CN108879315A - Infrared ultrafast pulse laser in a kind of novel long wave - Google Patents

Infrared ultrafast pulse laser in a kind of novel long wave Download PDF

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Publication number
CN108879315A
CN108879315A CN201811054227.9A CN201811054227A CN108879315A CN 108879315 A CN108879315 A CN 108879315A CN 201811054227 A CN201811054227 A CN 201811054227A CN 108879315 A CN108879315 A CN 108879315A
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laser
output
lens
optical fiber
novel
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李剑峰
石逸文
杨剑
赖宸东
徐瑶
罗鸿禹
刘永
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University of Electronic Science and Technology of China
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University of Electronic Science and Technology of China
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/09—Processes or apparatus for excitation, e.g. pumping
    • H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
    • H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
    • H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
    • H01S3/067—Fibre lasers
    • H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
    • H01S3/06716—Fibre compositions or doping with active elements

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Lasers (AREA)

Abstract

The invention discloses infrared ultrafast pulse lasers in a kind of novel long wave, including 885nm LD pumping source, 885nm LD pumps the source output terminal setting lens high thoroughly, anti-to 3.9 mum lasers height along laser transmission direction slant setting and to 885nm laser, focus device is set along laser outbound course after lens, holmium indium optical fiber is mixed in the laser output setting of focus device, the both sides of the face for mixing holmium indium optical fiber are oblique angle, and the laser output for mixing holmium indium optical fiber connects novel Ti3C2Micro-nano fiber, novel Ti3C2Laser alignment device is arranged along laser outbound course in micro-nano fiber laser output, output coupling device is set along laser outbound course after laser alignment device, output coupling device, which will return in laser reflection a part to lens through reflection from lens, to be mixed in holmium indium optical fiber, and the coupled device of fraction of laser light is 3.9 microns of ultrafast pulsed lasers through output.

