CN108039638A - Low threshold twin-stage light spectrum reshaping flexible optical fibre high power mode-locked laser - Google Patents
Low threshold twin-stage light spectrum reshaping flexible optical fibre high power mode-locked laser Download PDFInfo
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- CN108039638A CN108039638A CN201711290572.8A CN201711290572A CN108039638A CN 108039638 A CN108039638 A CN 108039638A CN 201711290572 A CN201711290572 A CN 201711290572A CN 108039638 A CN108039638 A CN 108039638A
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- 238000001914 filtration Methods 0.000 claims abstract description 18
- 230000003287 optical effect Effects 0.000 claims abstract description 10
- 238000003466 welding Methods 0.000 claims description 14
- 230000010355 oscillation Effects 0.000 claims description 13
- 238000005086 pumping Methods 0.000 claims description 13
- 238000005253 cladding Methods 0.000 claims description 12
- 230000010287 polarization Effects 0.000 claims description 12
- 239000004065 semiconductor Substances 0.000 claims description 12
- 239000010453 quartz Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 229910052769 Ytterbium Inorganic materials 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 9
- 238000002844 melting Methods 0.000 abstract description 3
- 230000008018 melting Effects 0.000 abstract description 3
- 238000007493 shaping process Methods 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000004038 photonic crystal Substances 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 238000009738 saturating Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 1
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- 238000011105 stabilization Methods 0.000 description 1
Classifications
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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
- H01S3/094069—Multi-mode pumping
-
- 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
- H01S3/06704—Housings; Packages
-
- 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
- H01S3/06712—Polarising fibre; Polariser
-
- 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
- H01S3/06729—Peculiar transverse fibre profile
- H01S3/06733—Fibre having more than one cladding
-
- 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
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/11—Mode locking; Q-switching; Other giant-pulse techniques, e.g. cavity dumping
- H01S3/1106—Mode locking
Abstract
The invention belongs to laser technology and nonlinear optical technology field, and in particular to a kind of Low threshold twin-stage light spectrum reshaping flexible optical fibre high power mode-locked laser.The present invention is using all -fiber scheme that multimode pump laser source, high power pump signal bundling device and flexible double clad gain fibre three are carried out to melting splicing, and twin-stage spectral filtering shaping pulse measure is used, realize compact-sized Low threshold flexible optical fibre high power femtosecond mode-locked laser source.The present invention not only meets that Low threshold locked mode realizes high-average power mode-locked laser output function, it is obtained for and is obviously improved in terms of the structural compactness of laser and stability at the same time, with highly integrated, high stability, low modelocking threshold, high-power output characteristic, there is important application prospect.
Description
Technical field
The invention belongs to laser technology and nonlinear optical technology field, and in particular to a kind of Low threshold twin-stage light spectrum reshaping
Flexible optical fibre high power mode-locked laser.
Background technology
Optical-fiber laser is emerged rapidly with characteristics such as high efficiency, easy of integration, excellent beam qualities in Development of Laser Technology,
As academia and the hot research problem of industrial circle.As a kind of important laser technology, ultrafast optical-fiber laser is high field thing
The fields such as reason, attosecond science, nano science and bio-imaging provide brand-new research means, have been greatly facilitated these subjects
Development.Wherein, ultrashort pulse mode-locked fiber lasers oscillator is as optical fiber laser amplifier especially femtosecond fiber laser amplifier
The nucleus module of device, its output performance have decisive role to the stabilization of whole laser system with reliability service, are to realize high property
The precondition and guarantee of energy femtosecond fiber lasing light emitter.
The ultrashort pulse mode-locked fiber lasers oscillator of wide coverage is normally based on the single mode that core diameter is 6 μm at present
Optical fiber, its laser form generally include mode pump source, wavelength division multiplexer, single mode gain fibre, isolator, mode-locking device,
The devices such as dispersive compensation element.Yet with the low output power in mode pump source (<1W), device used by laser in addition
Core diameter is relatively small so that its mode-locked laser output power is typically smaller than 100mW, limits its application range.
With the progress of advanced optic fibre manufacturing technology and the appearance of large mode area pcf, mode-locked fiber lasers vibration
The output power of device is obviously improved, and tens watts of level is extend to by tens initial milliwatts.Such as 2012, moral
Uni Jena of state Martin Baumgartl et al. are in paper " 66W average power from a microjoule-
Reported in class sub-100fs fiber oscillator " (Opt.Lett.37 (10), 1640-1642 (2012)) flat
The high power mode-locked fiber lasers output of equal power 66W.However, large mode area pcf mode-locked laser usually requires again
Miscellaneous space optical path, the most typical one are exactly accurate firstly the need of free space is carried out to pumping laser with non-spherical lens
Directly, then focused on and be coupled into photonic crystal gain fibre by non-spherical lens again, pumping laser free space optical
The introducing on road make it that system structure is relative complex, and modelocking threshold is high, is not easy to integrated and adds Locked mode instability, limits
Its broader practice space.
