CN203617541U - Passive mode-locked picosecond laser - Google Patents
Passive mode-locked picosecond laser Download PDFInfo
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- CN203617541U CN203617541U CN201320738665.3U CN201320738665U CN203617541U CN 203617541 U CN203617541 U CN 203617541U CN 201320738665 U CN201320738665 U CN 201320738665U CN 203617541 U CN203617541 U CN 203617541U
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- 239000004038 photonic crystal Substances 0.000 claims abstract description 61
- 239000000835 fiber Substances 0.000 claims abstract description 53
- 238000005086 pumping Methods 0.000 claims abstract description 42
- 239000006096 absorbing agent Substances 0.000 claims description 16
- 239000004065 semiconductor Substances 0.000 claims description 16
- 230000035699 permeability Effects 0.000 claims description 10
- 229910052769 Ytterbium Inorganic materials 0.000 claims description 3
- 238000005253 cladding Methods 0.000 claims description 3
- 239000013307 optical fiber Substances 0.000 claims description 3
- 230000011514 reflex Effects 0.000 claims description 3
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 8
- 230000003287 optical effect Effects 0.000 abstract description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 230000003321 amplification Effects 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 229910052761 rare earth metal Inorganic materials 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000012237 artificial material Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 231100000004 severe toxicity Toxicity 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
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Abstract
The utility model relates to a passive mode-locked picosecond laser which comprises a pumping source, a photonic crystal fiber and a mode-locked output structure, wherein the optical path of the pumping source is orderly provided with a first dichroic mirror and a first aspheric lens. The pumping light emitted by the pumping source is injected into the photonic crystal fiber by the first aspheric lens. A second aspheric lens, a second dichroic mirror and the mode-locked output structure are orderly arranged behind the other end of the photonic crystal fiber. According to the passive mode-locked picosecond laser of the utility model, the passive mode-locked technology is employed, the stability is high, the photonic crystal fiber is employed, the size of the laser is small, the light conversion rate is increased, the optical pump power is reduced, the structure is simple, and the laser is convenient to use.
Description
Technical field
The utility model relates to laser technique field, is specifically related to a kind of passive mode-locking picosecond laser.
Background technology
Along with developing rapidly and the increase of application demand of laser technology, on the device of, compact conformation small and exquisite at volume, stable performance, total solids, realizing high power, high light beam quality, high efficiency, high stability and long-life laser is the developing direction of laser technology field.Demand to ultra-short pulse laser in diverse discipline and industry increases day by day, and especially application is advanced than femto-second laser picosecond laser widely, is widely used in national defence, industry, medical treatment and the field such as biological.Therefore the picosecond laser of, developing high-quality, high efficiency, high stability is this area important developing direction then.
Locked mode picosecond laser in prior art in CN03114621.X adopts dye mode-locking, electric-control system complexity, and volume is large, and dyestuff has severe toxicity, and a period of time dye-dilution, also will change; Prior art CN03210775.7 adopts active mode locking technique, and because of the limitation of guide technology development, this picosecond laser rate of finished products is low, and the poor stability of active mode locking.Given this, overcoming the existing defect of the prior art is the art problem demanding prompt solution.
Photonic crystal is that high dielectric constant medium is arranged the artificial material forming in space periodicity, and its lattice constant is the same order of magnitude with work light wave.If introduce suitable defect in this periodic structure, can in the forbidden band of photonic crystal, produce defect film, form photonic crystal resonant cavity.By suitable Resonator design, just can obtain the optical pump power of the extra small laser of size and extremely low threshold value, wherein, laser can reach micron order nano-grade size is set, and optical pump power can reach microwatt power.The use of photonic crystal contributes to further to reduce the size of laser and further reduces optical pump power.
Utility model content
The purpose of this utility model is to provide a kind of passive mode-locking picosecond laser, solves that laser volume in prior art is large, the technical problem of poor stability, use inconvenience.
The purpose of this utility model can realize by following technical measures:
A kind of passive mode-locking picosecond laser, comprise pumping source, photonic crystal fiber, locked mode export structure, wherein, in the light path of pumping source, be provided with successively the first dichroic mirror and the first non-spherical lens, the pump light of described pumping source transmitting injects photonic crystal fiber by the first non-spherical lens, after the other end of photonic crystal fiber, be provided with successively the second non-spherical lens, the second dichroic mirror and locked mode export structure, described the first dichroic mirror has high permeability for pump light, there is high reflectance for laser, described the second dichroic mirror has high permeability for laser, there is high reflectance for pump light.