Description

Infrared ultrafast pulse laser in a kind of novel long wave
Technical field
The invention belongs to pulsed laser technique fields, and in particular to infrared ultrafast pulse laser in a kind of novel long wave Method.
Background technique
The mid-infrared ultra-short pulse laser light source that wavelength is located at 3~5 μm becomes the hot spot of domestic and international researcher research, It is widely used to scientific research, national defence and civil field at present.Such as：Study intramolecular and intermolecular dynamics, generate Ah Pulse per second (PPS), mid-infrared laser counterweapon, environmental monitoring, industrial processes and biomedicine, Polymer Processing etc..Currently, lock Mould is to generate ultrashort pulse optical-fiber laser method the most main, specifically, by introducing between the different mode in resonant cavity Fixed phase relation locks each longitudinal mode mutually, to generate periodic ultrashort pulse its pulsewidth usually in ps~fs magnitude. 2012, peak University of Electronic Science and Technology Li Jian etc. realized mode locking Ho using in the SESAM of middle infrared band for the first time3+, Pr3+It is co-doped with ZBLAN pulse optical fiber, wherein a length of 2870nm of cardiac wave, pulsewidth 24ps, pulse energy and repetition rate are respectively 4.9nJ and 27.1MHz.Then, 2014, Sydney University T.Hu et al. was realized for the first time using InAs saturable absorber 3 stable mu m waveband annular chamber passive mode-locking Ho3+/Pr3+It is co-doped with ZBLAN optical fiber laser, pulse width, peak power, again Complex frequency, central wavelength are respectively 6ps, 465W, 24.8MHz ,~2860nm, and pulse signal-to-noise ratio is up to 73dB；U.S. Ya Lisang That university Zhu Xiushan Mountain group utilizes Fe2+：ZnSe crystal is realized as saturable absorber mixes Er3+ZBLAN mode locking pulse optical fiber Laser, the wherein a length of 2783nm of cardiac wave, pulsewidth 19ps, pulse energy and repetition rate are respectively 0.56nJ and 50MHz；The U.S. PolarOnyx company P.Wan et al. mixes Er using big core diameter3+ZBLAN optical fiber combination semiconductor saturable absorbing mirror realizes wave The Mode-locked laser of long 2784nm, it is 142mW that maximum impulse, which exports mean power, and repetition rate 16.4MHz passes through the time Bandwidth product is estimated to obtain pulse width 5ps, but this value is inaccurate.In recent years, with the rise of two-dimensional material, difference two Tie up material (such as：Graphene, topological insulator, black phosphorus etc.) also it is used for 3 micron mode-locked pulse lasers generations in succession, but pulse is wide Degree also on several ps to the level of tens of ps, stricti jurise for can not be known as ultra-short pulse laser.Canada in 2015 Université Laval and Sydney University are being mixed using the artificial saturable absorber mode locking mode of nonlinear polarization rotation of space structure The ultra-short pulse laser output of hundred femtosecond magnitudes is realized in Er fluoride fiber, Australian Macquarie University utilizes within 2016 Similar method realized in Ho/Pr co-doped fiber 2.9 μ m peak power be up to 37kW hundred femtosecond magnitude ultrashort lasers it is defeated Out, pulse width 180fs, this is also the highest of infrared mode locking pulse optical fiber laser pulse width and peak power in current It is horizontal.Infrared mode locking pulse optical fiber laser operation wavelength is concentrated mainly on 3 micron wavebands in it can be seen that, more precisely 2.7~2.9 micron wave length sections, be greater than 3 micron wavebands, in infrared mode locked fiber laser be also rarely reported.Recently with The maturation of pumped fiber technology and drawing process, optical fiber laser are gradually translated towards long wavelength.Nearest Macquarie University S.Jackson et al. mixes Dy fluoride fiber using the pumping of 2.8 mum lasers, realizes wave-length coverage at 2.95~3.35 microns Adjustable laser output；Université Laval V.Fortin et al. uses dual wavelength to mix Er3+ fluoride fiber as pumping source pumping and realizes The laser that output wavelength is 3.55 microns, in the recent period, they propose that a novel heavy doping holmium indium optical fiber, the optical fiber can make Wavelength is crossed to expand to 5 microns, pumping the optical fiber with 888nm LD realizes 3.92 μm of laser outputs of longest wavelength at room temperature, this It is the longest operation wavelength of rare earth ion doped optical fiber laser, but is more than also at present infrared mode locking arteries and veins in 3 microns not to wavelength Impulse light carries out systematization research.
