CN109449734A - A kind of multichannel coherent anti-stokes raman scattering optical fiber source that all risk insurance is inclined - Google Patents
A kind of multichannel coherent anti-stokes raman scattering optical fiber source that all risk insurance is inclined Download PDFInfo
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- CN109449734A CN109449734A CN201811554179.XA CN201811554179A CN109449734A CN 109449734 A CN109449734 A CN 109449734A CN 201811554179 A CN201811554179 A CN 201811554179A CN 109449734 A CN109449734 A CN 109449734A
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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
- H01S3/06712—Polarising fibre; Polariser
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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
- H01S3/10—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
- H01S3/1112—Passive mode locking
- H01S3/1115—Passive mode locking using intracavity saturable absorbers
- H01S3/1118—Semiconductor saturable absorbers, e.g. semiconductor saturable absorber mirrors [SESAMs]; Solid-state saturable absorbers, e.g. carbon nanotube [CNT] based
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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
- H01S3/23—Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media
- H01S3/2308—Amplifier arrangements, e.g. MOPA
- H01S3/2325—Multi-pass amplifiers, e.g. regenerative amplifiers
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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
- H01S3/30—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range using scattering effects, e.g. stimulated Brillouin or Raman effects
- H01S3/302—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range using scattering effects, e.g. stimulated Brillouin or Raman effects in an optical fibre
Abstract
The present invention provides a kind of multichannel coherent anti-stokes raman scattering optical fiber source that all risk insurance is inclined, including the inclined main laser of all risk insurance, image intensifer, beam splitter and multiple from laser, it is described that gain fibre is equipped with from laser, it exports after the pulse laser amplification that the image intensifer exports main laser to beam splitter, amplified pulse laser is divided into multi beam by the beam splitter, wherein a bundle of pulsed laser directly exports, remaining pulse laser is separately input into each from laser, nonlinear effect occurs using from the gain fibre in laser, the pulse laser exported after each generation nonlinear effect from laser successively closes beam after delay and obtains combined beam light, it is exported after a branch of pulse laser beam combining that the combined beam light is directly exported with main laser, wherein, main laser, image intensifer, beam splitter and multiple from laser It is connected between device using all risk insurance polarized light fibre optical path, to obtain the synchronization multichannel ultrashort pulse of high-precision, high stable.
Description
Technical field
The present invention relates to ultra-fast opticals and laser technology field, and in particular to a kind of this relevant anti-support of the multichannel that all risk insurance is inclined
Gram this Raman diffused light fibre source.
Background technique
Coherent anti-stokes raman scattering technology can realize nothing according to the vibrational-rotational level difference of different material molecule
Intrusion, the detection of non-marked are widely used in biomedical imaging, burning field analysis, pharmacokinetics, disease detection and early stage
The fields such as prevention.Traditional coherent anti-stokes raman scattering light source depends critically upon Ti:Sapphire laser and solid optical parametric oscillation
Device can only export the double-colored synchronous ultra-short pulse laser for single vibrational-rotational level.Solid light source system complex, it is bulky,
Environmental disturbances are sensitive, need the optics super-clean environment of constant temperature and humidity that could run well, this just greatly limits this relevant anti-support
A possibility that gram this Raman scattering techniques move towards clinical medicine from laboratory.In addition, traditional coherent light source is only
The double-colored ultrashort pulse of two wavelength can be generated for some specific vibrational-rotational level, and in the application such as biomedical imaging, it is
The content and evolutionary process of the fat of tissue visualization or cell interior, protein, nucleic acid simultaneously, there is an urgent need to multiple vibrations
Turn energy level to carry out while detecting.