The content of the invention
It is an object of the present invention to provide a kind of Low threshold twin-stage light spectrum reshaping flexible optical fibre high power mode-locked laser, solve
It is existing based on single mode optical fiber or photonic crystal fiber as output power existing for the mode-locked laser of gain media is low, structure
The problems such as complexity, modelocking threshold are high, stability is poor.
The present invention technical solution be：A kind of Low threshold twin-stage light spectrum reshaping flexible optical fibre high power mode-locked laser
Device, it is characterized in that：Including semiconductor pump laser, multimode pump protection device, pump signal bundling device, flexible double-contracting
Layer gain fibre, first end are emitted and emitted with second end；
The output optical fibre of the semiconductor pump laser and the input end fiber welding of multimode pump protection device, multi-mode pump
The output terminal optical fiber of Pu protector and the pumping optical fiber welding of pump signal bundling device；The forward end of the pump signal bundling device
Mouth optical fiber emits welding with first end, and the backward fiber port of pump signal bundling device and one end of flexibility double clad gain fibre are melted
Connect, the other end and the second end of flexible double clad gain fibre emit welding；
The pump light sent by semiconductor pump laser passes through multimode pump protection device and pump signal bundling device successively
After be coupled into flexible double clad gain fibre, then emit output oscillation light from second end；Second end emits the oscillation light of output
Direction is identical with pump light optical path direction；
Second end emit output oscillation light collimated by collimation lens after successively by dichroic mirror and the first plane high reflective mirror it is anti-
After penetrating steering, then polarization beam apparatus is reached after being transmitted through the first quarter-wave plate and half-wave plate successively；The dichroic mirror and
Angle between the incident light and reflected light of first plane high reflective mirror is 90 °；
Part vibration light reflection output, residue are vibrated light transmission warp by the polarization beam apparatus as laser output mouth
Cross and be transmitted through twin-stage spectral filter, isolator and the second quarter-wave plate after polarization beam apparatus successively again, then through
Two plane high reflective mirrors and the reflection of the 3rd plane high reflective mirror reach condenser lens after turning to；The second plane high reflective mirror and the 3rd flat
Angle between the incident light and reflected light of face high reflective mirror is 90 °；
The condenser lens will be emitted into pump signal bundling device after oscillation light focusing coupling through first end, forms ring lock
Mould laser generation.
Further, for above-mentioned flexible double clad gain fibre to mix the big core diameter gain fibre of ytterbium, core diameter is 25-30 μ
M, cladding diameter are 250 μm, fiber lengths 1-2m, a diameter of 5-8cm of fiber optic disc around.
Further, above-mentioned first end emits that to be emitted with second end be a diameter of 250 μm of multimode quartz pushrod；The first end
The length emitted is 2-4mm, and end plane angle is 0 °；The length that the second end emits is 3-7mm, and end plane angle is 5 ° -8 °.
Further, above-mentioned twin-stage spectral filter includes the second spectral filtering set gradually along vibration optical propagation direction
Piece and the first spectral filtering piece, the thickness of the first spectral filtering piece is 5-7mm, and the thickness of the second spectral filtering piece is
7-8mm；The first spectral filtering piece is symmetrically placed with Brewster's angle respectively with the second spectral filtering piece.
Further, the core diameter of the output optical fibre of above-mentioned semiconductor pump laser is 105 μm, and cladding diameter is
125 μm, numerical aperture 0.22, output wavelength 970-980nm；
The input end fiber of the multimode pump protection device and the core diameter of output terminal optical fiber are 105 μm, covering
A diameter of 125 μm, numerical aperture 0.22；
The pump signal bundling device is (N+1) * 1 type multimode pump signal bundling device, and wherein N is more than or equal to 2
Integer；The core diameter of the pumping end optical fiber of the pump signal bundling device is 105 μm, and cladding diameter is 125 μm, numerical aperture
For 0.22；The forward direction fiber port of the pump signal bundling device and the core diameter of backward fiber port are 25-30 μm,
Cladding diameter is 250 μm, numerical aperture 0.07；The pumping end optical fiber single armed of the pump signal bundling device bears power and is
50W。
Further, the high-reflecting film and 970-980nm of 1000-1100nm wave-length coverages are coated with the minute surface of above-mentioned dichroic mirror
The anti-reflection film of wave-length coverage.
