CN202103310U - Passive mode-locking device based on single-walled carbon nanotubes and fiber laser - Google Patents
Passive mode-locking device based on single-walled carbon nanotubes and fiber laser Download PDFInfo
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- CN202103310U CN202103310U CN2011201780977U CN201120178097U CN202103310U CN 202103310 U CN202103310 U CN 202103310U CN 2011201780977 U CN2011201780977 U CN 2011201780977U CN 201120178097 U CN201120178097 U CN 201120178097U CN 202103310 U CN202103310 U CN 202103310U
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Abstract
The utility model is applicable to the technical field of fiber laser design and provides a passive mode-locking device based on single-walled carbon nanotubes and a fiber laser. The passive mode-locking device comprises a photonic crystal fiber; and covering air holes of the photonic crystal fiber are filled with single-walled carbon nanotubes. As the single-walled carbon nanotubes of the passive mode-locking device are applied in the photonic crystal fiber, the covering of the photonic crystal fiber consists of a series of air holes, the temperature sensibility is not strong, and temperature stability is excellent, the interaction length of an evanescent field of the single-walled carbon nanotubes and fiber core conduction mode in a resonant cavity of the laser is increased, and the heat burning of the single-walled carbon nanotubes caused by fiber core light field is avoided. Meanwhile, as the dispersion design of the photonic crystal fiber has great flexibility, dispersion into the resonant cavity of the laser by other elements can be made up, thereby ensuring the stability of the laser and the quality of output ultrashort pulse.
Description
Technical field
The utility model belongs to the fiber laser design field, relates in particular to a kind of passive mode locking device and fiber laser based on SWCN.
Background technology
Laser mode locking is meant the technology that produces ultra-short pulse laser, comprises active mode locking and passive mode locking.Passive mode locking wherein is meant that the non-linear absorption properties of utilizing the passive mode locking device produces the technology of the ultra-short pulse laser of picosecond magnitude or femtosecond magnitude.Because therefore high, advantages such as pulse quality is high, efficient is high, cost is low, easy maintenance simple and compact for structure, stable that the passive mode-locking fiber laser of Application of Passive mode-locking technique has are widely used in fields such as optical fiber communication, light signal processing and sensing, spectral measurements, three-dimensional light storage, super continuum source, bio-photon, laser medicine.
Traditional passive mode locking device has nonlinear optical fiber annular mirror, nonlinear polarization rotary control switch and semiconductor saturable absorbing mirror etc., and semiconductor saturable absorbing mirror is wherein used more extensive.Yet,, make that its preparation cost is higher because the preparation of semiconductor saturable absorbing mirror need be applied to professional, complicated semiconductor device production equipment such as ultra-clean chamber, metal organic chemical vapor deposition (mocvd), metal organic vapor or molecular beam epitaxy.
For this reason, prior art provides a kind of passive mode locking device.With respect to traditional semiconductor saturable absorbing mirror, the preparation of SWCN is handled easily, cost is low and be easy to totally-enclosed encapsulation.Present passive mode locking device is directly to interact with the transmission light field in laser resonant cavity through SWCN (SWCNTs), utilizes its saturable absorption characteristic to realize the passive mode locking of laser.Yet because very high optical power density can produce fire damage to SWCN in the laser resonant cavity, therefore, this kind passive mode locking device that prior art provides is being restricted aspect the generation high energy pulse; In addition, this kind passive mode locking device also can be introduced extra insertion loss and harmful reverberation in resonant cavity, and the direct physical contact also can make the stability of laser and output pulse quality can not get ensureing to SWCN generation damage.
The utility model content
The purpose of the utility model is to provide a kind of passive mode locking device based on SWCN, is intended to make laser can produce stable high-quality and high-power pulse.
The utility model is achieved in that said passive mode locking device comprises photonic crystal fiber; Be filled with SWCN in the covering airport of said photonic crystal fiber.