Optical fiber laser is small in size, light-weight, environment resistant interference performance is strong, gradually replaces solid light in many occasions
Source is applied to numerous industrial processes and national defense applications field.The especially development of polarization maintaining optical fibre light source, by optical fiber own temperature,
The birefringence effect of stress is offset by the method for refractive index modulation, greatly improves optical fiber source in complex environment
Stability.These advantages for benefiting from optical-fiber laser realize double-colored synchronous ultrashort pulse using optical-fiber laser, are expected to be concerned with anti-
Stokes Raman scattering pushes clinical application to from laboratory.Currently, be based on optical-fiber laser, commonly generate it is double-colored synchronize it is ultrashort
The method of pulse is based primarily upon photonic crystal fiber, using the high non-linearity effect of photonic crystal fiber, realizes optical maser wavelength
Conversion, for example, can be using modes such as four-wave mixing, soliton self-frequency sh, super continuous spectrums, still, these modes have limitation.Four
The transfer efficiency of wave mixing is lower, even if also can only achieve 5% or so parameter transform efficiency by way of feedback amplification；
Soliton self-frequency sh must could be occurred in the medium of negative index, cause generate optical maser wavelength be limited in 1250nm with
On；Although the mode of super continuous spectrums can obtain the spectrum in broadband, the power density of each spectral component is lower, proposes to detection
It is more to require, in addition, various nonlinear effects contend with one other in super continuous spectrums spreading process, cause spectrum coherence by
It influences, is unfavorable for coherent detection.
In view of huge applications of all risk insurance Channel Synchronous laser on the high side in terms of coherent anti-stokes raman scattering imaging
Prospect, and the limitation of optical-fiber laser and frequency convener technology in terms of stability, transfer efficiency, power spectral density at this stage
Property, development can self-starting longtime running, have high stability energy, realize multi-channel synchronous ultrashort pulse output full polarization
Fibre laser has become the technological difficulties currently urgently broken through.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of multichannel coherent anti-stokes raman scatterings that all risk insurance is inclined
Optical fiber source, it is compact-sized, performance is stable, polarization-maintaining output, reliably and with long-term, wavelength is abundant, multiple vibrations can be excited to turn energy simultaneously
Grade.
In order to solve the above technical problems, the present invention provides a kind of multichannel coherent anti-stokes raman scattering that all risk insurance is inclined
Optical fiber source, it is described to be set from laser including the inclined main laser of all risk insurance, image intensifer, beam splitter and multiple from laser
It exports after thering is gain fibre, the pulse laser that the image intensifer exports main laser to amplify to beam splitter, the beam splitter
Amplified pulse laser is divided into multi beam, wherein a bundle of pulsed laser directly exports, remaining pulse laser is separately input into
It is each that nonlinear effect occurs using from the gain fibre in laser from laser, it is each non-linear from laser generation
The pulse laser exported after effect successively closes beam after delay and obtains combined beam light, and the combined beam light is directly exported with main laser
A branch of pulse laser beam combining after export, wherein main laser, image intensifer, beam splitter and multiple used between laser
The connection of all risk insurance polarized light fibre optical path.
The inclined multichannel coherent anti-stokes raman scattering optical fiber source of all risk insurance, by the pouring-in method of synchronization, according to
Rely the non-linear ultrafast modulation effect between polychrome ultrashort pulse, obtains the synchronization multichannel ultrashort pulse of high-precision, high stable.
The design of all -fiber optical path guarantees that multi-channel laser transmission and interaction are bound and carry out in a fiber, avoids by sky
Between alignment, optical path caused by lens reflecting deviate, it helps entire light-source system volume does smaller, more adaptation clinical medicine
The needs of detecting instrument.It is the main laser, image intensifer, beam splitter, inclined using all risk insurance from laser and all -fiber optical path
Optical fiber and device so as to which light source is greatly improved for the anti-interference ability of environment temperature, mechanical shock, and export high contrast
Polarization laser.The pulse laser that main laser issues is injected into from laser, and nonlinear effect occurs in gain fibre,
It realizes ultrafast modulation effect, will be forced in the repetition rate state for being fixed on main laser from the operating status of laser, compared with
Traditional electronic synchronizer mode, precision are higher.
