CN209344510U - High repetition frequency passive mode-locking fiber laser - Google Patents
High repetition frequency passive mode-locking fiber laser Download PDFInfo
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- CN209344510U CN209344510U CN201920093925.3U CN201920093925U CN209344510U CN 209344510 U CN209344510 U CN 209344510U CN 201920093925 U CN201920093925 U CN 201920093925U CN 209344510 U CN209344510 U CN 209344510U
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- 239000000835 fiber Substances 0.000 title claims abstract description 40
- 239000013307 optical fiber Substances 0.000 claims abstract description 58
- 239000006096 absorbing agent Substances 0.000 claims abstract description 25
- 238000005086 pumping Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 230000003287 optical effect Effects 0.000 claims description 6
- 238000001069 Raman spectroscopy Methods 0.000 claims description 4
- 230000010287 polarization Effects 0.000 claims description 4
- 229910052691 Erbium Inorganic materials 0.000 claims description 3
- 229910052775 Thulium Inorganic materials 0.000 claims description 3
- 229910052769 Ytterbium Inorganic materials 0.000 claims description 3
- 229910052797 bismuth Inorganic materials 0.000 claims description 3
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 claims description 3
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
- 230000009022 nonlinear effect Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- -1 rare earth ions Chemical class 0.000 claims description 3
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- NAWDYIZEMPQZHO-UHFFFAOYSA-N ytterbium Chemical compound [Yb] NAWDYIZEMPQZHO-UHFFFAOYSA-N 0.000 claims description 3
- 239000002041 carbon nanotube Substances 0.000 claims description 2
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 14
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000010521 absorption reaction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 4
- 238000001914 filtration Methods 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 238000000411 transmission spectrum Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005253 cladding Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000002071 nanotube Substances 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 244000144992 flock Species 0.000 description 1
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- 230000031700 light absorption Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
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- 238000005259 measurement Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
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Abstract
A kind of high repetition frequency passive mode-locking fiber laser based on full-optical-fiber fabry-perot inner cavity and saturable absorber, including full-optical-fiber fabry-perot inner cavity, Active Optical Fiber, isolator, saturable absorber, pumping coupler, output coupler and pumping source.The utility model is using full-optical-fiber fabry-perot inner cavity as spaced transmission peak filter in conjunction with passive mode-locking, maintain passive mode-locking fiber laser is simple and compact, be easy to make, stability is high the advantages that while substantially increase output mode-locked ultrashort pulse repetition rate, have very big development prospect and very high application value.
Description
Technical field
The utility model relates to optical fiber lasers, especially a kind of to be based on intracavitary full-optical-fiber fabry-perot chamber and satisfy
With the high repetition frequency passive mode-locking fiber laser of absorber.
Background technique
Mode locked fiber laser is with the pulse width of its ultra-narrow, the peak power of superelevation in Strong-field physics, accurate measurement, light
Learning the fields such as sensing, ranging and Precision Machining has important application.The mode that usual laser obtains mode locking pulse output have with
Lower two kinds:
One, active mode locking.In the intracavitary addition intensity of laser resonant cavity or phase-modulator, when the adjacent modulation of modulator
Time interval and the laser time that single vibrates in resonant cavity can select pulse and continuous to its in chamber when matching
Amplify and narrow, finally obtains the mode locking pulse output of narrow spaces.The shortcomings that the method is since the modulation rate of modulator limits
Final pulse width is made, and the presence of modulator can make the overall structure of laser become complicated.{ referring to Haus H
A.Mode-locking of lasers[J].IEEE Journal of Selected Topics in Quantum
Electronics,2000,6(6):1173-1185.}
Two, passive mode-locking.Bigger, the bigger absorption of light intensity of the smaller absorption of its light intensity is utilized to intracavitary addition saturable absorber
Smaller feature is modulated endovenous laser light intensity, selects light intensity the best part and is amplified simultaneously constantly by stimulated radiation
