CN103441416A - Liquid saturable absorber mode locking optical fiber laser - Google Patents
Liquid saturable absorber mode locking optical fiber laser Download PDFInfo
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- CN103441416A CN103441416A CN2013103793551A CN201310379355A CN103441416A CN 103441416 A CN103441416 A CN 103441416A CN 2013103793551 A CN2013103793551 A CN 2013103793551A CN 201310379355 A CN201310379355 A CN 201310379355A CN 103441416 A CN103441416 A CN 103441416A
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Abstract
The invention relates to a liquid saturable absorber mode locking optical fiber laser, and belongs to the technical field of optical fiber lasers. According to the liquid saturable absorber mode locking optical fiber laser, a liquid saturable absorber is utilized to serve as a mold locking element, so picosecond or femtosecond ultrashort pulse outputting is achieved. According to the technical scheme, an annular laser resonant cavity is adopted, the resonant cavity is formed by a pumping source, a wavelength division multiplexer, a gain optical fiber, a single mode optical fiber, an isolator, a liquid saturable absorption device and an output coupler, and the liquid saturable absorption device is formed by a liquid saturable absorber and an optical fiber connecting container. The liquid saturable absorber mode locking optical fiber laser is characterized in that a carbon nanotube or grapheme is adopted in the liquid saturable absorption device to serve as a saturable absorption material, and the saturable absorption material is mixed into distilled water or heavy water to serve as the saturable absorber. The saturable absorption material has mobility in liquid, and the liquid has radiation effects on the material. Therefore, the mode locking optical fiber can work stably under high power for a long time.
Description
Technical field
The present invention relates to liquid saturable absorber mode locked fiber laser, belong to the fiber laser technology field.
Background technology
Ultra-short pulse laser has a wide range of applications in fields such as ultrafast optics, super continuous spectrums generation, communication, bio-imagings.The passive mode locking technology is one of Main Means produced ultrashort pulse.Up to the present, the passive mode locking of full fiberize can be divided into following a few class: saturable absorber locked mode, nonlinear polarization rotation locked mode, nonlinear optics annular chamber locked mode.Wherein, the saturable absorber locked mode has the advantages such as cost is low, simple in structure, easy adjusting, and this makes it have commercial value widely.Semiconductor saturable absorbing mirror, carbon nano-tube, Graphene are the three class saturable absorbers that are most widely used at present.At present, this three classes saturable absorber is all the form appearance with solid in mode locked fiber laser.When mode-locked laser is operated in high power, the saturable absorber of this class solid is very easily destroyed.In report, in the fiber laser that typical transmission-type carbon class saturable absorber is the locked mode device, general power output is the 3-5 milliwatt.This has greatly limited saturable absorber and has applied in mode-locked laser.Based on this kind of situation, we have designed liquid saturable absorber mode locked fiber laser.So-called liquid saturable absorber refers to the saturable absorption material is blended in liquid, and then produces the saturable absorber of liquid.The saturable absorption material is in the suspension flow regime in liquid, and this power output by fiber laser is brought up to 300 milliwatts.This generation for high power passive mode locking laser provides new approach.
Summary of the invention
The object of the present invention is to provide a kind of mode locked fiber laser of liquid saturable absorber as the locked mode element that utilize, realize the ultrashort pulse output of psec or femtosecond.