Preferably, described locked mode export structure comprises flat output mirror, plano-concave mirror and semiconductor saturable absorber, described flat output mirror is semi-transparent semi-reflecting lens, reflex to described plano-concave mirror for receiving from the laser of described photonic crystal fiber and by its part, described plano-concave mirror is by the laser reflection from described flat output mirror extremely described semiconductor saturable absorber of vertical incidence.
Preferably, locked mode export structure comprises plano-concave mirror, semiconductor saturable absorber, polarizer, quarter wave plate and 45 ° of speculums, described polarizer receives the laser from described photonic crystal, and it is reflected to described plano-concave mirror through quarter wave plate, described plano-concave mirror is for receiving the laser of polarizer reflection, and reflected vertical incidence to described semiconductor saturable absorber, described 45 ° of speculums receive from described semiconductor saturable absorber reflection and through described plano-concave mirror and described quarter wave plate from described polarizer emitting laser, and reflect as exporting.
Preferably, described photonic crystal fiber is for mixing ytterbium multicore photonic crystal optical fiber.
Preferably, this passive mode-locking picosecond laser also comprises focus lamp, and described focus lamp is located at the pump light sending for assembling described pumping source between described pumping source and described the first dichroic mirror.
Preferably, the core diameter of described photonic crystal fiber is 50 μ m, and the pumping cladding diameter of described photonic crystal fiber is 200 μ m.
Compared with prior art, the beneficial effects of the utility model are, passive mode-locking picosecond laser employing passive mode locking technology of the present utility model, and stability is high; Passive mode-locking picosecond laser of the present utility model adopts photonic crystal fiber, and laser volume is little, and light conversion ratio increases, and optical pump power reduces; Passive mode-locking picosecond laser of the present utility model is simple in structure, easy to use.
Accompanying drawing explanation
Fig. 1 is the structural representation of the passive mode-locking picosecond laser of the utility model embodiment 1;
Fig. 2 is the structural representation of the passive mode-locking picosecond laser of the utility model embodiment 2.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
The utility model embodiment provides a kind of passive mode-locking picosecond laser, comprise pumping source, photonic crystal fiber, locked mode export structure, wherein, in the light path of pumping source, be provided with successively the first dichroic mirror and the first non-spherical lens, the pump light of described pumping source transmitting injects photonic crystal fiber by the first non-spherical lens, after the other end of photonic crystal fiber, be provided with successively the second non-spherical lens, the second dichroic mirror and locked mode export structure, described the first dichroic mirror has high permeability for pump light, there is high reflectance for laser, described the second dichroic mirror has high permeability for laser, there is high reflectance for pump light.
Particularly, passive mode-locking picosecond laser of the present utility model adopts passive mode locking technology, and stability is high; Passive mode-locking picosecond laser of the present utility model adopts photonic crystal fiber, and laser volume is little, and light conversion ratio increases, and optical pump power reduces; Passive mode-locking picosecond laser of the present utility model is simple in structure, easy to use.
embodiment 1
The utility model embodiment 1 provides a kind of passive mode-locking picosecond laser, as shown in Figure 1, this passive mode-locking picosecond laser comprises: pumping source 1, focus lamp 2, the first dichroic mirror 3, the first non-spherical lens 4, photonic crystal fiber 5, the second non-spherical lens 6, the second dichroic mirror 7 and locked mode export structure.
Wherein, one end that pumping source 1 is located at photonic crystal fiber 5 is for carrying out pumping to it; Focus lamp 2 is placed between pumping source 1 and photonic crystal fiber 5 and assembles from the pump light of pumping source 1 for making, and improves pump light utilance.In the light path of pumping source 1, be also provided with successively the first dichroic mirror 3 and the first non-spherical lens 4, the pump light that pumping source 1 is launched injects photonic crystal fiber 5 by the first non-spherical lens 4, after the other end of photonic crystal fiber 5, be provided with successively the second non-spherical lens 6, the second dichroic mirror 7 and locked mode export structure, the first dichroic mirror 3 has high permeability, has high reflectance for laser for pump light, and the second dichroic mirror 7 has high permeability, has high reflectance for pump light for laser.
