CN107134712B - A kind of passive mixed mode-locking optical fiber laser of master with temperature-compensating - Google Patents
A kind of passive mixed mode-locking optical fiber laser of master with temperature-compensating Download PDFInfo
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- CN107134712B CN107134712B CN201710492366.9A CN201710492366A CN107134712B CN 107134712 B CN107134712 B CN 107134712B CN 201710492366 A CN201710492366 A CN 201710492366A CN 107134712 B CN107134712 B CN 107134712B
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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
- H01S3/1109—Active mode locking
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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
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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
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
- H01S3/1305—Feedback control systems
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Abstract
A kind of passive mixed mode-locking optical fiber laser of master with temperature-compensating of the invention belongs to the technical field of optic communication device, and primary structure includes the Active Mode-locked Fiber Laser resonant cavity being made of devices such as pump light source (1), wavelength division multiplexer (2), the first photo-coupler (3), adjustable optic fibre filters (4);The temperature compensation system being made of devices such as dehydrated alcohol filling photonic crystal fiber (27), third optical detector (28), the second amplifying circuits (29);And the pulse optimization system that the passive mode-locking fiber laser system being made of devices such as dispersion compensating fiber (22), black phosphorus saturable absorbers (21) and two feedback control loops are constituted.The present invention carries out automatic feedback control to actively and passively mode locked fiber laser system using main passive mixed mode-locking, using feedback technique respectively, and has temperature compensation function, optimizes the light pulse in system more, stablizes.
Description
Technical field
The invention belongs to the technical field of optic communication device, in particular to a kind of master with temperature-compensating passively mixes lock
Mode fiber laser.
Background technique
The national economic development is rapid, and the information age has arrived, and Fibre Optical Communication Technology has penetrated into various command, control, communications, and informations
In network.Optical fiber laser is the perfect light source of fiber optic communication, has many advantages compared with traditional solid state laser, in recent years
To have obtained extensive research.Mode locked fiber laser in optical fiber laser is the ideal choosing of light-pulse generator in optical communication system
It selects.
The common structure of mode locked fiber laser has active mode locking and passive mode-locking fiber laser.Wherein active mode locking light
Fibre laser output pulse width is narrow, frequency chirp is small and frequency-tunable, thus has in Ultra-High Speed Optical Communication very big
Application prospect.
It is Active Mode-locked Fiber Laser system as shown in Fig. 2 with the immediate prior art of the present invention, sinusoidal electricity
Press signal function in lithium niobate (LiNbO3) modulator, modulator will generate periodic phase change or loss, periodical
Variation act on the pulse of resonance cavity circulation, influencing each other between them is so that generate mode locking sequence.LiNbO3Modulation
Device be it is Polarization-Sensitive, a Polarization Controller is placed usually before modulator to adjust the light field polarization state of modulator.Center
Wavelength is adjusted by tunable optic filter.
But the spectrum that Active Mode-locked Fiber Laser exports laser is narrow, hardly results in Ultra-short pulse, and actively lock
The chamber of mode fiber laser is long general all longer, is easy to be caused its stability poor by external influence.
Passive mode-locking fiber laser structure is simple, at low cost and high reliablity, is real all-fiber devices, utilizes light
Fine nonlinear effect can produce shortest optical pulse, but its stability for exporting pulse recurrence frequency is poor, cannot be extraneous
Regulation.
In conclusion intrinsic disadvantage is individually present in existing actively or passively mode locked fiber laser system at present,
Especially because effective automatic control is not taken in existing mode locked fiber laser system, so that the stability of output optical pulse
It is affected by environmental factors such as temperature.
Summary of the invention
The technical problem to be solved by the present invention is to, overcome in background technique mode locked fiber laser there are the shortcomings that, provide
The passive mixed mode-locking fiber ring laser system of a kind of master with temperature-compensating, with energy under the conditions of environment temperature is continually changing
For the purpose of enough generating stable ultrahigh speed pulse.