Its front and back edge is pruned, pulsewidth is narrowed, can finally obtain the mode locking pulse output of ultrashort pulsewidth, ultrahigh peak power.Referring to
Ippen E P.Principles of passive mode locking[J].Applied Physics B,1994,58(3):
159-170.}
High repetition rate mode-locked lasers optical fiber laser is in ultraprecise spectroscopy, high speed optical communication, material processing, nonlinear optical
, microtechnic and astronomical research etc. have huge potential using value.Usually obtain the output of Gao Zhongying mode-locked laser
Mode has following several:
One, it in the intracavitary oscillation of laser resonator and is vibrated primary defeated using only one pulse of common mode locked fiber laser
Out one time the characteristics of, the chopped pulse time that single vibrates in resonant cavity is by way of reducing cavity length to reducing
The time interval of the pulse of adjacent output exports the repetition rate of mode locking pulse to increase.The output mode locking pulse weight of such method
Complex frequency is limited the repetition rate for being difficult to obtain 10GHz or more by existing gain fibre length and saturable absorption body length
To influence its application in practice.{ referring to Yamashita S, Inoue Y, Hsu K, et al.A 2cm-long
fiber Fabry-Perot mode-locked laser incorporating carbon nanotubes[C]//
Conference on Lasers and Electro-Optics.Optical Society of America,2004:
CTuD7.}
Two, in the way of harmonic mode locking.Output pulse recurrence frequency, that is, single order of common mode locked fiber laser repeats
Frequency is determined by refractive index resonant cavity length in its resonant cavity:Wherein υ is output pulse recurrence frequency, and c is light
Speed, n are intracavitary medium refraction index, and L is cavity length.And by polarizing control in adjusting cavity in common mode locked fiber laser
Device or pump power processed can get the harmonic pulse that repetition rate is single order repetition rate positive integer times and export.Its principle be
When pulse polarization state changes or energy increases, single pulse will be unable to keep stablizing, it may appear that pulse division becomes several
The case where impulse cluster that a pulse flocks together and the higher hamonic wave lock for being evolved into multiple pulse constant duration distributions in turn
The case where mould pulse exports, to increase output pulse recurrence frequency.However this method its harmonic wave the case where occurring, is extremely unstable
Fixed, harmonic order is bad to be controlled and needs the time of developing, and is difficult self-starting and is obtained the output of high-order harmonic wave high repetition pulse, thus very
Hardly possible is applied in practice.{ referring to Kuang Q, Zhan L, Wang Z, et al.Up to the 1552nd Order
Passively Harmonic Mode-Locked Raman Fiber Laser[J].2015.}
Three, in the way of to intracavitary addition spaced transmission peak filter.The output pulse of common mode locked fiber laser
Repetition rate is equal to the interval of adjacent longitudinal mode in its output laser pulse spectrum, i.e.,Wherein υ is output pulse
Repetition rate, Δ υ are adjacent longitudinal mode spacing in output laser spectrum, and c is the light velocity, and n is intracavitary medium refraction index, and L is resonant cavity
Length.So can use the addition spaced transmission peak filter into resonant cavity, when adjacent transmissive is peak-to-peak just whole every being exactly equal to
It can realize that the longitudinal mode to starting of oscillation in laser selects when the adjacent longitudinal mode spacing of the output laser spectrum of several times, to increase phase
The repetition rate of output pulse is improved to realize in the interval of adjacent longitudinal mode.But the shortcomings that this method is spaced transmission peak filter
Structure is complex, and transmission peaks spacing distance matches more difficult with cavity length of the resonator chamber.{ referring to Peccianti M, Pasquazi
A,Park Y,et al.Demonstration of a stable ultrafast laser based on a nonlinear
microcavity[J].Nature communications,2012,3:765.}
Utility model content
The utility model proposes a kind of based on full on the basis of above-mentioned existing Gao Zhongying mode locked fiber laser technology
The mode locked fiber laser of optical fibre Fabry-perot inner cavity and saturable absorber high repetition frequency passive mode-locking, by all -fiber
Fabry-Perot inner cavity is combined with passive mode-locking, in the case where guaranteeing mode locking pulse short pulse duration and high-peak power feature
Improve the magnitude of output pulse recurrence frequency, and a pair of Fabry-Perot-type cavity being made of fiber bragg grating plus
Enter the all-fiber that can't break laser, makes that being easily integrated of optical fiber laser, the feature that stability is high is kept.
The laser structure is simple and compact, is easy to make, and can meet high repetition rate mode-locked lasers laser in the fields such as science and industry
Using.