New Two Dimensional material Ti at present3C2Achieve a series of development, the material have excellent physicochemical property, such as compared with Big modulation depth, damage threshold are high, conduct electricity very well and excellent mechanical performance and hydrophily.Due to novel Ti3C2Two dimension The material property of material is also very suitable for as broadband saturable absorber, realizes mode locking in 1 micron and 1.5 micron wavebands Pulse output.The novel Ti of Shenzhen University Zhang Han et al.3C2Two-dimensional material is successfully realized as intracavitary passive saturable absorber 1.06 microns of passive Q regulation pulse laser outputs.In 1.5 mu m wavebands, in conjunction with novel with this based on erbium doped ring optical fiber laser Ti3C2Two-dimensional material realizes the Mode-locked laser output of 15.4MHz.This kind of material is not applied to middle infrared waves also at present Section.
A kind of existing er-doped ZBLAN mode locking pulse fiber laser unit that can produce wavelength and be 2.8 microns, such as Fig. 3 Shown, using the laser diode of 975nm as pumping source, the golden mirror with graphite ene coatings is inhaled as passive mode-locking saturable Element is received, realizes the output of 2.8 mum laser pulses.Wherein, pump laser diode (laser diode, LD) passes through collimation Lens, dichroic mirror and condenser lens are coupled into er-doped ZBLAN gain fibre, and gain fibre one end is 0 ° of angle, and the other end is 8 ° Oblique angle, by the golden mirror with graphite ene coatings close to the end face at 8 ° of oblique angles, entire laser cavity is made of 0 ° of angle end face and Jin Jing.It is logical The characteristic of graphene saturable absorption material is crossed, the final picosecond ultrashort optical fiber pulsed laser output for realizing 2.8 microns.
The shortcomings that technology, is：1, the technology is real as passive mode-locking element based on graphene saturable absorption material Existing pulsed laser output, wherein Output of laser wavelength is 2.8 microns, be in infrared medium wave laser, and be unable to satisfy real real The demand of border long wave mid-infrared laser, furthermore graphene saturable absorption material is unstable, and damage threshold is low, it is difficult to bear Gao Gong The pumping laser of rate secondly, the pulse width of the ultra-short pulse laser of the technology export is picosecond magnitude, and cannot reach femtosecond The output of magnitude pulse laser, which greatly limits its applications militarily.2, ultra-short pulse laser output is realized in the technology It is based on linear cavity structure, and this kind of structure be compared to ring cavity structure, and it is high that laser generates threshold value, and mode locking pulse is difficult to from opening It is dynamic, and it is relatively poor to export pulse laser stability, realizes which greatly limits it and stablizes self-starting ultrashort mid-infrared pulses Output.
For this phenomenon, new departure of infrared ultrafast pulse laser, that is, used in a kind of novel long wave of invention Holmium indium optical fiber is mixed in 3.9 microns of excellent sharp lasing abilities and Ti3C2The broadband saturable absorption characteristic phase of two-dimensional material In conjunction with new method realize the output of 3.9 microns of ultrashort mid-infrared pulses optical-fiber lasers.
Summary of the invention
It is an object of the invention to：It is micro- that the realization of the current most of mid-infrared ultra-short pulse laser of solution focuses primarily upon 2 Rice and 3 micron wavebands, and the problem of be difficult to realize 3.9 microns of ultrashort long wave mid-infrared light fibre laser pulses, it proposes a kind of new The method of infrared ultrafast pulse laser in type long wave.
The technical solution adopted by the present invention is as follows：
Infrared ultrafast pulse laser in a kind of novel long wave, including 885nm LD pumping source, 885nm LD pumping source are defeated The outlet setting lens high thoroughly, anti-to 3.9 mum lasers height along laser transmission direction slant setting and to 885nm laser, lens Focus device is set along laser outbound course later, holmium indium optical fiber is mixed in the laser output setting of focus device, by saturating The laser that mirror transmission comes is coupled by focus device focusing mixes holmium indium optical fiber, mixes the both sides of the face of holmium indium optical fiber It is oblique angle, the laser output for mixing holmium indium optical fiber connects novel Ti3C2Micro-nano fiber, novel micro nanometer Ti3C2Optical-fiber laser Laser alignment device is arranged along laser outbound course in output end, is arranged after laser alignment device along laser outbound course and exports coupling Clutch part, output coupling device, which will return in laser reflection a part to lens through reflection from lens, to be mixed in holmium indium optical fiber, part The coupled device of laser is 3.9 microns of ultrafast pulsed lasers through output.
Further, the lens tilt 45 ° of placements, novel Ti along laser transmission direction3C2Micro-nano fiber laser outbound course Parallel with by the laser outbound course of lens and reversed, output coupling device is located at immediately below lens and along laser using one Transmission direction tilts 45 ° of output coupling mirror, and 60% 3.9 mum lasers are reflected back lens to through lens by output coupling mirror It is reflected into and mixes the initial end face of holmium indium optical fiber, 40% 3.9 mum lasers are swashed through output for 3.9 microns of ultrafast pulses Light.
