CN106877126A - Compound cavity optical fibre laser and its method for realizing xenogenesis pulse format coherent modulation - Google Patents
Compound cavity optical fibre laser and its method for realizing xenogenesis pulse format coherent modulation Download PDFInfo
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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
- H01S3/05—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
- H01S3/06745—Tapering of the fibre, core or active region
-
- 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
-
- 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
Abstract
The invention discloses a kind of compound cavity optical fibre laser, including main chamber and the sub- chamber being embedded in main chamber, main chamber includes pump light source, wavelength division multiplexer, gain fibre, fiber coupler and Polarization Controller.Gain fibre is the drawing cone gain fibre with plane fiber end face in sub- chamber, and main chamber is shared gain fibre and coupled by Space Collimation and docked and realized light path and connected with sub- chamber.The main chamber of the optical fiber laser and sub- chamber can respectively produce xenogenesis pulse format based on independent pulses generation mechanism.Method the invention also discloses xenogenesis pulse format coherent modulation is realized, coherent modulation is carried out to the signal pulse that main chamber is produced by the control pulse for adjusting draw power and Polarization Controller and can realizing that sub- chamber produces, the Multiple pulse superposition state of xenogenesis pulse format composition can not only be obtained, the light field coherent modulation technology between xenogenesis pulse format can also be obtained, in pulse coding technique, full light time delay, all-optical storage and full photocontrol etc. are widely used in field.
Description
Technical field
The present invention relates to fiber laser technology field, more particularly to a kind of compound cavity optical fibre laser and its xenogenesis is realized
The method of pulse format coherent modulation.
Background technology
Multiple-pulse phenomenon is the universal phenomenon and intrinsic attribute of mode locked fiber laser operating.The mechanism of production of multiple-pulse,
Be generally considered to be dispersion, non-linear, gain, loss and in chamber the synergy of saturated absorption result, for same
One laser, can obtain multi-pulse laser by the setting of change polarization, draw power.But in the parameter regulation of laser
During, the distribution of the generation of multiple-pulse, cluster envelope structure and time domain be it is random occur, it is unpredictable, uncontrollable.
Therefore, the research work of multi-pulse laser is more in the discussion for rest on principle, seldom it is related in technology application.Most
Closely, it was recognized that introducing the filter effect or modulation function device of actively intervention in the laser, it is capable of achieving part controllable
Pulses generation.It has been reported that active intervention filter effect or the method for modulation function device have：Embedded Fabry-P é rot filters
Ripple device【Document 1.Y.L.Qi et al, Opt.Express 23,17720 (2015)】, Lyot wave filters【Document 2.S.Liu et
al,IEEE Photon.Technol.Lett.28,864(2016)】, miniature resonant cavity (microing resonator)【Document
3.M.Peccianti et al,Nat.Commun.3,765(2012)】Or Mach-Zehnder interferometers【Document 4.D.Mao
et al,Sci.Rep.3,3223(2013)】Deng.
Common multiple-pulse phenomenon, such as orphan's rain, orphan's molecule, strange ripple, the pulse cluster for being formed are by arteries and veins of the same race
Rush form composition.However, newest progress finds, same laser can not only produce the multiple-pulse of pulse format of the same race to show
As, and the multiple-pulse phenomenon of xenogenesis pulse format can be produced.The interphase interaction of xenogenesis pulse format does not show substantially
Coherence, its reason is the different transmission peaks that xenogenesis pulse format results from same transmittance function, therefore their phase
Position is difficult locking.The orphan's molecule obtained such as in figure of eight NALM cavity lasers is folded with the multiple-pulse that square wave noise like coexists
Plus state【Document 5.Y.-Q.Huang et al, Opt.Lett.41,4056 (2016)】, in annular cavity laser obtain it is normal
The Multiple pulse superposition state that rule orphan coexists with dissipative solitons【Document 6.D.Mao et al, Opt.Lett.38,3190 (2013)】,
And the Multiple pulse superposition state that the Q-switch and mode-locking obtained in composite chamber laser coexists with square wave noise like【Document 7.T.Qiao
et al,Opt.Express 24,18755(2016)】.It is only simple in time domain that these xenogenesis pulse formats coexist superposition state
Superposition, does not have obvious coherent interaction.
The content of the invention
Drawn it is an object of the present invention to provide the shared gain fibre in a kind of main chamber and sub- chamber and by being set in sub- chamber
Bore gain fibre and significantly improve the compound cavity optical fibre laser of the xenogenesis pulse format interphase interaction of laser output to solve
Certainly the deficiencies in the prior art.