The technical solution of the utility model is:
A kind of high repetition frequency passive mode-locking optical fiber based on full-optical-fiber fabry-perot inner cavity and saturable absorber is sharp
Light device, it is characterized in that: including full-optical-fiber fabry-perot inner cavity, Active Optical Fiber, isolator, saturable absorber, pumping coupling
Clutch, output coupler and pumping source.The full-optical-fiber fabry-perot inner cavity is by identical two optical fiber Bragg light
The mutual welding in the both ends of grid forms, the full-optical-fiber fabry-perot inner cavity, Active Optical Fiber, isolator, saturable absorption
Body, pumping coupler and output coupler successively join end to end, the output coupler tail end and all -fiber Fabry-Perot
The input terminal of sieve inner cavity is connected, and forms ring cavity structure, and the pumping coupler freely terminates pumping source.
The utility model can make the repetition rate breakthrough of mode-locked laser original humorous using full-optical-fiber fabry-perot inner cavity
The limitation of vibration cavity length.The cavity length of common mode-locked laser is by devices such as interacvity gain medium and saturable absorbers
Length limitation, and full-optical-fiber fabry-perot cavity length is not limited then by this, it is long to be readily available centimetres chamber, from
And promote repetition rate to GHz magnitude.
Full-optical-fiber fabry-perot tube conformation used in the utility model is simple, is readily incorporated into optical fiber mode locked laser
In resonant cavity, it will not change that optical fiber laser structure is simple, is easily integrated, the feature that stability is high.
The Active Optical Fiber can be the gain fibre of the different rare earth ions such as doping ytterbium, erbium, thulium and bismuth, be also possible to
Highly nonlinear optical fiber generates laser by the nonlinear effects such as stimulated raman scattering and optical parameter process.
The isolator is based on Faraday magneto-optical rotation effect, can guarantee laser one-way transmission in resonant cavity.
The saturable absorber can be semiconductor saturable absorbing mirror, graphene and carbon as mode-locking device
The true saturable absorber such as nanotube is also possible to the equivalent saturable absorption such as nonlinear polarization rotation and nonlinear loop mirror
Body, it introduces periodic modulation by acting on the non-linear absorption of pulse to lock the phase difference between laser longitudinal module, and
Partially absorb bigger to light intensity in pulse is weaker, the damage that the part for keeping pulse light intensity after saturable absorber bigger is subject to
Consume it is smaller, so that pulse light intensity the best part be enable to amplify by saturable absorber and by gain media, and pulse other
Part has then been depleted, and reduces the width of pulse, and then start and maintain stable continuous locking mold.
The pumping coupler is divided into two kinds: when fibre core pumps, wavelength division multiplexer can be used；When cladding pumping, it can adopt
Bundling device is bored with drawing, pump light can be efficiently introduced into laser cavity by it.
The output coupler can be fused biconical taper beam splitter or plated film beam splitter, laser can be pressed certain ratio
Example is output to outside resonant cavity.
The utility model compared with prior art, has the advantage that
One, the utility model is innovatively using full-optical-fiber fabry-perot inner cavity as spaced transmission peak filter and passive
Mode locking combines, can be with while guaranteeing the features such as output passive mode-locking pulse is narrow, peak power is high and stability is high
Repetition rate is promoted by the 10MHz magnitude of existing common laser with active-passive lock mould to GHz magnitude, can satisfy numerous needs
The needs of the disciplinary study of Gao Zhongying mode locking pulse.
Two, the utility model uses full-optical-fiber fabry-perot inner cavity to carry out modeling filter as spaced transmission peak filter
Wave can solve common mode-locked laser repetition rate and be asked by what cavity length caused by device length in resonant cavity was limited
Topic.
Three, the utility model has used the Bragg grating of all -fiber to guarantee Fabry-Perot inner cavity made of welding
The all-fiber of laser, and overall laser structure is simple and compact, be easy to make, stability is high, has high research
Potentiality and application value.
In short, the utility model ensure that optical fiber mode locked laser is original excellent while being promoted and exporting pulse recurrence frequency
Point expands its usage range significantly
Detailed description of the invention
Fig. 1 is high repetition frequency quilt of the utility model based on full-optical-fiber fabry-perot inner cavity and saturable absorber
The structural schematic block diagram of dynamic mode locked fiber laser.