To achieve these goals, the present invention has taked following technical scheme: liquid saturable absorber mode locked fiber laser, it is characterized in that: comprise loop laser resonance cavity, resonant cavity is by pumping source, wavelength division multiplexer, gain fibre, monomode fiber, isolator, liquid saturable absorption device, output coupler, wherein, liquid saturable absorption device is comprised of liquid saturable absorber and optical fiber connecting container, described liquid saturable absorption device adopts carbon nano-tube, Graphene, graphene oxide is the saturable absorption material, above saturable absorption material is blended in liquid as saturable absorption solution, described liquid selective water or heavy water, described optical fiber connecting container comprises liquid-circulating container, optical fiber transient nozzles, fiber clamp, translation stage,
Two coaxial placements of optical fiber transient nozzles, spacing is that the 20-50 micron guarantees to be full of saturable absorption liquid between the two; Optical fiber transient nozzles one end is horn-like, the convenient center that optical fiber is imported to transient nozzles, center is passage, the diameter of micro channel is identical with standard single-mode fiber, effect is to hold monomode fiber, and two section single-mould fibers are coaxial docking in the liquid saturable absorber by optical fiber transient nozzles 10; Fiber clamp is fixed on the translation stage of the distance for changing two ends optical fiber.
Further, described liquid saturable absorber mode locked fiber laser is characterized in that: described pump light source is the semiconductor laser of 970-980nm wavelength; Gain fibre is erbium-doped fiber; The isolator bandwidth is 1540-1580nm; The output of output coupler is than being 3%-97%; The heavy aqueous solution of the carbon nano-tube that saturable absorption liquid is mass ratio 0.05%-20% or Graphene or graphene oxide, obtain near the laser pulse of wavelength 1500-1600nm.
Further, described liquid saturable absorber mode locked fiber laser is characterized in that: described pump light source is the semiconductor laser of 970-980nm wavelength; Gain fibre is Yb dosed optical fiber; The isolator bandwidth is 900-1100nm; The output of output coupler is than being 3%-97%; The aqueous solution of the carbon nano-tube that saturable absorption liquid is mass ratio 0.05%-20% or Graphene or graphene oxide or heavy aqueous solution, obtain near the laser pulse of wavelength 900-1150nm.
Described pump light source is the semiconductor laser of 970-980nm wavelength; Gain fibre is erbium-doped fiber; The isolator bandwidth is 1540-1580nm; The output of output coupler is than being 3%-97%; The carbon nano-tube that the liquid saturable absorber is mass ratio 0.05%-20% (or Graphene, graphene oxide) heavy aqueous solution.Above-described carbon nano-tube (or Graphene, graphene oxide) is the saturable absorption material, and heavy aqueous solution provides liquid environment.So because 1.5 micron waveband water absorption losss be far longer than heavy water use only heavy aqueous solution at this wave band.Above device is formed to ring resonator.By design chamber internal dispersion and adjusting Polarization Controller, can obtain near the laser pulse of wavelength 1500-1600nm.
Described liquid saturable absorber mode locked fiber laser is characterized in that: described pump light source is the semiconductor laser of 970-980nm wavelength; Gain fibre is Yb dosed optical fiber; The isolator bandwidth is 900-1100nm; The output of output coupler is than being 3%-97%; The carbon nano-tube that saturable absorption liquid is mass ratio 0.05%-20% (or Graphene, graphene oxide) water (or heavy water) solution.Above-described carbon nano-tube (or Graphene, graphene oxide) is the saturable absorption material, and water (or heavy water) solution provides liquid environment.So because be much the samely both can use in the absorption loss of 1 micron waveband water and heavy water.By design chamber internal dispersion and adjusting Polarization Controller, can obtain near the laser pulse of wavelength 900-1150nm.
Good effect of the present invention: by existing saturable absorption material as: the materials such as carbon nano-tube, Graphene, graphene oxide are prepared into liquid saturable absorption device, realize mode locking pulse output; In the carbon nano-tube of reporting at present, Graphene, graphene oxide mode-locked laser, the locked mode device is all that the form with solid occurs, in this case, laser is radiated at the same position of locked mode device for a long time.Thereby, make the life-span of mode-locked laser greatly reduce.In addition, the radiating effect of solid locked mode device is poor, and this has just limited the power output of mode-locked laser.To be replaced by liquid locked mode device during traditional solid locked mode in the present invention, there are the advantages such as good fluidity, rapid heat dissipation due to the liquid saturable absorber and make mode-locked laser there is the advantages such as long-life, high power.