It is a further object to provide the side that compound cavity optical fibre laser realizes xenogenesis pulse format coherent modulation
Method.
The present invention is achieved through the following technical solutions goal of the invention：
Compound cavity optical fibre laser, including main chamber and the sub- chamber being embedded in main chamber, main chamber include pumping light
Source, wavelength division multiplexer, gain fibre, fiber coupler and Polarization Controller, it is characterised in that：The gain fibre is with flat
The drawing of face fiber end face bores gain fibre and in sub- chamber, and main chamber and sub- chamber share gain fibre and the sky for passing through fiber end face
Between collimate coupling and docked and realized that light path is connected, thus, main chamber and sub- chamber are made by way of shared identical gain optical fiber
The structure that cavity optical fibre laser must be combined is more compact, while making sub- chamber and main chamber with draw power by adjusting Polarization Controller
Coherent modulation is realized between being based respectively on the xenogenesis pulse format that different pulses generation mechanism are produced.
Further, main chamber is annular chamber, linear cavity, figure of eight chamber, " σ " shape chamber, " % " shape chamber or " 9 " font
Any one in chamber, fiber coupler is Y types or X-type.
Further, main chamber is annular chamber and is additionally provided with fibre optic isolater and mode locker, and fiber coupler is Y types,
The pump light source is connected with the pumping signal end of wavelength division multiplexer, and the multiplex end of wavelength division multiplexer connects with an end face in sub- chamber
Connect, another end face in sub- chamber is sequentially connected fiber coupler, Polarization Controller, fibre optic isolater and mode locker, described light
The output end of fine coupler is laser output.
Further, the gain fibre is integrated type or evanescent wave type draws cone gain fibre；The evanescent wave type draws cone
It by the heating of gain fibre by drawing cone system to draw and boring and break is a pair of optical tapers that gain fibre is, reuses fiber coupling
System causes that two fusing optical tapers are close to each other, and two optical tapers include cone segments and non-cone segments, and optical taper core diameter is small
In 10 μm, optical taper cone length is 0.1~3cm, and two dislocation spatial joint clearances of optical taper are 10~300 μm；The one
It is to make optical fiber draw cone process interlude core diameter to diminish by drawing cone system a gain fibre heating that type draws cone gain fibre
But do not break and be made.
Further, the first hysteroscope and the second hysteroscope formed by smooth plane fiber end face are provided with the sub- chamber,
The light reflectivity of the first hysteroscope and the second hysteroscope is 20%~40%.Sub- chamber cavity mirrors reflectivity is to determine that can main chamber same with sub- chamber
Can Shi Qizhen and the prerequisite that produce independent xenogenesis pulse format simultaneously, such as sub- chamber cavity mirrors reflectivity too big, it will makes
The gain competition ability for obtaining sub- chamber is stronger than the gain competition ability of main chamber, causes only sub- chamber energy starting of oscillation, and such as fruit chamber hysteroscope
Reflectivity is too small, it will so that the gain competition ability in sub- chamber is weaker than the gain competition ability of main chamber, cause only main chamber to rise
Shake.
Further, first hysteroscope and the second hysteroscope constitute Fabry-P é rot chambers.
Further, main chamber is that semiconductor saturated absorption mirror is additionally provided with linear cavity and sub- chamber, and semiconductor saturation is inhaled
Receive mirror to be connected with the non-drawing tapered end stickup of gain fibre, fiber coupler is X-type, two output ends connection shape of fiber coupler
Into a closed loop, an input as whole laser output end, another input believes with the pumping of wavelength division multiplexer
Number end connection, the multiplex end of wavelength division multiplexer is sequentially connected Polarization Controller and sub- chamber hysteroscope, and the gain fibre is integrated type
Or evanescent wave type draws cone gain fibre.
Further, the splitting ratio of the fiber coupler is 90:10~60:40, the semiconductor saturated absorption mirror with
Fiber coupler respectively constitutes two hysteroscopes of main chamber.
Further, the mode locker is any in material saturated absorbing body mode locker or class saturated absorbing body mode locker
Plant or combination；The material saturated absorbing body mode locker is Graphene, CNT, black phosphorus, topological insulator, vulcanization
Thing series two-dimensional material, selenides series two-dimensional material, semiconductor saturated absorbing body material, nanowires of gold one-dimensional material, Yin Na
The solid materials with optics saturated absorption such as rice noodles one-dimensional material, alcohol or composite ink；The class saturation is inhaled
Acceptor mode locker is by nonlinear polarization rotation technology (NPR), non-linear loop mirror technology (NOLM) or non-linear amplifying ring
The class saturated absorption that road mirror technology (NALM) is realized.