Further, isolator is provided between the laser alignment device and output coupling device.
Further, the focus device uses condenser lens.
Further, the laser alignment device uses collimating mirror.
Further, described to mix holmium indium optical fiber and novel Ti3C2Micro-nano fiber is connected using end face direct coupling system.
Further, the novel Ti3C2The preparation method of micro-nano fiber is：Fluoride fiber is drawn with flame spary technology Micro-nano fiber is made, is based on heat-conduction effect and optical tweezer effect for New Two Dimensional material Ti3C2Material deposits on micro-nano fiber, Novel Ti is prepared3C2Optical fiber.
In conclusion by adopting the above-described technical solution, the beneficial effects of the invention are as follows：
1, in the present invention, holmium indium optical fiber is mixed using the direct lasing of 885nm wave band pumping source and generates 3.9 mum wavelength laser And by Ti3C2Material micro-nano optical fiber passive modulation device realizes two methods of mode locking pulse as intracavitary saturable absorption element It combines, realizes the ultrashort pulse output of 3.9 stable micron wave lengths, output coupling device arrives laser reflection a part It returns to mix through reflection from lens on lens and ensures laser generation in holmium indium optical fiber, constitute annular chamber, modelocking threshold can be reduced, it is easy-to-use Self-starting, realization picosecond to femtosecond ultrashort pulse export；
2, in the present invention, focus device uses condenser lens, and laser alignment device uses collimating mirror, and lens are transmitted along laser Direction tilts 45 ° of placements, novel Ti3C2Micro-nano fiber laser outbound course is parallel with by the laser outbound course of lens and anti- To output coupling device is located at immediately below lens and is tilted along laser transmission direction 45 ° of output coupling mirror using one, is formed Compact-sized ring cavity structure can produce pulsed infrared laser in the high ultrashort long wave of good beam quality, stability, can apply Commercial value is very big；
3, in the present invention, it is provided with isolator between laser alignment device and output coupling device, for realizing annular chamber The single direction of interior signal laser transmits, and prevents influence of the laser backscatter to laser output characteristic is realized；
4, in the present invention, holmium indium optical fiber and novel Ti are mixed3C2Micro-nano fiber is connected using end face direct coupling system, Reduce transmission loss；
5, in the present invention, fluoride fiber is drawn by micro-nano fiber with flame spary technology, based on heat-conduction effect and Optical tweezer effect is by New Two Dimensional material Ti3C2Material deposits on micro-nano fiber, and novel Ti is prepared3C2Optical fiber is not only swashing Nonlinear effect is enhanced in optical cavity, while also reducing Insertion Loss, the effective active area for improving saturable absorption and damage Threshold value.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the structural schematic diagram of infrared ultrafast pulse laser in the novel long wave of the present invention；
Fig. 2 is the energy level schematic diagram that the present invention mixes holmium ion in holmium indium optical fiber；
Fig. 3 is that a kind of in background of invention can produce er-doped ZBLAN mode locking pulse optical fiber that wavelength is 2.8 microns and swash Light device apparatus structure schematic diagram；
It is marked in figure：1-885nmLD pumping source, 2- lens, 3- focus device, 4- mix holmium indium optical fiber, and 5- is novel Ti3C2Micro-nano fiber, 6- collimating element, 7- isolator, 8- output coupling device, 9- energy level5I8, 10- energy level5I7, 11- energy level5I6, 12- energy level5I5, 13-885nm LD pumping optical pumping ground state particle realization ground state absorption process (5I8→5I5), 14-3.9 is micro- Rice radiation laser (5I5→5I6)。
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not For limiting the present invention, i.e., described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is logical The component for the embodiment of the present invention being often described and illustrated herein in the accompanying drawings can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, those skilled in the art Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
It should be noted that the relational terms of term " first " and " second " or the like be used merely to an entity or Operation is distinguished with another entity or operation, and without necessarily requiring or implying between these entities or operation, there are any This actual relationship or sequence.Moreover, the terms "include", "comprise" or its any other variant be intended to it is non-exclusive Property include so that include a series of elements process, method, article or equipment not only include those elements, but also Further include other elements that are not explicitly listed, or further include for this process, method, article or equipment it is intrinsic Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including described There is also other identical elements in the process, method, article or equipment of element.