The accompanying drawing explanation
Fig. 1 is the liquid saturable absorber mode locked fiber laser in the present invention;
Fig. 2 is liquid saturable absorption device structure chart;
In figure: 1, pump light source, 2, wavelength division multiplexer, 3, gain fibre, 4, isolator, 5, liquid saturable absorption device, 6, monomode fiber, 7, output coupler, 8, Polarization Controller 9, liquid saturable absorption solution, 10, optical fiber transient nozzles, 11, optical fiber, 12, fiber clamp, 13, translation stage 14, liquid container.15, miniature peristaltic pump.
Embodiment
Below in conjunction with accompanying drawing 1-2 and some embodiment, the present invention is described in detail:
As shown in Figure 1, liquid saturable absorber mode locked fiber laser of the present invention comprises: pump light source 1, wavelength division multiplexer 2, gain fibre 3, isolator 4, liquid saturable absorption device 5, monomode fiber 6, output coupler 7, Polarization Controller 8.Described liquid saturable absorption device as shown in Figure 2, mainly comprises: liquid saturable absorption solution 9, optical fiber transient nozzles 10, optical fiber 11, fiber clamp 12, translation 13, liquid container 14, miniature peristaltic pump 15.Described liquid saturable absorption device is characterized as: two coaxial placements of optical fiber transient nozzles, and spacing is that 50 microns assurances are full of saturable absorption liquid between the two; Optical fiber transient nozzles one end is horn-like, the convenient center that optical fiber is imported to transient nozzles, center is the micro channel that diameter is 125 microns, the diameter of micro channel is identical with standard single-mode fiber, effect is to hold monomode fiber, and two section single-mould fibers 11 are coaxial docking in the liquid saturable absorber by optical fiber transient nozzles 10.In addition, the distance of two ends optical fiber be can change by regulating translation 13, thereby loss and the modulation depth of saturable absorber regulated.Thereby make laser obtain the pulse laser of different in width.Miniature peristaltic pump 15 can keep the mobility of liquid saturable absorber.
The operation principle of described liquid saturable absorber mode locked fiber laser is: in pump light source 1 is coupled into gain fibre 3 by wavelength division multiplexer 2, excitation gain optical fiber 3 forms population inversion, produce fluorescence thereby make in optical fiber, fluorescence can unidirectional vibration form laser through the effect of isolator 4 in ring resonator.Form pulse during laser undercoating liquid saturable absorption device 4 under the adjusting of saturable absorption effect.Be able to stable operation under the acting in conjunction of the non-linear and dispersion of pulse in laser.Finally, pulsed light is by output coupler 7 coupling outputs.In described liquid saturable absorber, the spacing of two optical fiber is relevant with strength of fluid, and strength of fluid is larger, and spacing is corresponding less.By regulator solution bulk concentration and optical fiber spacing, realize the initial transmission of saturable absorber and the adjusting of modulation depth.Strength of fluid is larger, and the initial transmission of optical fiber spacing saturable absorber far away is lower, but now but can obtain large modulation depth, thereby obtains burst pulse output; Strength of fluid is less, and the initial transmission of the nearlyer saturable absorber of optical fiber spacing is higher, and modulation depth is less, now can obtain high-power pulse output.Because the liquid saturable absorber has mobility, and liquid can also play the effect of heat radiation, so, greatly increased the damage threshold of material, make the laser can steady operation.
Embodiment 1:
Described pump light source is the semiconductor laser of 980nm wavelength; Gain fibre is the 40cm erbium-doped fiber; The isolator bandwidth is 1540-1580nm; The output ratio of output coupler is 20%; The carbon nano-tube heavy aqueous solution that the liquid saturable absorber is mass ratio 20%.Total chamber is long is 1.2m.By design chamber internal dispersion and adjusting Polarization Controller, regulate translation stage and make two optical fiber spacings remain on the 50-100 micron, can obtain the output of wavelength 1555nm laser pulse, pulse duration 66fs, power output is 30mW.