The utility model also provides a kind of fiber laser, comprises that output has pumping source, resonant cavity, second optical isolator element and the output of the pump light of first wavelength value, and said resonant cavity is the unidirectional loop resonant cavity, and said resonant cavity comprises:
Convert the monomode fiber of laser to second wavelength value as the er-doped ion of gain substance, with the pump light with said first wavelength value of said pumping source output;
The optical fiber polarisation control unit;
First optical isolator element;
To the input laser carry out passive mode locking, to obtain first the passive mode locking device of ultra-short pulse laser based on SWCN;
The said first a part of said ultra-short pulse laser that obtain based on the passive mode locking device locked mode of SWCN is exported to the optic fiber coupling unit of said second optical isolator element;
Place the said first said ultra-short pulse laser of another part that obtain based on the passive mode locking device locked mode of SWCN to be transferred to the monomode fiber on the light path;
The optical fibre wavelength-division multiplex unit;
The monomode fiber of said optical fibre wavelength-division multiplex unit, er-doped ion, optical fiber polarisation control unit, first optical isolator element, the first passive mode locking device based on SWCN, optic fiber coupling unit and monomode fiber are arranged along the direction of laser transmission in the said resonant cavity in order;
The said first passive mode locking device based on SWCN is the passive mode locking device based on SWCN as claimed in claim 1, and said photonic crystal fiber is the passive fiber that fibre core does not have the er-doped ion.
The utility model also provides a kind of fiber laser, comprises that output has pumping source, resonant cavity, second optical isolator element and the output of the pump light of first wavelength value, and said resonant cavity is the unidirectional loop resonant cavity, and said resonant cavity comprises:
Laser to input carries out passive mode locking, to obtain ultra-short pulse laser, simultaneously the pump light with said first wavelength value of said pumping source output is converted to the second passive mode locking device based on SWCN of the laser with second wavelength value;
The optical fiber polarisation control unit;
First optical isolator element;
The a part of said ultra-short pulse laser that said first optical isolator element is obtained is exported to the optic fiber coupling unit of said second optical isolator element;
The said ultra-short pulse laser of another part that places said first optical isolator element to obtain is transferred to the monomode fiber on the light path;
The optical fibre wavelength-division multiplex unit;
Said optical fibre wavelength-division multiplex unit, the second passive mode locking device, optical fiber polarisation control unit, first optical isolator element, optic fiber coupling unit and monomode fiber are arranged along the direction of laser transmission in the said resonant cavity in order;
The said second passive mode locking device based on SWCN is the passive mode locking device based on SWCN as claimed in claim 1, and said photonic crystal fiber is the Active Optical Fiber that fibre core is mixed with erbium ion.
Because the passive mode locking device based on SWCN that the utility model provides is applied to SWCN in the photonic crystal fiber; And the covering of photonic crystal fiber is made up of a series of airports; To temperature-insensitive; Have good temperature stability, can increase the interaction length of evanscent field in laser resonant cavity of SWCN and fiber core guided modes, and avoided SWCN is produced fire damage.Simultaneously because the chromatic dispersion of photonic crystal fiber design has bigger flexibility; The chromatic dispersion that other element is introduced in can the compensate for laser resonant cavity; Realize flexibly cavity dispersion management and good locked mode effect, thereby guaranteed the quality of ultrashort pulse of stability and the output of laser.
Description of drawings
Fig. 1 is the passive mode locking preparation of devices method flow diagram based on SWCN that the utility model provides;
Fig. 2 is the structure chart of the fiber laser that provides of the utility model first embodiment;
Fig. 3 is the structure chart of the fiber laser that provides of the utility model second embodiment.
Embodiment
For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
The passive mode locking device based on SWCN that the utility model provides can produce stable high-quality and high-power pulse for the assurance laser; Adopted SWCN and photonic crystal fiber (Photonic Crystal Fiber, the technology that PCF) combines.
The passive mode locking device based on SWCN that the utility model provides comprises: photonic crystal fiber, this photonic crystal fiber both can be the Active Optical Fibers that fibre core is mixed with erbium ion, also can be the passive fibers that fibre core does not have the er-doped ion; Be filled with SWCN in this photonic crystal fiber covering airport.Should be that evanscent field interaction through SWCN and fiber core guided modes realizes through the locked mode of wherein laser based on passive mode locking device of SWCN.
Because the passive mode locking device based on SWCN that the utility model provides is applied to SWCN in the photonic crystal fiber; And the covering of photonic crystal fiber is made up of a series of airports; To temperature-insensitive; Have good temperature stability, can increase the interaction length of evanscent field in laser resonant cavity of SWCN and fiber core guided modes, and avoided SWCN is produced fire damage.Simultaneously because the chromatic dispersion of photonic crystal fiber design has bigger flexibility; The chromatic dispersion that other element is introduced in can the compensate for laser resonant cavity; Realize flexibly cavity dispersion management and good locked mode effect, thereby guaranteed the quality of ultrashort pulse of stability and the output of laser.