The method that above-mentioned compound cavity optical fibre laser realizes xenogenesis pulse format coherent modulation, comprises the following steps：
S1, the non-cone end face of gain fibre and the polishing end face of single-mode fiber carried out into Space Collimation dock to imitate thang-kng
Rate is more than 62%, then carries out the sub- chamber that colloidal sol stickup is cured to form stabilization；
The crushing strength of S2, the handle angle of rotatory polarization controller and handle, and adjust draw power make main chamber with son
The laser pulse in chamber has identical wavelength, so that xenogenesis pulse format produces Resonant Interaction；
S3, change optical taper cone and overlap section length and cone degree of delaying and produce sub- chamber changing the pulse parameter that sub- chamber produces
Raw control pulse carries out dynamic control to the signal pulse that main chamber is produced.
The compound cavity optical fibre laser that the present invention is provided, has the advantages that：
1st, main chamber is embedded with sub- chamber, the two shared gain media and is produced simultaneously based on independent pulses generation mechanism respective
Pulse format, pulse parameter that sub- chamber produces (such as repetitive rate, pulsewidth, time domain can be changed by changing the parameter in sub- chamber
Spatial distribution), and then the dynamic control of the signal pulse that the control pulse that sub- chamber produces is produced to main chamber is realized, realize co-wavelength
The multi-pulse laser coherent superposition state that constitutes of xenogenesis pulse format, solve pulse format of the same race because it is difficult to quickly and accurately
Tell the problem that control pulse forms the accurate light field control that multiple-pulse coherent superposition state cannot be realized with signal pulse；
2nd, drawing cone is carried out to the highly doped gain media in Fabry-P é rot chambers, enhanced polarization, non-thread can be obtained
Property and filter effect, polarization-gain filtering draws awl chamber to be not only exaggerated pulse, inhibit noise, and also enhances light pulse
Nonlinear effect, further enhancing the interaction between xenogenesis pulse format, to realize and be difficult to reality in existing laser
The relevant effect of existing xenogenesis pulse format is manipulated with resonance, when the interaction between pulse is in resonance state, its mutual beam
It is more strong when the ability tie up, mutually drawn is than incoherent state, good light field manipulation effect can be reached.
Brief description of the drawings
Fig. 1 is the structural representation of the compound cavity optical fibre laser embodiment 1 of the present invention；
Fig. 2 is the structural representation of the compound cavity optical fibre laser embodiment 2 of the present invention；
Fig. 3 is the structural representation of the compound cavity optical fibre laser embodiment 3 of the present invention；
Wherein：1-pump light source, 2-wavelength division multiplexer, 3a-evanescent wave type draws cone gain fibre, 3b-one-piece type drawing
Cone gain fibre, 4-sub- chamber, 5a-the first hysteroscope, 5b-the second hysteroscope, 6-fibre optic isolater, 7a-the first Polarization Control
Device, 7b-the second Polarization Controller, 8-fiber coupler, 9-mode locker, 10-laser output, 11-semiconductor saturation
Absorbing mirror.
Specific embodiment
Embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings.
In compound cavity optical fibre laser of the invention, pump light source, wavelength division multiplexer, fibre optic isolater, Polarization Controller,
Fiber coupler and gain fibre use commercial devices, are 1000nm, 1310nm, 1550nm and 2000nm according to operation wavelength
The requirement of wave band, can respectively correspond to and Nd is mixed in gain fibre3+、Yb3+、Pr3+、Er3+Or Tm3+。
Embodiment 1
As shown in figure 1, compound cavity optical fibre laser, including main chamber and the sub- chamber 4 that is embedded in main chamber, main chamber includes pumping
Light source 1, wavelength division multiplexer 2, gain fibre, fiber coupler 8 and Polarization Controller, gain fibre are with plane fiber end face
Drawing cone gain fibre and in sub- chamber 4, main chamber shares gain fibre and the Space Collimation coupling for passing through fiber end face with sub- chamber 4
Conjunction is docked and is realized light path and connected.