Embodiment 2:
Described pump light source is the semiconductor laser of 980nm wavelength; Gain fibre is the 20cm Yb dosed optical fiber; The isolator bandwidth is 900-1100nm; The output ratio of output coupler is 20%; The graphene aqueous solution that the liquid saturable absorber is mass ratio 10%.Total chamber length is for 1m by designing the chamber internal dispersion and regulating Polarization Controller, and the adjusting translation stage makes two optical fiber spacings remain on the 50-100 micron can obtain wavelength 1050nm laser pulse, pulse duration 2ps, and power output is 226mW.
Embodiment 3:
Described pump light source is the semiconductor laser of 980nm wavelength; Gain fibre is the 40cm erbium-doped fiber; The isolator bandwidth is 1540-1580nm; The output ratio of output coupler is 80%; The graphene oxide heavy aqueous solution that the liquid saturable absorber is mass ratio 2%.Total chamber is long is 1.2m.By design chamber internal dispersion and adjusting Polarization Controller, regulate translation stage and make two optical fiber spacings remain on the 100-500 micron, can obtain the output of wavelength 1555nm laser pulse, pulse duration 126fs, power output is 100mW.
Claims (3)
1. liquid saturable absorber mode locked fiber laser, it is characterized in that: comprise loop laser resonance cavity, resonant cavity is by pumping source, wavelength division multiplexer, gain fibre, monomode fiber, isolator, liquid saturable absorption device, output coupler, wherein, liquid saturable absorption device is comprised of liquid saturable absorber and optical fiber connecting container, it is the saturable absorption material that described liquid saturable absorption device adopts carbon nano-tube, Graphene, graphene oxide, and above saturable absorption material is blended in liquid as saturable absorption solution; Described liquid selective water or heavy water; Described optical fiber connecting container comprises liquid-circulating container, optical fiber transient nozzles, fiber clamp, translation stage;
Two coaxial placements of optical fiber transient nozzles, spacing is that the 20-50 micron guarantees to be full of saturable absorption liquid between the two; Optical fiber transient nozzles one end is horn-like, the convenient center that optical fiber is imported to transient nozzles, center is passage, the diameter of micro channel is identical with standard single-mode fiber, effect is to hold monomode fiber, and two section single-mould fibers are coaxial docking in the liquid saturable absorber by optical fiber transient nozzles 10; Fiber clamp is fixed on the translation stage of the distance for changing two ends optical fiber.
2. liquid saturable absorber mode locked fiber laser as claimed in claim 1, it is characterized in that: described pump light source is the semiconductor laser of 970-980nm wavelength; Gain fibre is erbium-doped fiber; The isolator bandwidth is 1540-1580nm; The output of output coupler is than being 3%-97%; The heavy aqueous solution of the carbon nano-tube that saturable absorption liquid is mass ratio 0.05%-20% or Graphene or graphene oxide, obtain near the laser pulse of wavelength 1500-1600nm.