Fig. 2 is the structure chart of full-optical-fiber fabry-perot inner cavity in the utility model.
Fig. 3 be the utility model used in full-optical-fiber fabry-perot inner cavity as filter when transmitance (T) with
The schematic diagram of laser frequency (υ) variation and variation, the i.e. transmission spectrum of full-optical-fiber fabry-perot filter.
Fig. 4 is for full-optical-fiber fabry-perot inner cavity in the utility model as filter to the laser determined by resonant cavity
Longitudinal mode is filtered the effect picture of modeling, and parabolic shape peak is the transmission peaks of full-optical-fiber fabry-perot inner cavity in figure, peak-to-peak
It is divided into N Δ υ, black vertical line is the laser longitudinal module determined by resonant cavity, is divided into Δ υ.
Specific embodiment
The utility model is described further with attached drawing with reference to embodiments, but the utility model should not be limited with this
Protection scope.
Referring to Fig. 1, Fig. 1 is height of the utility model based on full-optical-fiber fabry-perot inner cavity and saturable absorber
The structural schematic block diagram of repetition rate passive mode-locking fiber laser.As seen from the figure, based on full-optical-fiber fabry-perot inner cavity and
The high repetition frequency passive mode-locking fiber laser of saturable absorber, including full-optical-fiber fabry-perot inner cavity 1, active light
Fibre 2, isolator 3, saturable absorber 4, pumping coupler 5, output coupler 6 and pumping source 7 are constituted.All -fiber method cloth
In-Perot inner cavity 1, Active Optical Fiber 2, isolator 3, saturable absorber 4, pumping coupler 5, output coupler 6 successively head and the tail
It is connected, 6 tail end of output coupler is connected with the input terminal of full-optical-fiber fabry-perot inner cavity 1, forms ring cavity structure, pumping
The pump light that source 7 emits is injected in laser cavity by pumping coupler 5, and Active Optical Fiber 2 serves as laser gain medium.What is generated swashs
Light realizes mode locking by saturable absorber 4, then increases repetition rate by full-optical-fiber fabry-perot inner cavity 1, eventually by
Output coupler 6 obtains stable high repetition rate mode-locked lasers pulse output.
Please refer to Fig. 2.Fig. 2 is full-optical-fiber fabry-perot inner cavity schematic block diagram used in the utility model.As seen from the figure should
Full-optical-fiber fabry-perot inner cavity is fused to one by the fiber bragg grating 8,9 of two identical central wavelength and spectral width
It rises and constitutes, have the function of modeling filtering, transmission spectrum is as shown in Figure 3.When cavity length is in full-optical-fiber fabry-perot
Cavity length integral multiple N, i.e., the adjacent transmissive peak distance of cavity filter is the whole of laser longitudinal module interval in full-optical-fiber fabry-perot
The filtering to output laser longitudinal module, the longitudinal mode being only overlapped with full-optical-fiber fabry-perot inner cavity transmission peaks can be realized when several times N
Ability starting of oscillation amplification, so that the longitudinal mode spacing for exporting mode locking pulse be made to become larger, and then makes repetition rate become original N times,
Effect is peak-to-peak to be divided into N Δ υ as shown in figure 4, parabolic shape peak is the transmission peaks of full-optical-fiber fabry-perot inner cavity in figure, black
Color vertical line is the laser longitudinal module determined by resonant cavity, is divided into Δ υ.
The Active Optical Fiber 2 can be the gain fibre of the different rare earth ions such as doping ytterbium, erbium, thulium and bismuth, can also be with
It is highly nonlinear optical fiber, generates laser by the nonlinear effects such as stimulated raman scattering and optical parameter process.
The isolator 3 is based on Faraday magneto-optical rotation effect, can guarantee laser one-way transmission in resonant cavity.
The saturable absorber 4 is used as mode-locking device, can be semiconductor saturable absorbing mirror, graphene and carbon
The true saturable absorber such as nanotube is also possible to the equivalent saturable absorption such as nonlinear polarization rotation and nonlinear loop mirror
Body.