Further, above-mentioned collimation lens is equal with the focal length of condenser lens, focal length 50-75mm；The collimation lens with
The anti-reflection film of 1000-1100nm wave-length coverages is coated with the minute surface of condenser lens；The first plane high reflective mirror, the second plane
The film that is all-trans of 1000-1100nm wave-length coverages is coated with the minute surface of high reflective mirror and the 3rd plane high reflective mirror；Described one or four point
One of wave plate, half-wave plate, polarization beam apparatus, isolator and the second quarter-wave on piece be coated with 1000-1100nm wavelength
The anti-reflection film of scope.
The beneficial effects of the present invention are：
(1) present invention is used multimode pump laser source, high power pump signal bundling device and flexible double clad gain light
Fine three carries out all -fiber scheme of melting splicing, and uses twin-stage spectral filtering shaping pulse measure, realizes compact-sized
Low threshold flexible optical fibre high power femtosecond mode-locked laser source.
(2) present invention not only meets that Low threshold locked mode realizes high-average power mode-locked laser output function, while in laser
The structural compactness of device is obviously improved with being obtained in terms of stability, has highly integrated, high stability, low modelocking threshold, height
Power out-put characteristic, has important application prospect.
(3) present invention is utilized by the use of rare-earth-ion-doped flexible double clad gain fibre as gain and nonlinear dielectric
Vibrate the self phase modulation that the strong peak power laser pulse of intracavitary produces and produce wide spectrum, while use twin-stage light spectrum reshaping
Technology carries out effective spectral filtering, realizes low modelocking threshold, the output of high power femtosecond mode-locked fiber lasers.The exportable lock of the present invention
The centre wavelength of mould laser is 1041nm, power 9W, repetition rate 73.4MHz, compressed pulse widths 102fs, 3 it is small when
Power stability is 0.5%RMS.
Brief description of the drawings
Fig. 1 is that the light channel structure of Low threshold twin-stage light spectrum reshaping flexible optical fibre high power mode-locked laser of the present invention is illustrated
Figure.
Fig. 2 exports locked mode oscillograph sequence for Low threshold twin-stage light spectrum reshaping flexible optical fibre high power mode-locked laser of the present invention
Row.
Fig. 3 is Low threshold twin-stage light spectrum reshaping flexible optical fibre high power mode-locked laser output spectrum of the present invention.
Fig. 4 shows for Low threshold twin-stage light spectrum reshaping flexible optical fibre high power mode-locked laser power stability of the present invention test
It is intended to.
Fig. 5 is the compressed pulse width of Low threshold twin-stage light spectrum reshaping flexible optical fibre high power mode-locked laser of the present invention
Schematic diagram.
Embodiment
Referring to Fig. 1, the present invention provides a kind of Low threshold twin-stage light spectrum reshaping flexible optical fibre high power mode-locked laser, its compared with
The structure of good embodiment includes semiconductor pump laser 1, multimode pump protection device 2, pump signal bundling device 3, flexible double-contracting
Layer gain fibre 4, first end emit 130 and second end emit 131；
The output optical fibre of semiconductor pump laser 1 and the input end fiber welding of multimode pump protection device 2, multimode pumping
The output terminal optical fiber of protector 2 and the pumping optical fiber welding of pump signal bundling device 3；The forward direction port of pump signal bundling device 3
Optical fiber emits 130 weldings, the backward fiber port of pump signal bundling device 3 and the one of flexible double clad gain fibre 4 with first end
Welding is held, the other end and the second end of flexible double clad gain fibre 4 emit 131 weldings.