The core mechanism of technical solution of the present invention is specifically by gain fibre, by the phase tune between polychrome pulse
System is converted to intensity modulated, is equivalent to main laser " drive " from laser and carries out mode locking, the injected pulse laser of main laser
It by nonlinear effect, participates in the mode locking process of laser, realizes synchronous polychrome ultrashort pulse output.It crosses herein
Cheng Zhong, environmental change can introduce different phases to small sample perturbations caused by two lasers in the pulse of two lasers
Modulation can carry out in various degree the mode locking of polychrome lock-out pulse due to the interaction of nonlinear effect and effect of dispersion
It influences, and then the central wavelength of double-colored pulse is suitably adjusted, eventually by the variation of group velocity, compensate environmental change
Interference, realizes the self- recoverage and self-stabilization of synchronous regime.In addition, the nonlinear effect of optical fiber is a kind of ultrafast phenomena, when response
Between picosecond, even femtosecond magnitude, this High Speed Modulation and feedback mechanism can carry out the high frequency noise content in environmental disturbances
Effective compensation improves synchronization accuracy.
In the technical solution of the present invention, principal and subordinate's laser is that the ultrafast tune of ultra-fast nonlinear occurs by one section of gain fibre
Production, this section of gain fibre is placed in laser, shares same section of gain relative to traditional principal and subordinate's laser
For the mode of optical fiber, the method for operation of main laser will not change with the state of this section of interaction optical fiber, have
Conducive to the long-time stability for improving main laser.From the mode-lock status of laser and power, the pulsewidth of main laser injected pulse
Etc. parameters it is closely related, main laser is multi-channel laser system necessary condition steady in a long-term steadily in the long term.Therefore, originally
Invention proposes this only in the mode that non-linear ultrafast modulation effect occurs from laser, is conducive to the long-term of raising system
Stability.
Respectively there is one section of gain fibre in technical solution of the present invention, in principal and subordinate's laser chamber, is respectively used to principal and subordinate's laser
Mode locking can pass through flexible choice gain fibre type (optical fiber for such as mixing ytterbium, mixing bait, mixing thulium, mix holmium element), gain fibre
Length, gain fibre doping concentration realize the synchronous laser of polychrome of different wave length, different gains coefficient, different output power.Together
When, the structure of non-common gain fibre, moreover it is possible to inhibit unfavorable non-thread such as gain narrowing, the spontaneous radiation of amplification, gain competition
Property effect, improves the stability of output power.
The technical solution adopted by the present invention flexibly can be vibrated, amplify and be synthesized with optical-fiber laser mature at this stage
Technology combine, realize multi-wavelength, multichannel, high power, high-precision synchronous light source, be especially suitable for high-resolution Raman spectrum
Analysis and light spectrum image-forming.By multiple schemes for exporting multiple wavelength from laser, it can guarantee each Raman energy to be measured
Grade is all responsible for excitation from laser by independent, avoids some from the abnormal shadow to whole system of laser output state
It rings.By the way that delays time to control is added from laser each, can accurate manipulation each from laser wavelength and main laser wave
Long time domain delay, can be extended to time-multiplexed mode, so that each wavelength is at the time of specific and sample to be tested phase
Interaction can be realized the timesharing detection of different vibrational-rotational levels in this way, help to study pharmacokinetics, new old
Metabolic process etc..
Preferably, including multiple wavelength division multiplexers, the pulse laser carry out conjunction beam by wavelength division multiplexer.
Preferably, described to be terminated with optical time delay unit from the output of laser, the pulse laser exported from laser passes through light
It is delayed after delayer.
Preferably, the main laser is mode locking pulse optical fiber laser, and mode locking mode is active mode locking and passive lock
Any one of mould.
Preferably, it is described from laser be mode locking pulse optical fiber laser, mode locking mode is passive mode-locking.
The invention has the following advantages:
1, the present invention structure inclined using all risk insurance, either principal and subordinate's laser, beam splitting beam merging apparatus or synchronously control mould
Block, the polarization state for all benefiting from polarization maintaining optical fibre are stablized, and that realizes multi-channel synchronous laser stablizes output, become to ambient temperature
Change, insensitive, the strong antijamming capability of vibration interference, practicability is good.