The utility model also provides a kind of aforesaid passive mode locking preparation of devices method based on SWCN, and the flow process as Fig. 1 shows this preparation method may further comprise the steps:
In step S101; The mixed solution of preparation SWCN and polymeric material; Require polymeric material to the refractive index of optical maser wavelength less than the refractive index of quartz glass to optical maser wavelength, for example can select for use polymethyl methacrylate (Polymethyl Methacrylate, PMMA).This step specifically can may further comprise the steps: the SWCN powder is scattered in dichlorobenzene solution; Dichlorobenzene solution after disperseing is mixed with the solution of the polymeric material that meets above-mentioned requirements.
In order to realize the even diffusion of SWCN powder in solution; Prevent the group bunch of SWCN powder, can also may further comprise the steps before the step that the dichlorobenzene solution of the utility model after will disperseing mixes with polymethyl methacrylate solution: the SWCN powder is applied ultrasonic wave.
In step S102, utilize capillarity or modes such as vacuum suction effect or pressurization, mixed solution is injected the covering airport of photonic crystal fiber.
In step S103, photonic crystal fiber is connected with a monomode fiber and encapsulates through optical fiber splicer.
The utility model is after step S102; Can also may further comprise the steps: the photonic crystal fiber that the covering airport is injected with said mixed solution carries out drying in vacuum furnace; Evaporating dichlorobenzene and polymeric material wherein, thereby reduce the loss and the junction loss of monomode fiber.
Above-mentioned passive mode locking device based on SWCN can be applicable to fiber laser, and Fig. 2 shows the structure of the fiber laser that the utility model first embodiment provides, and photonic crystal fiber wherein is the passive fiber that fibre core does not have the er-doped ion.
This fiber laser comprises: output has the pumping source 11 of the pump light of first wavelength value; The pump light of pumping source 11 outputs is converted to the resonant cavity 12 of ultra-short pulse laser; And the output 14 of the ultra-short pulse laser that resonant cavity 12 is converted to output.For fear of the influence of reverberation to resonant cavity, in the utility model, this fiber laser can also comprise: place second optical isolator element 13 between resonant cavity 12 and the output 14.Pumping source 11 wherein is preferably semiconductor laser diode.
Fig. 3 shows the structure of the fiber laser that the utility model second embodiment provides.First embodiment is different with the utility model; The formation of the resonant cavity 12 of the fiber laser that the utility model second embodiment provides is different; Particularly; Among the utility model second embodiment, resonant cavity 12 does not comprise first based on the passive mode locking device 125 of SWCN, the monomode fiber 122 of er-doped ion, and comprises the second passive mode locking device 128 based on SWCN that places between optical fibre wavelength-division multiplex unit 121 and the optical fiber polarisation control unit 123; Different with first based on the passive mode locking device 125 of SWCN; Second is the Active Optical Fiber that fibre core is mixed with erbium ion based on the photonic crystal fiber in the passive mode locking device 128 of SWCN, at this moment, and when second laser based on 128 pairs of inputs of passive mode locking device of SWCN carries out passive mode locking; Also, be used for converting the pump light with said first wavelength value of said pumping source output to laser with second wavelength value as gain substance.The composition of all the other each several parts, function and Rankine-Hugoniot relations repeat no more at this as stated.
Preferably, in the fiber laser that first embodiment of the invention and second embodiment of the invention provide, first wavelength value is 980nm, and second wavelength value is 1550nm; First a part of ultra-short pulse laser of obtaining based on passive mode locking device 128 locked modes of SWCN based on the passive mode locking device 125 of SWCN or second is 10% ultra-short pulse laser, as output light through 13 outputs of second optical isolator element; First another part ultra-short pulse laser of obtaining based on passive mode locking device 128 locked modes of SWCN based on the passive mode locking device 125 of SWCN or second is 90% ultra-short pulse laser, input to monomode fiber 127 with the pump light coupling with first wavelength value of pumping source 11 outputs.
Because the passive mode locking device based on SWCN that the utility model provides is applied to SWCN in the photonic crystal fiber; And the covering of photonic crystal fiber is made up of a series of airports; To temperature-insensitive; Have good temperature stability, can increase the interaction length of evanscent field in laser resonant cavity of SWCN and fiber core guided modes, and avoided SWCN is produced fire damage.Simultaneously because the chromatic dispersion of photonic crystal fiber design has bigger flexibility; The chromatic dispersion that other element is introduced in can the compensate for laser resonant cavity; Realize flexibly cavity dispersion management and good locked mode effect, thereby guaranteed the quality of ultrashort pulse of stability and the output of laser.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection range of the utility model.
Claims (3)
1. the passive mode locking device based on SWCN is characterized in that, said passive mode locking device comprises photonic crystal fiber; Be filled with SWCN in the covering airport of said photonic crystal fiber.