Wherein, main chamber is annular chamber and to be additionally provided with fibre optic isolater 6 and mode locker 9, in order that relevant effect become apparent,
Experimental implementation regulation more two Polarization Controllers of easy setting, fiber coupler 8 is Y types, pump light source 1 and wavelength division multiplexer
2 pumping signal end connection, the multiplex end of wavelength division multiplexer 2 is connected with an end face in sub- chamber 4, another end face in sub- chamber 4
It is sequentially connected fiber coupler 8, the first Polarization Controller 7a, fibre optic isolater 6, the second Polarization Controller 7b and mode locker 9, light
The output end of fine coupler 8 is whole laser output 10, and the formed by smooth plane fiber end face is provided with sub- chamber 4
The light reflectivity of one hysteroscope 5a and the second hysteroscope 5b, the first hysteroscope 5a and the second hysteroscope 5b is 20%~40%, the first hysteroscope 5a
Fabry-P é rot chambers are constituted with the second hysteroscope 5b.
Additionally, gain fibre is evanescent wave type drawing cone gain fibre 3a, it is by one that evanescent wave type draws cone gain fibre 3a
Gain fibre heating is a pair of optical tapers by drawing cone system to draw and boring and break, and reuses fiber coupling system so that two fusing
Optical taper is close to each other, and two optical tapers include cone segments and non-cone segments, and optical taper core diameter is less than 10 μm, optical taper cone
Length is 0.1~3cm, and two dislocation spatial joint clearances of optical taper are 10~300 μm；Based on evanescent wave transmission theory, light wave will
Another gain fibre cone is coupled into from a gain fibre cone, the cone degree of delaying and cone of optical taper overlap the ginseng of section length
Number selection, can produce different fiber birefringence parameters, and birefringence parameter is up to 10-6~10-5Between magnitude, so that light
Ripple by different cone parameters optical taper when different polarization characteristics are presented, because the physical dimension of tapered fiber compares single mode
Optical fiber is much smaller, causes the nonlinear factor of optical fiber and strengthens.
Mode locker 9 is material saturated absorbing body mode locker, is the Graphene with optics saturated absorption, and its effect is
Self-starting light pulse is produced based on optics saturated absorption in the laser, optics saturated absorption mode-locking device can be by physics
Ultrasonic disperse is made optical thin film or optics saturated absorption material is deposited on fiber end face by thermophoresis method and is obtained；Locked mode
Device 9 can also use class saturated absorbing body mode locker, using between two Polarization Controllers place a Polarization-Sensitive optical fiber every
From the combination of device 6, its physical function is to produce class saturated absorption effect, i.e., because light wave is inclined when light wave is operated in the laser
Polarization state develops and make about showing as the nonlinear polarization rotation phenomenon that light wave develops, Polarization-Sensitive fibre optic isolater 6 with intensity
For the discriminator of polarized lightwave intensity can realize the saturated absorption effect to special polarization state light wave, so as to produce in the laser
Starting impulse is conigenous, so, the combination that a Polarization-Sensitive fibre optic isolater 6 is placed between two Polarization Controllers is just formed
Equivalent mode locker 9, now the material mode locker in laser can remove or retain, but if fibre optic isolater 6 is inclined
Shaken insensitive, and class saturated absorption can not be then constituted with two Polarization Controllers, the material mode locker one in laser
Surely to exist.
The method for realizing xenogenesis pulse format coherent modulation using the compound cavity optical fibre laser of the present embodiment, including it is following
Step：
S1, the non-cone end face of gain fibre and the polishing end face of single-mode fiber carried out into Space Collimation dock to imitate thang-kng
Rate is more than 62%, main chamber is had suitable gain competition ability, the energy starting of oscillation simultaneously of two chambers with sub- chamber 4, then carry out colloidal sol stickup
It is cured to form the sub- chamber 4 of stabilization；
The crushing strength of handle angle and handle in S2, rotation the first Polarization Controller 7a and the second Polarization Controller 7b,
And adjusting draw power makes main chamber have identical wavelength with the laser pulse in sub- chamber 4, so that xenogenesis pulse format is produced altogether
Shake interaction；
S3, change optical taper cone and overlap section length and cone degree of delaying and produce sub- chamber changing the pulse parameter that sub- chamber produces
Raw control pulse carries out dynamic control to the signal pulse that main chamber is produced.