Infrared ultrafast pulse laser in a kind of novel long wave, as shown in Figure 1, including 885nm LD pumping source 1,885nm The setting of 1 output end of LD pumping source is along laser transmission direction slant setting and high thoroughly, high to 3.9 mum lasers anti-to 885nm laser Lens 2, focus device 3 is set along laser outbound course after lens 2, holmium fluorine is mixed in the laser output setting of focus device 3 Change indium optical fiber 4, is coupled by the laser of lens transmission by the focusing of focus device 3 and mixes holmium indium optical fiber 4, mix holmium fluorine The both sides of the face for changing indium optical fiber 4 are oblique angle, and the laser output for mixing holmium indium optical fiber 4 connects novel Ti3C2Micro-nano fiber 5, Novel micro nanometer Ti3C25 laser output of optical fiber is after laser outbound course setting laser alignment device 6, laser alignment device 6 Along laser outbound course be arranged output coupling device 8, output coupling device 8 by laser reflection a part to lens 2 through lens 2 It is reflected back and mixes in holmium indium optical fiber 4, the coupled device 8 of fraction of laser light is 3.9 microns of ultrafast pulsed lasers through output.This hair It is bright holmium indium optical fiber is mixed using the direct lasing of 885nm wave band pumping source to generate 3.9 mum wavelength laser and by Ti3C2Material is micro- Nano fiber passive modulation device realizes that two methods of mode locking pulse combine as intracavitary saturable absorption element, realizes stable The ultrashort pulses of 3.9 micron wave lengths exports, output coupling device by laser reflection a part to lens through reflection from lens It returns to mix and ensures laser generation in holmium indium optical fiber, constitute annular chamber, modelocking threshold, easy-to-use self-starting, realization picosecond can be reduced It is exported to femtosecond ultrashort pulse.
The wavelength is 885nm LD pumping source 1 for generating continuous laser.
The lens 2 are using dichroic mirror or the lens for having plated film of oneself production, along laser transmission direction slant setting, and It is high to 885nm laser saturating, it is high to 3.9 mum lasers anti-, for distinguishing 885nm pump beam and 3.9 micron signal light beams, tilt Angle matches with output coupling device 8, the direction of propagation of the 885nm pump light through lens 2 and coupled apparatus 8 transmit one The direction of propagation of the part 3.9nm laser after the reflection of lens 2 is overlapped, and line focus device 3, which is transferred to, all in an optical path mixes holmium 4 output end face of indium optical fiber.Coupled apparatus 8 can use for example dichroiscopic combination of optical frames, carry out tilt angle cooperation, By a part of 3.9nm laser reflection to lens 2.
The focus device 3 is focused using condenser lens or the modes such as telescopic focusing will produce 885nm LD pumping source 1 Raw coupling pump light is into mixing in holmium indium optical fiber 4.
It is in order to avoid both ends generate 4% when the fiber end face straight angle that the both sides of the face for mixing holmium indium optical fiber 4, which are oblique angle, Fresnel reflection formed inner laser oscillation.
3.9 micron signal laser of generation using collimating mirror or are carried out light beam with collimator by the laser alignment device 6 Collimation.
It is described to mix holmium indium optical fiber 4 and novel Ti3C2Micro-nano fiber 5 is swashed 3.9 microns using end face direct coupling system Optical coupling is into novel Ti3C2Micro-nano fiber 5, reduces transmission loss.
Further, the lens 2 tilt 45 ° of placements, novel Ti along laser transmission direction3C25 laser output side of micro-nano fiber To parallel and reversed with by the laser outbound course of lens 2, output coupling device 8 using one be located at 2 underface of lens and Tilt 45 ° of output coupling mirror along laser transmission direction, output coupling mirror by 60% 3.9 mum lasers be reflected back lens 2 from And be reflected into through lens 2 and mix the initial end face of holmium indium optical fiber 4, it is 3.9 microns that 40% 3.9 mum lasers, which are penetrated output, Ultrafast pulsed laser.
Focus device uses condenser lens, and laser alignment device uses collimating mirror, and lens tilt 45 ° along laser transmission direction It places, novel Ti3C2Micro-nano fiber laser outbound course is parallel with by dichroiscopic laser outbound course and reversed, exports coupling Clutch part is located at immediately below lens and is tilted along laser transmission direction 45 ° of output coupling mirror using one, is formed compact-sized Ring cavity structure, can produce pulsed infrared laser in the high ultrashort long wave of good beam quality, stability, commercial value can be applied Greatly.