2, the present invention realizes multi-wavelength multi-pass by the pouring-in method of synchronization of main laser from laser using multiple
The synchronization light source output in road can detect, instead according to the demand of biomedical imaging, while to DNA, protein and fat
Mirror cell interior metabolism, the more information that disease develops, it is feature-rich.
3, the present invention uses all optical fibre structure, can greatly reduce the volume of laser light source, facilitate and integrate entire optical path
To in the space of very little, stability is improved, the use being suitble under the complex environments such as clinical medicine.
4, the non-linear ultrafast modulation effect the present invention is based on injection laser and from laser in the gain medium, realizes multi-pass
The precision synchronous of road ultrashort pulse, the response speed of nonlinear effect quickly, reach picosecond even femtosecond magnitude, can greatly
Synchronous precision is improved, realizes the high-precise synchronization pulse of several orders of magnitude higher than the former electronic circuit method of synchronization.Multichannel
The synchronization accuracy of laser reaches femtosecond magnitude.
5, the present invention use non-linear ultrafast modulation effect, be based on gain fibre non-linear ultrafast modulation effect and
The dispersion interaction of intracavitary conduction optical fiber, due to the peak power clamping effect of ultrashort pulse, non-linear ultrafast modulation effect and color
Scattered to act on the state for being in a kind of dynamic equilibrium always, this can be when external environment be interfered, and Active Compensation disturbance reaches
To long-term locking, the synchronization target of self-stabilization.
6, the pouring-in method of synchronization that the present invention uses, the operating status of main laser are not done completely by from laser
It disturbs, therefore can guarantee the operating steady in a long-term of main laser, and then improve the stability of whole system.
7, the pouring-in method of synchronization that uses of the present invention, benefits from non-linear ultrafast modulation effect, principal and subordinate's laser it is same
Step mismatch length can be close to centimetres, while stability is greatly improved, lumen type complexity be also reduced, so that from laser
Cavity length matching can be can be realized by directly fused optical fiber without optical time delay unit inside device, reach precise synchronization, multichannel,
The synchronization of multi-wavelength ultra-short pulse laser can be realized in full optical fiber laser.
8, after main laser is exported pulse amplifying by the present invention, it is injected separately into different in laser, Mei Gecong
Laser all with main laser mutually locking, has determining phase difference, can be realized the synchronization light source of multichannel.
9, the gain media of principal and subordinate's laser of the present invention is independent of one another, can by using different types of gain media
Realize the multichannel pulse laser of multiple wave bands, multiple parameters.Principal and subordinate's Laser synchronisation of the present invention can be cascaded to multichannel, even
The precise synchronization of the ultra-short pulse laser of network type manipulates.
10, the present invention realizes multiple wave bands, multichannel ultra-short pulse laser be synchronous to be suitable for picosecond, the ultrashort arteries and veins of femtosecond
Impulse light, particularly, the mode-locked laser for the narrow spectrum width that can be used for having intracavitary spectral filtering, coherent anti-stokes raman scattering at
Application of the non-linear imaging technique of picture in terms of biomedical imaging need to guarantee the optical maser wavelength for accurately manipulating narrow spectral line
To realize the high-resolution detection of different vibrational-rotational levels, the regulatable mode-locked laser of frequency spectrum has simultaneously provided very easily technology way
Diameter.
11, the present invention realize multiple wave bands, the synchronization of multichannel ultra-short pulse laser can by nonlinear frequency conversion, such as
Frequency doubling non-linear and frequency, difference frequency, non-linear frequency mixing etc. and non-linear spectrum broadening etc. obtain broader frequency spectrum covering model
It encloses and frequency spectrum tuning range；The higher ultrashort pulse of time-frequency domain signal-to-noise ratio can also be obtained by nonlinear optical process.
12, multiple wave bands, the multichannel ultra-short pulse laser that the present invention realizes synchronize the anti-stoke that can be applied to be concerned with
This Raman scattering imaging, the coherent anti-stokes raman scattering imaging of surface enhanced, stimlated Raman spectrum imaging, light comb are non-thread
Property light spectrum image-forming etc..