2. a fiber laser comprises that output has the pumping source of the pump light of first wavelength value, resonant cavity, second optical isolator element and output, and said resonant cavity is the unidirectional loop resonant cavity, it is characterized in that, said resonant cavity comprises:
Convert the monomode fiber of laser to second wavelength value as the er-doped ion of gain substance, with the pump light with said first wavelength value of said pumping source output;
The optical fiber polarisation control unit;
First optical isolator element;
To the input laser carry out passive mode locking, to obtain first the passive mode locking device of ultra-short pulse laser based on SWCN;
The said first a part of said ultra-short pulse laser that obtain based on the passive mode locking device locked mode of SWCN is exported to the optic fiber coupling unit of said second optical isolator element;
Place the monomode fiber on the said first said ultra-short pulse laser delivery optics of another part that obtain based on the passive mode locking device locked mode of SWCN;
The optical fibre wavelength-division multiplex unit;
The monomode fiber of said optical fibre wavelength-division multiplex unit, er-doped ion, optical fiber polarisation control unit, first optical isolator element, the first passive mode locking device based on SWCN, optic fiber coupling unit and monomode fiber are arranged along the direction of laser transmission in the said resonant cavity in order;
The said first passive mode locking device based on SWCN is the passive mode locking device based on SWCN as claimed in claim 1, and said photonic crystal fiber is the passive fiber that fibre core does not have the er-doped ion.
3. a fiber laser comprises that output has pumping source, resonant cavity, second optical isolator element and the output of the pump light of first wavelength value, and said resonant cavity is the unidirectional loop resonant cavity, it is characterized in that, said resonant cavity comprises:
Laser to input carries out passive mode locking, to obtain ultra-short pulse laser, simultaneously the pump light with said first wavelength value of said pumping source output is converted to the second passive mode locking device based on SWCN of the laser with second wavelength value;
The optical fiber polarisation control unit;
First optical isolator element;
The a part of said ultra-short pulse laser that said first optical isolator element is obtained is exported to the optic fiber coupling unit of said second optical isolator element;
Monomode fiber on the said ultra-short pulse laser delivery optics of the another part that places said first optical isolator element to obtain;
The optical fibre wavelength-division multiplex unit;
Said optical fibre wavelength-division multiplex unit, the second passive mode locking device based on SWCN, optical fiber polarisation control unit, first optical isolator element, optic fiber coupling unit and monomode fiber are arranged along the direction of laser transmission in the said resonant cavity in order;
The said second passive mode locking device based on SWCN is the passive mode locking device based on SWCN as claimed in claim 1, and said photonic crystal fiber is the Active Optical Fiber that fibre core is mixed with erbium ion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201780977U CN202103310U (en) | 2011-05-27 | 2011-05-27 | Passive mode-locking device based on single-walled carbon nanotubes and fiber laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201780977U CN202103310U (en) | 2011-05-27 | 2011-05-27 | Passive mode-locking device based on single-walled carbon nanotubes and fiber laser |
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| CN202103310U true CN202103310U (en) | 2012-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201780977U Expired - Fee Related CN202103310U (en) | 2011-05-27 | 2011-05-27 | Passive mode-locking device based on single-walled carbon nanotubes and fiber laser |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102244351A (en) * | 2011-05-27 | 2011-11-16 | 深圳大学 | Passive mode-locking device based on SCNTs (singlewalled carbon nano tubes) and manufacturing method thereof |
| CN107069413A (en) * | 2017-05-27 | 2017-08-18 | 杭州电子科技大学 | Lead selenide quantum dot as saturated absorbing body mode locked fiber laser |
-
2011
- 2011-05-27 CN CN2011201780977U patent/CN202103310U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102244351A (en) * | 2011-05-27 | 2011-11-16 | 深圳大学 | Passive mode-locking device based on SCNTs (singlewalled carbon nano tubes) and manufacturing method thereof |
| CN102244351B (en) * | 2011-05-27 | 2013-03-27 | 深圳大学 | Manufacturing method of passive mode-locking device based on SCNTs (singlewalled carbon nano tubes) |
| CN107069413A (en) * | 2017-05-27 | 2017-08-18 | 杭州电子科技大学 | Lead selenide quantum dot as saturated absorbing body mode locked fiber laser |
| CN107069413B (en) * | 2017-05-27 | 2019-11-12 | 杭州电子科技大学 | Mode locked fiber laser of the lead selenide quantum dot as saturated absorbing body |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120104 Termination date: 20140527 |