The pump light that pumping source 1 sends impinges perpendicularly on focus lamp 2, after focusing on, it sees through the first dichroic mirror 3, again assemble and incide photonic crystal fiber 5 it is carried out to pumping through the first non-spherical lens 4 again, photonic crystal fiber 5 absorptive pumping light energies, form population inversion, excited radiation light shakes amplification in resonant cavity, Output of laser while reaching output threshold value, the airport of two end faces of photonic crystal fiber 5 is subsided by heat sealing machine electrion, and be polished into certain angle, suppress from agitating and end face feedback effect thereby play, further, regulate the position of photonic crystal fiber 5, be located at the focus of the first non-spherical lens 4, the coupling efficiency of pump light reaches the highest.The other end of photonic crystal fiber 5, laser, by the second non-spherical lens 6 and the second dichroic mirror 7, carries out locked mode output by locked mode export structure.
In the present embodiment, locked mode export structure comprises plano-concave mirror 8, semiconductor saturable absorber 9, polarizer 10, 11 and 45 ° of speculums 12 of quarter wave plate, its placement location can utilize laser to demarcate, polarizer 10 receives the laser from photonic crystal fiber 5, and it is reflected to plano-concave mirror 8 through quarter wave plate 11, the laser that plano-concave mirror 8 reflects for receiving polarizer 10, and reflected vertical incidence to semiconductor saturable absorber 9, 45 ° of speculums 12 receive from semiconductor saturable absorber 9 reflect and through plano-concave mirror 8 and quarter wave plate 11 from polarizer 10 emitting lasers, and reflected as output.It will be appreciated by those skilled in the art that arranging of locked mode export structure can appropriate change, as long as can realize the locked mode output of laser.
The passive mode-locking picosecond laser of the present embodiment, has increased light conversion efficiency, has greatly shortened chamber length and volume, and the structure of laser is compacter.
The utility model embodiment 2 provides a kind of passive mode-locking picosecond laser, as shown in Figure 2, this passive mode-locking picosecond laser comprises: pumping source 1, focus lamp 2, the first dichroic mirror 3, the first non-spherical lens 4, photonic crystal fiber 5, the second non-spherical lens 6, the second dichroic mirror 7 and locked mode export structure.
In the present embodiment, the arrangement of pumping source 1, focus lamp 2, the first dichroic mirror 3, the first non-spherical lens 4, photonic crystal fiber 5, the second non-spherical lens 6, the second dichroic mirror 7 is identical with embodiment 1, and pumping source 1 is located at one end of photonic crystal fiber 5 for it is carried out to pumping; Focus lamp 2 is placed between pumping source 1 and photonic crystal fiber 5 and assembles from the pump light of pumping source 1 for making, and improves pump light utilance.In the light path of pumping source 1, be also provided with successively the first dichroic mirror 3 and the first non-spherical lens 4, the pump light that pumping source 1 is launched injects photonic crystal fiber 5 by the first non-spherical lens 4, after the other end of photonic crystal fiber 5, be provided with successively the second non-spherical lens 6, the second dichroic mirror 7 and locked mode export structure, the first dichroic mirror 3 has high permeability, has high reflectance for laser for pump light, and the second dichroic mirror 7 has high permeability, has high reflectance for pump light for laser.
The pump light that pumping source 1 sends impinges perpendicularly on focus lamp 2, after focusing on, it sees through the first dichroic mirror 3, again assemble and incide photonic crystal fiber 5 it is carried out to pumping through the first non-spherical lens 4 again, photonic crystal fiber 5 absorptive pumping light energies, form population inversion, excited radiation light shakes amplification in resonant cavity, Output of laser while reaching output threshold value, the airport of two end faces of photonic crystal fiber 5 is subsided by heat sealing machine electrion, and be polished into certain angle, suppress from agitating and end face feedback effect thereby play, further, regulate the position of photonic crystal fiber 5, be located at the focus of the first non-spherical lens 4, the coupling efficiency of pump light reaches the highest.The other end of photonic crystal fiber 5, laser, by the second non-spherical lens 6 and the second dichroic mirror 7, carries out locked mode output by locked mode export structure.