Further, the novel Ti3C2The preparation method of micro-nano fiber 5 is：Fluoride fiber is drawn with flame spary technology Micro-nano fiber is made, is based on heat-conduction effect and optical tweezer effect for New Two Dimensional material Ti3C2Material deposits on micro-nano fiber, Novel Ti is prepared3C2Optical fiber only enhances nonlinear effect in laser cavity, while also reducing Insertion Loss, improving and can satisfy With the effective active area and damage threshold of absorption.
Further, it is provided with isolator 7 between the laser alignment device 6 and output coupling device 8, for realizing annular The single direction of intracavitary signal laser transmits, and prevents influence of the laser backscatter to laser output characteristic is realized.
Feature and performance of the invention are described in further detail with reference to embodiments.
Embodiment 1
Infrared ultrafast pulse laser in a kind of novel long wave that present pre-ferred embodiments provide, as shown in Figure 1, including 885nm LD pumping source 1, the setting of 1 output end of 885nm LD pumping source tilt 45 ° along laser transmission direction and place and swash to 885nm High thoroughly, anti-to the 3.9 mum lasers height dichroic mirror 2 of light, dichroic mirror 2 are arranged condenser lens 3 along laser outbound course later, focus Holmium indium optical fiber 4 is mixed in the laser output setting of lens 3, and the laser come by dichroic mirror transmission is focused by condenser lens 3 It is coupled into and mixes holmium indium optical fiber 4, the both sides of the face for mixing holmium indium optical fiber 4 are oblique angle, mix swashing for holmium indium optical fiber 4 Light output end connects novel Ti3C2Micro-nano fiber 5, novel Ti3C25 laser outbound course of micro-nano fiber and swashing by dichroic mirror 2 Light output direction is parallel and reversed, novel micro nanometer Ti3C2Collimating mirror 6 is arranged along laser outbound course in 5 laser output of optical fiber, quasi- One output for being located at immediately below dichroic mirror 2 and tilting 45 ° along laser transmission direction is set along laser outbound course after straight mirror 6 60% 3.9 mum lasers are reflected back dichroic mirror 2 to be reflected into through dichroic mirror 2 and mix holmium by coupling mirror 8, output coupling mirror 8 The initial end face of indium optical fiber 4, it is 3.9 microns of ultrafast pulsed lasers that 40% 3.9 mum lasers, which are penetrated output,.Mix holmium fluorination Indium optical fiber 4 and novel Ti3C23.9 mum lasers are coupled into novel Ti using end face direct coupling system by micro-nano fiber 53C2It is micro- Nano fiber 5.
Below in conjunction with not using novel Ti3C23.9 microns of continuous lasers output realization process of micro-nano fiber 5 is to 3.9 microns Ultra-short pulse laser output realization process is described：
1,3.9 microns of continuous laser output realization processes are：By 885nm LD pumping source output laser 1 through dichroic mirror 2, The coupling of condenser lens 3, which is injected into, mixes in holmium indium optical fiber 4, mixes energy level schematic diagram such as Fig. 2 institute of holmium ion in holmium indium optical fiber Show, is located at energy level5I8Ground state particle on 9 is pumped into energy level by absorbing 885nm LD pump light5I5On 12, ground state is realized Absorption process5I8→5I513, energy level5I5Particle on 12 is constantly increasing accumulation, realizes that population is anti-after reaching a certain level Turn, to generate 3.9 mum lasers 14, then collimated lens 6 collimate 3.9 mum lasers, export by dichroic mirror.
2,3.9 microns of ultra-short pulse laser output realization processes are：Based on 1 process, holmium indium optical fiber 4 and standard are being mixed Novel Ti is inserted between straight lens 63C2Micro-nano fiber 5 makes direct from 3.9 mum lasers that 4 end face of holmium indium optical fiber exports are mixed It is coupled into novel Ti3C2In micro-nano fiber 5, the novel Ti based on passive mode-locking saturable absorption element3C2Micro-nano fiber 5 are permitted Perhaps the strong part of 3.9 mum lasers penetrates, and absorbs weak part, and such laser is lasting in constantly cyclic process to be made by force Ray laser constantly penetrates, and dim light laser is constantly absorbed, final to realize narrowing for laser pulse, via output coupling mirror 8 to 3.9 The reflection of mum laser 60% ensures laser generation to realize in fraction of laser light return cavity, 40% penetrates 3.9 microns of ultrashort length The output of wave mid-infrared laser.
Embodiment 2
Present pre-ferred embodiments on the basis of example 1, are set between laser alignment device 6 and output coupling device 8 It is equipped with isolator 7, for realizing the single direction transmission of signal laser in annular chamber, prevents laser backscatter to realization laser The influence of output characteristics.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.