Detailed description of the invention
Fig. 1 is the structural principle block diagram of the inclined multichannel coherent anti-stokes raman scattering optical fiber source of all risk insurance；
Fig. 2 is that the inclined multichannel coherent anti-stokes raman scattering optical fiber source of all risk insurance is swashed using Linear-Cavity as principal and subordinate
The structural schematic diagram of light device；
Fig. 3 is that the inclined multichannel coherent anti-stokes raman scattering optical fiber source of all risk insurance is swashed using nine word chambers as principal and subordinate
The structural schematic diagram of light device；
Fig. 4 is specific implementation effect picture of the invention.
Specific embodiment
As shown in Figure 1, the inclined multichannel coherent anti-stokes raman scattering laser light source of all risk insurance includes a main laser
Device, an image intensifer, a 1:(N+1 that 1 beam incident light is divided into N+1 beam light) beam splitter, it is N number of from laser (be denoted as from
Laser 1, from laser 2 ..., from laser N) and it is N number of be used to close beam wavelength division multiplexer (be denoted as WDM1,
WDM2,……,WDMN).The input terminal of the output end connection image intensifer of main laser, the output end of image intensifer connect 1:(N
+ 1) input terminal of beam splitter, in the road the N+1 output end of beam splitter, wherein output end is directly with wavelength division multiplexer WDMN's all the way
One input terminal is connected, and in addition the road N output end is separately connected N number of from laser.Each one is connected from the output end of laser
Optical time delay unit, N number of optical time delay unit be denoted as optical time delay unit 1, optical time delay unit 2 ..., optical time delay unit N, optical time delay unit be used to adjust from
The delay of laser output pulse.Connection between above-mentioned all devices and device all uses polarization maintaining optical fibre.
The main laser is mode locking pulse optical fiber laser, and mode locking mode can be active mode locking or passive lock
Mould, main laser use passive mode-locking mode when, specific lumen type can be Linear-Cavity, annular chamber, eight word chambers, nine word chambers or
Nonlinear amplifying loop mirror chamber.
It is described from laser be mode locking pulse optical fiber laser, mode locking mode is passive mode-locking, and specific lumen type can be
Linear-Cavity, annular chamber, eight word chambers, nine word chambers or nonlinear amplifying loop mirror chamber.
The optical time delay unit is made of polarization maintaining optical fiber collimator, is realized by adjusting the distance between polarization maintaining optical fiber collimator
Accurate delay control, optical time delay unit can also be made of devices such as electrooptic modulator, birefringece crystals, to realize the essence of delay
Really control.
N number of output light from laser, it is real by each optical time delay unit (1~optical time delay unit N of optical time delay unit) respectively
Then accurate delay on present time successively closes beam by N-1 wavelength division multiplexer (WDM1~WDMN-1), spatially closes
Together, the pulse laser for the main laser all the way that last and image intensifer directly exports closes beam by wavelength division multiplexer WDMN, real
Existing all risk insurance channel coherent anti-stokes raman scattering laser output on the high side.