3. liquid saturable absorber mode locked fiber laser as claimed in claim 1, it is characterized in that: described pump light source is the semiconductor laser of 970-980nm wavelength; Gain fibre is Yb dosed optical fiber; The isolator bandwidth is 900-1100nm; The output of output coupler is than being 3%-97%; The aqueous solution of the carbon nano-tube that saturable absorption liquid is mass ratio 0.05%-20% or Graphene or graphene oxide or heavy aqueous solution, obtain near the laser pulse of wavelength 900-1150nm.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104393476A (en) * | 2014-11-05 | 2015-03-04 | 青岛大学 | Tunable passive mode-locked laser |
| CN106129796A (en) * | 2016-08-09 | 2016-11-16 | 广东工业大学 | The MoS prepared based on magnetron sputtering method2saturable absorption body thin film and corresponding ultrashort pulse fiber laser |
| CN107603481A (en) * | 2017-08-21 | 2018-01-19 | 青岛大学附属医院 | A kind of preparation method of medical laser absorbing material |
| CN107706731A (en) * | 2017-09-01 | 2018-02-16 | 张家宜 | Saturable absorber based on two-dimentional antimony alkene material and preparation method thereof and Mode-locked laser device |
| CN107946893A (en) * | 2017-11-24 | 2018-04-20 | 中国计量大学 | The saturable absorber device of gradual change multimode single mode structure based on microcavity built in single mode |
| CN109217089A (en) * | 2018-09-04 | 2019-01-15 | 长春理工大学 | One kind being based on As40Se60The pulse optical fiber of saturable absorber |
| CN110444999A (en) * | 2019-07-12 | 2019-11-12 | 中国科学院西安光学精密机械研究所 | Laser cooling fluids, laser and Q-regulating method based on stimulated Brillouin scattering |
| CN110702090A (en) * | 2019-10-29 | 2020-01-17 | 西安电子科技大学 | High-precision lock-zone-free laser gyro device and method |
| CN110769769A (en) * | 2017-04-19 | 2020-02-07 | 乔·布朗 | Side-emitting laser system with isolated conduit and method for achieving tissue vaporization and coagulation |
| CN114552354A (en) * | 2022-02-24 | 2022-05-27 | 郑州轻工业大学 | Ethylene glycol-based saturable absorber, preparation method and application thereof |
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| US20130182726A1 (en) * | 2012-01-12 | 2013-07-18 | Korea Advanced Institute Of Science And Technology | Produces various types of pulses by controlling the distance between the saturable absorber connectors |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104393476A (en) * | 2014-11-05 | 2015-03-04 | 青岛大学 | Tunable passive mode-locked laser |
| CN106129796A (en) * | 2016-08-09 | 2016-11-16 | 广东工业大学 | The MoS prepared based on magnetron sputtering method2saturable absorption body thin film and corresponding ultrashort pulse fiber laser |
| CN110769769A (en) * | 2017-04-19 | 2020-02-07 | 乔·布朗 | Side-emitting laser system with isolated conduit and method for achieving tissue vaporization and coagulation |
| CN110769769B (en) * | 2017-04-19 | 2023-03-24 | 乔·布朗 | Side-emitting laser system with isolated conduit and method for achieving tissue vaporization and coagulation |
| CN107603481A (en) * | 2017-08-21 | 2018-01-19 | 青岛大学附属医院 | A kind of preparation method of medical laser absorbing material |
| CN107706731A (en) * | 2017-09-01 | 2018-02-16 | 张家宜 | Saturable absorber based on two-dimentional antimony alkene material and preparation method thereof and Mode-locked laser device |
| CN107946893A (en) * | 2017-11-24 | 2018-04-20 | 中国计量大学 | The saturable absorber device of gradual change multimode single mode structure based on microcavity built in single mode |
| CN109217089A (en) * | 2018-09-04 | 2019-01-15 | 长春理工大学 | One kind being based on As40Se60The pulse optical fiber of saturable absorber |
| CN110444999A (en) * | 2019-07-12 | 2019-11-12 | 中国科学院西安光学精密机械研究所 | Laser cooling fluids, laser and Q-regulating method based on stimulated Brillouin scattering |
| CN110702090B (en) * | 2019-10-29 | 2022-05-03 | 西安电子科技大学 | High-precision lock-zone-free laser gyro device and method |
| CN110702090A (en) * | 2019-10-29 | 2020-01-17 | 西安电子科技大学 | High-precision lock-zone-free laser gyro device and method |
| CN114552354A (en) * | 2022-02-24 | 2022-05-27 | 郑州轻工业大学 | Ethylene glycol-based saturable absorber, preparation method and application thereof |
| CN114552354B (en) * | 2022-02-24 | 2024-01-12 | 郑州轻工业大学 | Ethylene glycol-based saturable absorber, preparation method and application thereof |
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Application publication date: 20131211 |