Claims (7)

1. infrared ultrafast pulse laser in a kind of novel long wave, it is characterised in that：Including 885nm LD pumping source (1), 885nm The output end setting of LD pumping source (1) is high thoroughly along laser transmission direction slant setting and to 885nm laser, to 3.9 mum lasers Focus device (3) are arranged along laser outbound course later in high anti-lens (2), lens (2), the laser output of focus device (3) Holmium indium optical fiber (4) is mixed in end setting, is focused to be coupled by focus device (3) by the laser that lens (2) transmission comes and be mixed Holmium indium optical fiber 4, the both sides of the face for mixing holmium indium optical fiber (4) are oblique angle, mix the laser output of holmium indium optical fiber (4) End connects novel Ti3C2Micro-nano fiber (5), novel Ti3C2Micro-nano fiber (5) laser output swashs along the setting of laser outbound course Output coupling device (8) are arranged along laser outbound course later in light collimation device (6), laser alignment device (6), output coupler Part (8), which will be reflected back on laser reflection a part to lens (2) through lens (2), to be mixed in holmium indium optical fiber (4), fraction of laser light warp Coupled apparatus (8) is 3.9 microns of ultrafast pulsed lasers through output.
2. infrared ultrafast pulse laser in a kind of novel long wave according to claim 1, it is characterised in that：The lens (2) 45 ° of placements, novel Ti are tilted along laser transmission direction3C2Micro-nano fiber (5) laser outbound course and swashing by lens (2) Light output direction is parallel and reversed, and output coupling device (8) is located at immediately below lens (2) and along laser transmission direction using one 60% 3.9 mum lasers are reflected back lens (2) to anti-through lens (2) by the output coupling mirror of 45 ° of inclination, output coupling mirror It injects into holmium indium optical fiber (4) initial end face is mixed, it is 3.9 microns of ultrafast pulses that 40% 3.9 mum lasers, which are penetrated output, Laser.
3. infrared ultrafast pulse laser in a kind of novel long wave according to claim 1 or 2, it is characterised in that：It is described Isolator (7) are provided between laser alignment device (6) and output coupling device (8).
4. infrared ultrafast pulse laser in a kind of novel long wave according to claim 1 or 2, it is characterised in that：It is described Focus device (3) uses condenser lens.
5. infrared ultrafast pulse laser in a kind of novel long wave according to claim 1 or 2, it is characterised in that：It is described Laser alignment device (6) uses collimating mirror.
6. infrared ultrafast pulse laser in a kind of novel long wave according to claim 1 or 2, it is characterised in that：It is described Mix holmium indium optical fiber (4) and novel Ti3C2Micro-nano fiber (5) is connected using end face direct coupling system.
7. infrared ultrafast pulse laser in a kind of novel long wave according to claim 1 or 2, it is characterised in that：It is described Novel Ti3C2The preparation method of micro-nano fiber (5) is：Fluoride fiber is drawn into micro-nano fiber with flame spary technology, is based on Heat-conduction effect and optical tweezer effect are by New Two Dimensional material Ti3C2Material deposits on micro-nano fiber, and novel Ti is prepared3C2 Optical fiber.
CN201811054227.9A 2018-09-11 2018-09-11 Infrared ultrafast pulse laser in a kind of novel long wave Pending CN108879315A (en)

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Citations (2)

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CN102751650A (en) * 2012-07-09 2012-10-24 北京工业大学 Ytterbium doped photonic crystal fiber nonlinear polarization rotation mode-locked laser device
CN107069403A (en) * 2017-06-08 2017-08-18 电子科技大学 Based on cascade draw cone fluoride fiber it is tunable in infrared mode locked fiber laser

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Publication number Priority date Publication date Assignee Title
CN102751650A (en) * 2012-07-09 2012-10-24 北京工业大学 Ytterbium doped photonic crystal fiber nonlinear polarization rotation mode-locked laser device
CN107069403A (en) * 2017-06-08 2017-08-18 电子科技大学 Based on cascade draw cone fluoride fiber it is tunable in infrared mode locked fiber laser

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