Embodiment 1
In the present embodiment, principal and subordinate's laser all uses linear cavity structure, as shown in Fig. 2, main laser includes pumping laser
Device LD-M, gain fibre Yb-M, wavelength division multiplexer WDM-M, saturable absorber SESAM, fiber grating FBG-M and output coupling
Device OC-M.The output end of main laser connects image intensifer, image intensifer include pump laser LD-A, doped fiber Yb-A,
Wavelength division multiplexer WDM-A and isolator OI-A.The central wavelength of main laser is 1030nm, pulse width 30ps, output work
Rate is 5mW, and the pulse laser of main laser output is after image intensifer, and central wavelength and pulse width are constant, output power
It is amplified to 1W.Amplified pulse laser passes through 1:(N+1) beam splitter OC is divided into the road N+1, wherein pulse laser is directly defeated all the way
Enter in wavelength division multiplexer WDMN, other road N pulse lasers input N number of from laser respectively.It is N number of to swash from laser including pumping
Light device LD-S1, LD-S2 ..., LD-SN, wavelength division multiplexer WDM-S1, WDM-S1 ', WDM-S2, WDM-S2 ' ...,
WDM-SN, WDM-SN ', doped fiber Er-S1, Er-S2 ..., Er-SN, saturable absorber SESAM-S1, SESAM-
S2 ..., SESAM-SN, output coupler OC-S1, OC-S2 ..., OC-SN, fiber grating FBG-S1, FBG-
S2,......,FBG-SN.It is each all to use linear cavity structure from the cavity structure of laser, for from laser 1: wavelength-division
Multiplexer WDM-S1 signal end connects beam splitter OC, and pumping end connects saturable absorber SESAM-S1, common end connection doping
Optical fiber Er-S1, wavelength division multiplexer WDM-S1 ' signal end connect output coupler OC-S1, and pumping end connects pump laser LD-
S1, common end connect doped fiber Er-S1, fiber grating FBG-S1 connection output coupler OC-S1.Saturable absorber
For realizing mode locking, fiber grating FBG-S1 is used to select the output wavelength from laser 1, output coupler OC- SESAM-S1
S1 is used to realize the output from laser 1.The pulse laser of pump laser LD-S1 output passes through WDM-S1 ' and is applied to doping
On optical fiber Er-S1, beam splitter OC output at the same time wherein pulse laser is applied to by wavelength division multiplexer WDM-S1 all the way
On doped fiber Er-S1, play the role of booster action to from the mode locking of laser 1, therefore can be in non-linear ultrafast modulation
Lower realization precision synchronous.N number of N number of optical time delay unit being separately connected from the output end of laser includes polarization maintaining optical fiber collimator
Cols-S1, Cols-S2 ..., Cols-SN, polarization maintaining optical fiber collimator Cols-S1, Cols-S2 ..., Cols-SN use
In the delay for adjusting the pulse laser each exported from laser.Wavelength division multiplexer is directly output to after image intensifer amplifies
The pulse laser all the way of WDMN, and the road N exported respectively through each optical time delay unit again after each output from laser respectively
Pulse laser, by wavelength division multiplexer WDM1, WDM2 ..., WDMN-1, WDMN successively close beam, specifically: multiple by wavelength-division
With device WDM1 by the pulse laser exported from laser 1 and the pulse laser beam combining exported from laser 2, pass through wavelength division multiplexer
The pulse laser beam combining of the pulse laser exported from laser 3 and wavelength division multiplexer WSM1 output is passed through wavelength-division multiplex by WDM2
The pulse laser beam combining that device WDM3 exports the pulse laser exported from laser 4 and wavelength division multiplexer WSM2 ..., pass through
Wavelength division multiplexer WDMN-1 closes the pulse laser of the pulse laser exported from laser N and wavelength division multiplexer WSMN-2 output
Beam will be directly output to the pulse all the way of wavelength division multiplexer WDMN finally by wavelength division multiplexer WDMN after image intensifer amplifies
The pulse laser beam combining of laser and wavelength division multiplexer WSMN-1 output, finally realizes the anti-stoke of all risk insurance pantal coherence in N number of channel
This Raman scattering light source, obtain all -fiber, all risk insurance partially, the synchronization multichannel ultrashort pulse of high-precision, high stable.
In the present embodiment, the central wavelength of wherein three fiber gratings from laser can be set to
1458nm, 1476nm, 1488nm, using these three wavelength as the wherein three road stokes light in multichannel, with main laser
1030nm is as pump light, then three road stokes lights correspond to 1/1030nm-1/1458nm=after intersecting respectively with pump light
2850cm-1, 1/1030nm-1/1476nm=2930cm-1, 1/1030nm-1/1488nm=2980cm-1Wave-number difference, this is just
It is the characteristic area of fat, albumen and DNA in cell.In this way, only with a set of integrated multichannel light source, it can be to different features
Peak is detected, and the investigative range of non-linear bio-imaging is improved.