Locked mode export structure is different from embodiment 1, and the locked mode export structure of the present embodiment comprises flat output mirror 13, plano-concave mirror 8 and semiconductor saturable absorber 9, and its placement location can utilize laser to demarcate.Above-mentioned demarcation is just as a kind of mode of determining flat output mirror 13, plano-concave mirror 8 and semiconductor saturable absorber 9 positions, those skilled in the art are to be understood that, arranging of locked mode export structure can appropriate change, as long as can realize the locked mode output of laser.
The passive mode-locking picosecond laser of the present embodiment adopts passive mode locking technology, and stability is high; The passive mode-locking picosecond laser of the present embodiment adopts photonic crystal fiber, and laser volume is little, and light conversion ratio increases, and optical pump power reduces; The passive mode-locking picosecond laser of the present embodiment is simple in structure, easy to use; The locked mode export structure of the passive mode-locking picosecond laser of the present embodiment adopts doubleway output light to can be used for realizing flashlight amplification, obtains double-frequency laser output.
The above embodiment of the present utility model, does not form the restriction to the utility model protection range.Any various other corresponding changes and distortion of making according to technical conceive of the present utility model, all should be included in the protection range of the utility model claim.
Claims (6)
1. a passive mode-locking picosecond laser, comprise pumping source, photonic crystal fiber, locked mode export structure, it is characterized in that, in the light path of pumping source, be provided with successively the first dichroic mirror and the first non-spherical lens, the pump light of described pumping source transmitting injects photonic crystal fiber by the first non-spherical lens, after the other end of photonic crystal fiber, be provided with successively the second non-spherical lens, the second dichroic mirror and locked mode export structure, described the first dichroic mirror has high permeability for pump light, there is high reflectance for laser, described the second dichroic mirror has high permeability for laser, there is high reflectance for pump light.
2. passive mode-locking picosecond laser according to claim 1, it is characterized in that, described locked mode export structure comprises flat output mirror, plano-concave mirror and semiconductor saturable absorber, described flat output mirror is semi-transparent semi-reflecting lens, reflex to described plano-concave mirror for receiving from the laser of described photonic crystal fiber and by its part, described plano-concave mirror is by the laser reflection from described flat output mirror extremely described semiconductor saturable absorber of vertical incidence.
3. passive mode-locking picosecond laser according to claim 1, it is characterized in that, locked mode export structure comprises plano-concave mirror, semiconductor saturable absorber, polarizer, quarter wave plate and 45 ° of speculums, described polarizer receives the laser from described photonic crystal fiber, and it is reflected to described plano-concave mirror through quarter wave plate, described plano-concave mirror is for receiving the laser of polarizer reflection, and reflected vertical incidence to described semiconductor saturable absorber, described 45 ° of speculums receive from described semiconductor saturable absorber reflection and through described plano-concave mirror and described quarter wave plate from described polarizer emitting laser, and reflected as output.
4. according to the passive mode-locking picosecond laser described in claims 1 to 3 any one, it is characterized in that, described photonic crystal fiber is for mixing ytterbium multicore photonic crystal optical fiber.
5. according to the passive mode-locking picosecond laser described in claims 1 to 3 any one, it is characterized in that, also comprise focus lamp, described focus lamp is located at the pump light sending for assembling described pumping source between described pumping source and described the first dichroic mirror.
6. passive mode-locking picosecond laser according to claim 4, is characterized in that, the core diameter of described photonic crystal fiber is 50 μ m, and the pumping cladding diameter of described photonic crystal fiber is 200 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201320738665.3U CN203617541U (en) | 2013-11-21 | 2013-11-21 | Passive mode-locked picosecond laser |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320738665.3U CN203617541U (en) | 2013-11-21 | 2013-11-21 | Passive mode-locked picosecond laser |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022000419A1 (en) * | 2020-07-02 | 2022-01-06 | 华为技术有限公司 | Laser system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022000419A1 (en) * | 2020-07-02 | 2022-01-06 | 华为技术有限公司 | Laser system |
| CN114982077A (en) * | 2020-07-02 | 2022-08-30 | 华为技术有限公司 | Laser system |
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Granted publication date: 20140528 |