Wherein, semiconductor pump laser 1 can select 30W, 976nm narrow linewidth lasers, and the fibre core of output optical fibre is straight
Footpath is 105 μm, and cladding diameter is 125 μm, numerical aperture 0.22；The input end fiber of multimode pump protection device 2 and output
The core diameter for holding optical fiber is 105 μm, and cladding diameter is 125 μm, numerical aperture 0.22.Pump signal bundling device 3 can be with
(2+1) * 1 type multimode pump signal bundling device is selected, the core diameter of its pumping end optical fiber is 105 μm, and cladding diameter is 125 μ
M, numerical aperture 0.22；The forward direction fiber port of pump signal bundling device 3 and the core diameter of backward fiber port are 30 μ
M, cladding diameter are 250 μm, numerical aperture 0.07；The pumping end optical fiber single armed of pump signal bundling device 3 bears power and is
50W。
For flexible double clad gain fibre 4 to mix the big core diameter gain fibre of ytterbium, its core diameter and cladding diameter are respectively 30 μ
M and 250 μm, the length of 1.3m, 976nm pump absorption coefficients are 14.2dB/m.130 and the are emitted by melting splicing first end
Two ends, which emit 131, can improve flexible double clad gain fibre facet damage threshold value.It is a diameter of 250 μm, length that first end, which emits 130,
For the multimode quartz pushrod of 2mm, it 131 is a diameter of 250 μm that second end, which emits, the multimode quartz pushrod that length is 5mm.First end emits 130
The inclination angle that 131 are emitted with second end is respectively 0 ° and 8 °, prevents etalon effect from influencing locked mode stability.
The pump light sent by semiconductor pump laser 1 closes beam by multimode pump protection device 2 and pump signal successively
It is coupled into after device 3 in flexible double clad gain fibre 4, then emits 131 output oscillation lights from second end；It is defeated that second end emits 131
The vibration light direction gone out is identical with pump light optical path direction.
Second end emit 131 outputs oscillation light collimated by collimation lens 51 after it is high by 6 and first plane of dichroic mirror successively
After the anti-reflection of mirror 70 turns to, then polarization beam apparatus 10 is reached after being transmitted through the first quarter-wave plate 80 and half-wave plate 9 successively；
Angle between the incident light and reflected light of 6 and first plane high reflective mirror 70 of dichroic mirror is 90 °；
Polarization beam apparatus 10 is saturating by part vibration light reflection output (being denoted as I), remaining oscillation light as laser output mouth
Penetrate after polarization beam apparatus and be transmitted through twin-stage spectral filter 11,12 and second quarter-wave plate of isolator successively again
81, then condenser lens 52 is reached after the second plane high reflective mirror 71 and the reflection of the 3rd plane high reflective mirror 72 turn to；Second plane
Angle between the incident light and reflected light of 71 and the 3rd plane high reflective mirror 72 of high reflective mirror is 90 °；
Condenser lens 52 will emit 130 through first end after oscillation light focusing coupling and enter pump signal bundling device 3, form annular
Mode-locked laser vibrates.
Collimation lens 51 is equal with the focal length of condenser lens 52, is the precise polished lens of 50mm, is coated with its minute surface
The anti-reflection film of 1000-1100nm wave-length coverages.Dichroic mirror 6 is coated with anti-reflection film and 1000-1100nm ripples to 976nm pumping lasers
Duan Jiguang high-reflecting films, and incidence angle is 45 °.First plane high reflective mirror 70, the second plane high reflective mirror 71 and the 3rd plane high reflective mirror
72 be 45 ° of 1000-1100nm wave band high reflective mirrors.First quarter-wave plate 80,9 and second quarter-wave plate of half-wave plate
81 can be selected high damage threshold zero-th order waveplates, and surface coating meets that oscillation light broadband is high thoroughly in resonator.Isolator 12 is polarization
Dependent isolator, it is ensured that ring resonator mode-locked laser Unidirectional；Twin-stage spectral filter 11 is included along vibration light propagation
The the second spectral filtering piece 111 and the first spectral filtering piece 110 that direction is set gradually, 110 thickness of the first spectral filtering piece are
5.5mm, the thickness of the second spectral filtering piece 111 is 7.5mm, the two is double with the symmetrically placed a cutting quartz of Brewster's angle
Refracting plates are formed.Glan-Foucault laser prism can be selected in polarization beam apparatus 10, and surface coating meets high to oscillating laser saturating.
By adjusting the first quarter-wave plate 80, half-wave plate 9, the second quarter-wave plate 81 and twin-stage spectral filtering
Device 11 can realize stable locked mode output, and referring to Fig. 2 to Fig. 5, the centre wavelength of mode-locked laser output laser is 1041nm,
Power is 9W, repetition rate 73.4MHz, compressed pulse widths 102fs, and 3 one-hour ratings, which are stablized, is less than 0.5%RMS.