Wherein, the pulses generation mechanism of main chamber is the class saturated absorption based on NPR, and the pulses generation machine in sub- chamber 4
System is the class saturated absorption that Gain filter is formed with the synergy of nonlinear effect, and main chamber and sub- chamber are based on each independent
Pulses generation mechanism produce different pulse formats respectively, and select the sub- chamber 4 of different accesses (to select different sub- chambers 4
The slow degree of cone and the cone coupling length of middle gain fibre cone) the different sub- chamber pulse of physical parameter can be obtained；
The polarization that regulation Polarization Controller can change in laser is set so that main chamber is different with what sub- chamber 4 each produced
Pulse format is planted to produce overlap in time domain, there is identical wavelength on frequency domain.When the different pulses that main chamber and sub- chamber 4 produce
When the time domain that stabilization is there is when form is operated in the laser is overlapped, be there is directly based on nonlinear effect xenogenesis pulse
Relevant effect, relevant effect between this xenogenesis pulse and light field control are by changing the power of pump light source and dynamic
It is adjustable, when xenogenesis pulse format has identical wavelength and identical phase difference, the phase interaction between xenogenesis pulse format
With will in resonance coherency states, so, sub- chamber 4 produce pulse format just to main chamber produce another pulse format carry out phase
Dry modulation and light field control.
Embodiment 2
As shown in Fig. 2 being with the difference of embodiment 1, the gain fibre in Fabry-P é rot chambers is integrated type
Gain fibre bores 3b, and one-piece type drawing cone gain fibre 3b is optical fiber is being drawn cone by drawing cone system a piece gain fibre heating
Process interlude core diameter diminishes but does not break and be made, and optical taper core diameter is 20~80 μm, one-piece type to draw cone gain fibre 3b phases
Draw cone gain fibre 3a its preparation technology relatively easy than evanescent wave type and be lost it is small, without to tapered fiber cone to carrying out space
Dislocation coupling, but integrated type gain fibre awl chamber equally has enhanced non-linear, polarization effect and filter effect.
The method and embodiment 1 of xenogenesis pulse format coherent modulation are realized using the compound cavity optical fibre laser of the present embodiment
It is identical.
Embodiment 3
As shown in figure 3, compound cavity optical fibre laser, including main chamber and the sub- chamber 4 that is embedded in main chamber, main chamber includes pumping
Light source 1, wavelength division multiplexer 2, gain fibre, fiber coupler 8 and Polarization Controller, gain fibre are with plane fiber end face
Drawing cone gain fibre and in sub- chamber 4, main chamber shares gain fibre with sub- chamber 4, and main chamber is also to be set in linear cavity and sub- chamber 4
There is semiconductor saturated absorption mirror 11, semiconductor saturated absorption mirror 11 is pasted with the non-drawing tapered end of gain fibre and is connected, fiber coupling
Device 8 is X-type, and two output ends of fiber coupler 8 connect to form a closed loop, and an input is defeated as whole laser
Go out end 10, another input is connected with the pumping signal end of wavelength division multiplexer 2, the multiplex end of wavelength division multiplexer 2 is sequentially connected
Polarization Controller and sub- chamber hysteroscope, gain fibre are that evanescent wave type draws cone gain fibre 3a.
Wherein, the splitting ratio of fiber coupler 8 is 90:10~60:40, semiconductor saturated absorption mirror 11 is main chamber and sub- chamber
4 common hysteroscope, semiconductor saturated absorption mirror 11 respectively constitutes two hysteroscopes of main chamber, semiconductor saturation with fiber coupler 8
Absorbing mirror 11 and plane fiber end face respectively constitute the first hysteroscope 5a and the second hysteroscope 5b in Fabry-P é rot chambers, the first chamber
The light reflectivity of mirror 5a and the second hysteroscope 5b is 20%~40%, additionally, semiconductor saturated absorption mirror 11 also makes as mode locker
Obtain laser and be produced from starting impulse.
The method and embodiment 1 of xenogenesis pulse format coherent modulation are realized using the compound cavity optical fibre laser of the present embodiment
It is identical.
Above-described is only some embodiments of the present invention.For the person of ordinary skill of the art, not
On the premise of departing from the invention design, various modifications and improvements can be made, these belong to protection model of the invention
Enclose.
Claims (10)
1. be combined cavity optical fibre laser, including main chamber and the sub- chamber that is embedded in main chamber, main chamber include pump light source,
Wavelength division multiplexer, gain fibre, fiber coupler and Polarization Controller, it is characterised in that the gain fibre is with plane
The drawing of fiber end face bores gain fibre and in sub- chamber, and main chamber and sub- chamber share gain fibre and the space for passing through fiber end face
Collimation coupling is docked and is realized light path and connected.