Embodiment 2
In the present embodiment, principal and subordinate's laser all uses nine word cavity configurations, as shown in figure 3, main laser includes pumping laser
Device LD-M, gain fibre Er-M, wavelength division multiplexer WDM-M, phase-shifter PS-M, fiber grating FBG-M, output coupler OC-M,
OC-M'.The output end of main laser connects image intensifer, and image intensifer includes pump laser LD-A, doped fiber Er-A, wave
Division multiplexer WDM-A, isolator OI-A, the central wavelength of main laser are 1550nm, pulse width 30ps, and output power is
5mW, for the pulse laser of main laser output after image intensifer, central wavelength and pulse width are constant, output power amplification
To 1W.Amplified pulse laser passes through 1:(N+1) beam splitter OC is divided into the road N+1, wherein pulse laser directly inputs wave all the way
In division multiplexer WDMN, other road N laser input N number of from laser respectively.It is N number of from laser include pump laser LD-
S1, LD-S2 ..., LD-SN, wavelength division multiplexer WDM-S1, WDM-S1 ', WDM-S2, WDM-S2 ' ..., WDM-SN,
WDM-SN ', doped fiber Yb-S1, Yb-S2 ..., Yb-SN, phase-shifter PS-S1, PS-S2 ..., PS-SN, export coupling
Clutch OC-S1, OC-S1 ', OC-S2, OC-S2 ' ..., OC-SN, OC-SN ', fiber grating FBG-S1, FBG-
S2,......,FBG-SN.Each cavity structure from laser all uses nine word cavity configurations, for from laser 1: wavelength-division
Multiplexer WDM-S1 signal end connects beam splitter OC, pumps end through phase-shifter PS-S1 connection output coupler OC-S1, common end
Doped fiber Yb-S1, fiber grating FBG-S1 connection output coupler OC-S1 are connected, wavelength division multiplexer WDM-S1 ' signal end connects
Output coupler OC-S1 ' is met, pumping end connects pump laser LD-S1, and common end connects doped fiber Yb-S1, output coupling
Device OC-S1 ' is connected with output coupler OC-S1.Fiber grating FBG-S1 is used to select the output wavelength from laser 1, output
Coupler OC-S1 ' is used to realize the output from laser 1.The pulse laser of pump laser LD-S1 output passes through WDM-S1 '
Be applied on doped fiber Yb-S1, at the same time beam splitter OC output wherein all the way pulse laser pass through wavelength division multiplexer
WDM-S1 is applied on doped fiber Yb-S1, plays booster action to from the mode locking of laser 1, therefore can be non-linear super
Precision synchronous is realized under the action of fast modulation.N number of N number of optical time delay unit being separately connected from the output end of laser includes polarization-maintaining light
Fine collimator Cols-S1, Cols-S2 ..., Cols-SN, polarization maintaining optical fiber collimator Cols-S1, Cols-S2 ...,
Cols-SN is used to adjust the delay of the pulse laser each exported from laser.Wave is directly output to after image intensifer amplifies
The pulse laser all the way of division multiplexer WDMN, and it is defeated through each optical time delay unit respectively again after each output from laser respectively
The road N pulse laser out, by wavelength division multiplexer WDM1, WDM2 ..., WDMN-1, WDMN successively close beam, specifically: logical
Wavelength division multiplexer WDM1 is crossed by the pulse laser exported from laser 1 and the pulse laser beam combining exported from laser 2, passes through wave
Division multiplexer WDM2 passes through the pulse laser beam combining of the pulse laser exported from laser 3 and wavelength division multiplexer WSM1 output
Wavelength division multiplexer WDM3 closes the pulse laser of the pulse laser exported from laser 4 and wavelength division multiplexer WSM2 output
Beam ..., the pulse laser exported from laser N and wavelength division multiplexer WSMN-2 are exported by wavelength division multiplexer WDMN-1
Pulse laser beam combining, wavelength division multiplexer will be directly output to after image intensifer amplifies finally by wavelength division multiplexer WDMN
The pulse laser beam combining of pulse laser all the way and wavelength division multiplexer the WSMN-1 output of WDMN, finally realizes all risk insurance in N number of channel
Pantal coherence anti-Stokes Raman scatters light source, and acquisition all -fiber, all risk insurance is inclined, the synchronization multichannel of high-precision, high stable is ultrashort
Pulse.