It is two kinds that the pumping coupler 5, which is divided to: when fibre core pumps, wavelength division multiplexer can be used；When cladding pumping, it can adopt
Bundling device is bored with drawing, pump light can be efficiently introduced into laser cavity by it.
The output coupler 6 can be fused biconical taper beam splitter or plated film beam splitter, laser can be pressed centainly
Ratio is output to outside resonant cavity.
The characteristics of the utility model is equal to its longitudinal mode spacing using mode-locked laser output pulse recurrence frequency, use all -fiber
Fabry-Perot inner cavity is as the spaced transmission peak filter in mode locked fiber laser resonant cavity, transmission spectrum such as Fig. 3 institute
Show.When cavity length is full-optical-fiber fabry-perot cavity length integral multiple N, i.e., full-optical-fiber fabry-perot inner cavity filters
Device adjacent transmissive peak distance be laser longitudinal module interval integral multiple N when can realize to output laser longitudinal module filtering, only with
The longitudinal mode ability starting of oscillation amplification that full-optical-fiber fabry-perot inner cavity transmission peaks are overlapped, thus between making the longitudinal mode of output mode locking pulse
Every becoming larger, and then repetition rate is made to become original N times, effect picture is as shown in Figure 4.
Claims (4)
1. a kind of high repetition frequency passive mode-locking fiber laser, it is characterised in that: including full-optical-fiber fabry-perot inner cavity
(1), Active Optical Fiber (2), isolator (3), saturable absorber (4), pumping coupler (5), output coupler (6) and pumping
Source (7)；The full-optical-fiber fabry-perot inner cavity (1) by identical two fiber bragg gratings the mutual welding in both ends
It forms, the full-optical-fiber fabry-perot inner cavity (1), Active Optical Fiber (2), isolator (3), saturable absorber (4), pump
Pu coupler (5) and output coupler (6) successively join end to end, the output coupler (6) tail end and all -fiber method cloth
In-input terminal of Perot inner cavity (1) is connected, ring cavity structure is formed, the pumping coupler (5) freely terminates pumping source
(7)。
2. high repetition frequency passive mode-locking fiber laser according to claim 1, it is characterised in that: all -fiber
The laser longitudinal module that Fabry-Perot inner cavity (1) generates optical fiber laser has modeling filter action.
3. high repetition frequency passive mode-locking fiber laser according to claim 1, it is characterised in that: the active light
Fine (2) are the gain fibre or highly nonlinear optical fiber for adulterating ytterbium, erbium, thulium and bismuth different rare earth ions, utilize excited Raman
It scatters with optical parameter process nonlinear effect and generates laser.
4. high repetition frequency passive mode-locking fiber laser according to claim 1, it is characterised in that: the saturable
Absorber (4) is semiconductor saturable absorbing mirror, graphene and the true saturable absorber of carbon nanotube or non-linear
Polarization rotation and the equivalent saturable absorber of nonlinear loop mirror.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920093925.3U CN209344510U (en) | 2019-01-21 | 2019-01-21 | High repetition frequency passive mode-locking fiber laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920093925.3U CN209344510U (en) | 2019-01-21 | 2019-01-21 | High repetition frequency passive mode-locking fiber laser |
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| CN209344510U true CN209344510U (en) | 2019-09-03 |
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| CN201920093925.3U Withdrawn - After Issue CN209344510U (en) | 2019-01-21 | 2019-01-21 | High repetition frequency passive mode-locking fiber laser |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111740306A (en) * | 2020-06-30 | 2020-10-02 | 华南理工大学 | 8-shaped main and auxiliary cavity structure laser capable of improving femtosecond pulse repetition rate |
| US11152757B2 (en) * | 2019-06-06 | 2021-10-19 | Coherent, Inc. | High repetition rate seed laser |
-
2019
- 2019-01-21 CN CN201920093925.3U patent/CN209344510U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11152757B2 (en) * | 2019-06-06 | 2021-10-19 | Coherent, Inc. | High repetition rate seed laser |
| CN111740306A (en) * | 2020-06-30 | 2020-10-02 | 华南理工大学 | 8-shaped main and auxiliary cavity structure laser capable of improving femtosecond pulse repetition rate |
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