2. compound cavity optical fibre laser according to claim 1, it is characterised in that main chamber be annular chamber, linear cavity,
Figure of eight chamber, any one in " σ " shape chamber, " % " shape chamber or " 9 " font chamber, fiber coupler is Y types or X-type.
3. compound cavity optical fibre laser according to claim 2, it is characterised in that main chamber is annular chamber and is additionally provided with
Fibre optic isolater and mode locker, fiber coupler are Y types, and the pump light source is connected with the pumping signal end of wavelength division multiplexer,
The multiplex end of wavelength division multiplexer is connected with an end face in sub- chamber, and another end face in sub- chamber is sequentially connected fiber coupler, partially
Shake controller, fibre optic isolater and mode locker, and the output end of described fiber coupler is laser output.
4. compound cavity optical fibre laser according to claim 3, it is characterised in that the gain fibre is integrated type or suddenly
The wave mode that dies draws cone gain fibre；
The evanescent wave type draw cone gain fibre be by a gain fibre heating be a pair by drawing cone system to draw and boring and break
Optical taper, reuses fiber coupling system so that two fusing optical tapers are close to each other, two optical tapers include cone segments and
Non- cone segments, optical taper core diameter is less than 10 μm, and optical taper cone length is 0.1~3cm, two dislocation spatial joint clearances of optical taper
It is 10~300 μm；
It is described that one-piece type to draw cone gain fibre be that by drawing cone system the heating of piece gain fibre is made into optical fiber during cone is drawn
Between section core diameter diminish but do not break and be made, optical taper core diameter be 20~80 μm.
5. compound cavity optical fibre laser according to claim 2, it is characterised in that be provided with the sub- chamber by smooth flat
The light reflectivity of the first hysteroscope and the second hysteroscope that face fiber end face is formed, the first hysteroscope and the second hysteroscope is 20%~40%.
6. compound cavity optical fibre laser according to claim 5, it is characterised in that first hysteroscope and the second hysteroscope structure
Into Fabry-P é rot chambers.
7. compound cavity optical fibre laser according to claim 2, it is characterised in that main chamber is in linear cavity and sub- chamber
Semiconductor saturated absorption mirror is additionally provided with, semiconductor saturated absorption mirror is pasted with the non-drawing tapered end of gain fibre and is connected, fiber coupling
Device is X-type, and two output ends of fiber coupler connect to form a closed loop, an input as whole laser output
End, another input is connected with the pumping signal end of wavelength division multiplexer, and the multiplex end of wavelength division multiplexer is sequentially connected polarization control
Device processed and sub- chamber hysteroscope, the gain fibre is integrated type or evanescent wave type draws cone gain fibre.
8. compound cavity optical fibre laser according to claim 7, it is characterised in that the splitting ratio of the fiber coupler is
90:10~60:40, the semiconductor saturated absorption mirror respectively constitutes two hysteroscopes of main chamber with fiber coupler.
9. compound cavity optical fibre laser according to claim 3, it is characterised in that the mode locker is material saturated absorption
Any one in body mode locker or class saturated absorbing body mode locker or combination；
The material saturated absorbing body mode locker is Graphene, CNT, black phosphorus, topological insulator, sulfide series two dimension
Material, selenides series two-dimensional material, semiconductor saturated absorbing body material, nanowires of gold one-dimensional material, the one-dimensional material of nano silver wire
The solid materials with optics saturated absorption such as material, alcohol or composite ink；
The class saturated absorbing body mode locker is by nonlinear polarization rotation technology (NPR), non-linear loop mirror technology
(NOLM) or it is non-linear amplify loop mirror technology (NALM) realize class saturated absorption.
10. the compound cavity optical fibre laser described in any one of claim 1-9 claim realizes the relevant tune of xenogenesis pulse format
The method of system, it is characterised in that comprise the following steps：
S1, the non-cone end face of gain fibre and the polishing end face of single-mode fiber carried out into Space Collimation dock to make throughput big
In 62%, then carry out the sub- chamber that colloidal sol stickup is cured to form stabilization；
The crushing strength of S2, the handle angle of rotatory polarization controller and handle, and adjust draw power and make main chamber with sub- chamber
Laser pulse has identical wavelength, so that xenogenesis pulse format produces Resonant Interaction；
S3, change optical taper cone and overlap section length and cone degree of delaying and make what sub- chamber produced changing the pulse parameter that sub- chamber produces
Control pulse carries out dynamic control to the signal pulse that main chamber is produced.
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