Claims (7)
- A kind of 1. Low threshold twin-stage light spectrum reshaping flexible optical fibre high power mode-locked laser, it is characterised in that：Including semiconductor pump Pu laser, multimode pump protection device, pump signal bundling device, flexible double clad gain fibre, first end are emitted and emitted with second end；The output optical fibre of the semiconductor pump laser and the input end fiber welding of multimode pump protection device, multimode pumping are protected Protect the output terminal optical fiber of device and the pumping optical fiber welding of pump signal bundling device；The forward direction port optical of the pump signal bundling device It is fine to emit welding with first end, one end welding of the backward fiber port of pump signal bundling device and flexible double clad gain fibre, The other end of flexible double clad gain fibre emits welding with second end；The pump light sent by semiconductor pump laser the coupling after multimode pump protection device and pump signal bundling device successively Close and enter in flexible double clad gain fibre, then emit output oscillation light from second end；Second end emits the vibration light direction of output It is identical with pump light optical path direction；Second end emit output oscillation light collimated by collimation lens after successively by dichroic mirror and the first plane high reflective mirror reflection turn Backward, then successively polarization beam apparatus is reached after being transmitted through the first quarter-wave plate and half-wave plate；The dichroic mirror and first Angle between the incident light and reflected light of plane high reflective mirror is 90 °；Part vibration light reflection output, remaining oscillation light are transmitted through partially by the polarization beam apparatus as laser output mouth Shake and be transmitted through twin-stage spectral filter, isolator and the second quarter-wave plate successively again after beam splitter, it is then flat through second Face high reflective mirror and the reflection of the 3rd plane high reflective mirror reach condenser lens after turning to；The second plane high reflective mirror and the 3rd plane are high Angle between the incident light and reflected light of anti-mirror is 90 °；The condenser lens will be emitted into pump signal bundling device after oscillation light focusing coupling through first end, is formed annular locked mode and is swashed Light generation.
- 2. Low threshold twin-stage light spectrum reshaping flexible optical fibre high power mode-locked laser according to claim 1, its feature exist In：The flexibility double clad gain fibre is to mix the big core diameter gain fibre of ytterbium.
- 3. Low threshold twin-stage light spectrum reshaping flexible optical fibre high power mode-locked laser according to claim 1, its feature exist In：It is multimode quartz pushrod that the first end, which is emitted and emitted with second end,.
- 4. according to any Low threshold twin-stage light spectrum reshaping flexible optical fibre high power mode-locked laser in claim 1-3, It is characterized in that：The twin-stage spectral filter is included along the second spectral filtering piece for setting gradually of vibration optical propagation direction and the One spectral filtering piece；The first spectral filtering piece is symmetrically placed with Brewster's angle respectively with the second spectral filtering piece.
- 5. Low threshold twin-stage light spectrum reshaping flexible optical fibre high power mode-locked laser according to claim 4, its feature exist In：The core diameter of the output optical fibre of the semiconductor pump laser is 105 μm, and cladding diameter is 125 μm, and numerical aperture is 0.22, output wavelength 970-980nm；The input end fiber of the multimode pump protection device and the core diameter of output terminal optical fiber are 105 μm, cladding diameter For 125 μm, numerical aperture 0.22；The pump signal bundling device is (N+1) * 1 type multimode pump signal bundling device, and wherein N is the integer more than or equal to 2； The core diameter of the pumping end optical fiber of the pump signal bundling device is 105 μm, and cladding diameter is 125 μm, and numerical aperture is 0.22。
- 6. Low threshold twin-stage light spectrum reshaping flexible optical fibre high power mode-locked laser according to claim 4, its feature exist In：Be coated with the minute surface of the dichroic mirror 1000-1100nm wave-length coverages high-reflecting film and 970-980nm wave-length coverages it is anti-reflection Film.
- 7. Low threshold twin-stage light spectrum reshaping flexible optical fibre high power mode-locked laser according to claim 4, its feature exist In：The collimation lens is equal with the focal length of condenser lens, focal length 50-75mm；The mirror of the collimation lens and condenser lens The anti-reflection film of 1000-1100nm wave-length coverages is coated with face；The first plane high reflective mirror, the second plane high reflective mirror and the 3rd The film that is all-trans of 1000-1100nm wave-length coverages is coated with the minute surface of plane high reflective mirror；First quarter-wave plate, half-wave Piece, polarization beam apparatus, isolator and the second quarter-wave on piece are coated with the anti-reflection film of 1000-1100nm wave-length coverages.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112670807A (en) * | 2020-12-01 | 2021-04-16 | 中国科学院西安光学精密机械研究所 | Optical fiber ultrashort pulse laser system based on flexible transmission output and assembly method thereof |
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| US20060120418A1 (en) * | 2004-12-07 | 2006-06-08 | Imra America, Inc. | Yb: and Nd: mode-locked oscillators and fiber systems incorporated in solid-state short pulse laser systems |
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