch, the spacing of adjacent stripes just becomes big in the fiber grating.This just causes the foveal reflex wavelength of fiber grating elongated, realized the reflectance spectrum 303 under the tensile stress state, otherwise, compression takes place the time, the spacing of adjacent stripes has just diminished in the fiber grating, this just causes the foveal reflex wavelength of fiber grating to diminish, the reflectance spectrum 302 of tunable fiber grating as shown in the figure, so periodically stretch and compress fiber grating, just can make wherein the cardiac wave long hair give birth to periodic tunning effect, overlap or mismatch with the reflectance spectrum 301 of fixed wave length fiber grating.
Among the present invention, the fixed wave length fiber grating 101 on the left of having and the tunable fiber grating 102 on right side have constituted jointly the resonant cavity of laser.The fiber grating on right side is because experience periodic wavelength change, and when its wavelength overlapped with the optic fiber grating wavelength in left side, laser generation resonance was exported laser.The peak value size of output laser pulse, pulsewidth can be subjected to the influence of pump power size and wavelength tuning speed and frequency.
Being known by Fig. 4, is the fiber grating of the tunable wavelength after the magnetostrictive material encapsulation.Form by the optical fiber 102-1 that has fiber grating, magnetostrictive material pipe 102-2, current coil 102-3 and 102-4 fiber grating.The optical fiber 102-1 that will have fiber grating is encapsulated in the endoporus of magnetostrictive material pipe 102-2, the logical electric current of going up among the current coil 102-3 around, and making has axial magnetic field on the magnetostrictive material.Under the effect in magnetic field, magnetostrictive material can take place to stretch or shrink, and this just causes the stretching or the contraction of fiber grating, thereby has changed the foveal reflex wavelength of fiber grating.
Core of the present invention is to adopt piezoelectric ceramic or magnetostrictive material to carry out the wavelength regulation of fiber grating, makes fiber laser send periodic pulse laser output.The packing forms of fiber grating can spirit according to the present invention be made multi-form embodiment.All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (4)
1. the pulse optical fiber of a fiber grating accent Q comprises: fixed wave length fiber grating (101), tunable fiber grating (102), active doping double-cladding optical fiber (103), pumping semiconductor laser (104), pumped fiber combiner device (105), pumping drive circuit (106), piezoelectric ceramic or magnetostriction drive circuit (107), main control circuit (108) and interface circuit (109); Fixed wave length fiber grating (101) and tunable fiber grating (102) form two speculums of fiber laser, tunable fiber grating (102) is encapsulated on piezoelectric ceramic or the magnetostrictive material, it is characterized in that: be connected with external drive circuit (107) on the described tunable fiber grating (102), externally under the effect of drive circuit (107), compression takes place or stretches to change its reflection kernel wavelength, with the overlapping and mismatch of wavelength of another fixed wave length fiber grating (101) in tunable fiber grating (102); Make pulse optical fiber send periodic pulse laser output.
2. a kind of fiber grating according to claim 1 is transferred the pulse optical fiber of Q, it is characterized in that: described tunable fiber grating (102) compresses relatively or amount of tension is 0.5～5% of a fiber grating length overall, causes that correspondingly its reflection kernel wavelength change amount is 0.5～5%.
3. a kind of fiber grating according to claim 1 is transferred the pulse optical fiber of Q, and it is characterized in that: cycle fiber gratings such as described tunable fiber grating (102) employing encapsulate on piezoelectric ceramic or magnetostrictive material and form.
4. a kind of fiber grating according to claim 1 is transferred the pulse optical fiber of Q, it is characterized in that: the centre wavelength of the centre wavelength of described tunable fiber grating (102) and fixed wave length fiber grating (101) is overlapping, the loss minimum of laser cavity takes place to swash and penetrates; The centre wavelength mismatch of the centre wavelength of tunable fiber grating (102) and fixed wave length fiber grating (101), the loss of laser cavity increases, and swashs to penetrate to stop.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474867A (en) * | 2013-08-13 | 2013-12-25 | 江苏天元激光科技有限公司 | Large-mode-area high-power fiber laser device |
| CN104466636A (en) * | 2014-11-30 | 2015-03-25 | 华南理工大学 | Single-frequency Q-switched pulsed fiber laser |
| CN105098578A (en) * | 2015-06-19 | 2015-11-25 | 深圳联品激光技术有限公司 | Optical fiber resonant cavity, fabrication method thereof and optical fiber laser |
| CN109004501A (en) * | 2018-07-20 | 2018-12-14 | 中国科学院合肥物质科学研究院 | A kind of high stable tunable single longitudinal mode circular cavity optic fibre laser |
| CN113300198A (en) * | 2021-05-14 | 2021-08-24 | 江苏师范大学 | Single-frequency narrow-linewidth distributed feedback pulse fiber laser and implementation method thereof |
| CN114094445A (en) * | 2022-01-11 | 2022-02-25 | 武汉锐科光纤激光技术股份有限公司 | Light beam processor |
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2013
- 2013-05-08 CN CN2013101684386A patent/CN103219639A/en active Pending
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474867A (en) * | 2013-08-13 | 2013-12-25 | 江苏天元激光科技有限公司 | Large-mode-area high-power fiber laser device |
| CN104466636A (en) * | 2014-11-30 | 2015-03-25 | 华南理工大学 | Single-frequency Q-switched pulsed fiber laser |
| CN105098578A (en) * | 2015-06-19 | 2015-11-25 | 深圳联品激光技术有限公司 | Optical fiber resonant cavity, fabrication method thereof and optical fiber laser |
| CN109004501A (en) * | 2018-07-20 | 2018-12-14 | 中国科学院合肥物质科学研究院 | A kind of high stable tunable single longitudinal mode circular cavity optic fibre laser |
| CN113300198A (en) * | 2021-05-14 | 2021-08-24 | 江苏师范大学 | Single-frequency narrow-linewidth distributed feedback pulse fiber laser and implementation method thereof |
| CN113300198B (en) * | 2021-05-14 | 2023-12-01 | 江苏师范大学 | Single-frequency narrow linewidth distributed feedback pulse fiber laser and implementation method thereof |
| CN114094445A (en) * | 2022-01-11 | 2022-02-25 | 武汉锐科光纤激光技术股份有限公司 | Light beam processor |
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Application publication date: 20130724 |