In the present embodiment, the central wavelength of wherein three fiber gratings from laser can be set to
1075nm, 1066nm, 1060nm, using these three wavelength as the wherein three road pump light in multichannel, with main laser
1550nm is as stokes light, then three road pump lights correspond to 1/1075nm-1/ after intersecting respectively with stokes light
1550nm=2850cm-1, 1/1066nm-1/1550nm=2930cm-1, 1/1060nm-1/1550nm=2980cm-1Wave number
Difference, this is exactly the characteristic area of fat, albumen and DNA in cell, in this way, only with a set of integrated multichannel light source, it can be right
Different characteristic peaks are detected, and the investigative range of non-linear bio-imaging is improved.
Fig. 4 is the specific implementation effect picture of four-way coherent anti-stokes raman scattering laser light source, can from Fig. 4
Out, the ultrafast laser of four-way coherent anti-stokes raman scattering laser light source output realizes in the time domain accurate same
Step.
Claims (6)
1. a kind of multichannel coherent anti-stokes raman scattering optical fiber source that all risk insurance is inclined, it is characterised in that: inclined including all risk insurance
Main laser, image intensifer, beam splitter and multiple from laser, described that gain fibre is equipped with from laser, the light is put
Output is to beam splitter after the pulse laser amplification that big device exports main laser, and the beam splitter is amplified pulse laser point
At multi beam, wherein a bundle of pulsed laser directly exports, remaining pulse laser be separately input into it is each from laser, using from
Nonlinear effect occurs for the gain fibre in laser, each that the pulse laser exported after nonlinear effect warp occurs from laser
It crosses after delay and successively closes beam and obtain combined beam light, it is defeated after a branch of pulse laser beam combining that the combined beam light is directly exported with main laser
Out, wherein main laser, image intensifer, beam splitter and it is multiple between laser use all risk insurance polarized light fibre optical path connect.
2. the inclined multichannel coherent anti-stokes raman scattering optical fiber source of all risk insurance according to claim 1, feature
Be: including multiple wavelength division multiplexers, the pulse laser carries out conjunction beam by wavelength division multiplexer.
3. the inclined multichannel coherent anti-stokes raman scattering optical fiber source of all risk insurance according to claim 1, feature
Be: described to be terminated with optical time delay unit from the output of laser, the pulse laser exported from laser prolongs after optical time delay unit
When.
4. the inclined multichannel coherent anti-stokes raman scattering optical fiber source of all risk insurance according to claim 1, feature
Be: the main laser is mode locking pulse optical fiber laser, and mode locking mode is any in active mode locking and passive mode-locking
Kind.
5. the inclined multichannel coherent anti-stokes raman scattering optical fiber source of all risk insurance according to claim 1, feature
Be: it is described from laser be mode locking pulse optical fiber laser, mode locking mode is passive mode-locking.
6. the inclined multichannel coherent anti-stokes raman scattering optical fiber source of all risk insurance according to claim 1, feature
Be: the phase-modulation between polychrome pulse is converted to intensity modulated by the gain fibre, be equivalent to main laser drive from
Laser carries out mode locking, and the injected pulse laser of main laser participates in the mode locking process from laser by nonlinear effect
In the middle, synchronous polychrome ultrashort pulse output is realized, in the process, environmental change is disturbed to small caused by two lasers
It is dynamic, different phase-modulations can be introduced in the pulse of two lasers, due to the phase interaction of nonlinear effect and effect of dispersion
With, can the mode locking to polychrome lock-out pulse carry out different degrees of influence, and then the central wavelength of double-colored pulse is carried out it is appropriate
It adjusts, eventually by the variation of group velocity, compensates the interference of environmental change, realize the self- recoverage and self-stabilization of synchronous regime.
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