Technical scheme is as follows:
A kind of passive mixed mode-locking optical fiber laser of master with temperature-compensating, structure have, pump light source 1 and the 5th light
The input terminal of coupler 25 is connected, and 90% output end of the 5th photo-coupler 25 is connected with the end 980nm of wavelength division multiplexer 2, wave
The end 1550nm of division multiplexer 2 is connected with the input terminal of the first photo-coupler 3;10% output end of the first photo-coupler 3 with can
The input terminal for dimming fiber filter 4 is connected, the input terminal phase of 90% output end and third photo-coupler 11 of the first photo-coupler 3
Even;The output end of adjustable optic fibre filter 4 is connected with the input terminal of the lithium niobate modulator 5 driven by microwave source 6;Lithium niobate tune
The output end of device 5 processed is connected with the one end for the optical fiber being wrapped on the first PZT piezoelectric ceramics 7;Described is wrapped in the first PZT pressure
The other end of optical fiber on electroceramics 7 is connected with an input terminal of the second photo-coupler 8;Second photo-coupler 8 another
Input terminal is connected with the input terminal of the first optoisolator 9;One end phase of the output end of first optoisolator 9 and Er-doped fiber 10
Even, the other end of Er-doped fiber 10 is connected with the common end of wavelength division multiplexer 2;
It is characterized in that, there are also the input terminals of 40% output end of third photo-coupler 11 and the 4th photo-coupler 12 for structure
It is connected, 60% output end of third photo-coupler 11 is as the passive mixed mode-locking optical fiber of a kind of master with temperature-compensating
The output port of laser;One 50% output end of the 4th photo-coupler 12 is connected with the input terminal of the first optical detector 13,
Another 50% output end is connected with the input terminal of the second optical detector 15;The output end of first optical detector 13 and the first amplification
The input terminal of circuit 14 is connected, and the output end of the first amplifying circuit 14 is connected with an input terminal of add circuit 30, addition electricity
The output end on road 30 is connected with the input terminal of piezoelectric ceramic actuator 31, the output end and PZT piezoelectricity of piezoelectric ceramic actuator 31
Ceramics 7 are connected;10% output end of the 5th photo-coupler 25 is connected with an input terminal of the 6th photo-coupler 26, the 6th optocoupler
Another input terminal of clutch 26 is connected with one end of dehydrated alcohol filling photonic crystal fiber 27, and dehydrated alcohol fills photonic crystal
The other end of optical fiber 27 is connected with an output end of the 6th photo-coupler 26, another output end of the 6th photo-coupler 26 and
The input terminal of three optical detectors 28 is connected, and the output end of third optical detector 28 is connected with the input terminal of the second amplifying circuit 29,
The output end of second amplifying circuit 29 is connected with another input terminal of add circuit 30;The output end of second optical detector 15 with
The input terminal of A/D converter 16 is connected, and the output end of A/D converter 16 is connected with single-chip microcontroller 17, and one of single-chip microcontroller 17
Serial ports is connected with the first electrical level transferring chip 18, the RS232 interface of the first electrical level transferring chip 18 and adjustable optic fibre delay line 19
It is connected, the output end of adjustable optic fibre delay line 19 is connected with 50% output end of the second photo-coupler 8, the second photo-coupler
8 another 50% output end is connected with the input terminal of the second optoisolator 23, the output end of the second optoisolator 23 and dispersion
One end of compensated optical fiber 22 is connected, and the other end of dispersion compensating fiber 22 is connected with one end of black phosphorus saturable absorber 21;It is black
The other end of phosphorus saturable absorber 21 is connected with one end of single mode optical fiber 20, and the other end and the adjustable optic fibre of single mode optical fiber 20 prolong
The input terminal of slow line 19 is connected;Another serial ports of single-chip microcontroller 17 is connected with second electrical level conversion chip 24, second electrical level conversion
Chip 24 is connected with the RS232 interface of adjustable optic fibre filter 4.
The utility model has the advantages that
1, the present invention generates the output of high speed ultrashort light pulse using main passive mixed mode-locking fiber ring laser system structure, can
To overcome passive mode-locking fiber laser system to be unable to control the disadvantage of output pulse recurrence frequency and repetition rate stability difference,
Playing passive mode-locking fiber laser system can produce the advantage of femtosecond light pulse;Active mode-locked fiber can be overcome simultaneously
The disadvantage of Optical Maser System output stability difference, it is adjustable excellent that mode locked fiber laser system of taking the initiative exports repetition rate
Gesture makes whole system generate stable ultrashort high-speed optical pulse.
2, the present invention is long using the stable Active Mode-locked Fiber Laser system chamber of feedback signal control piezoelectric ceramics, overcomes chamber
Long drift stablizes system output;Adjustable optic fibre delay line is controlled using feedback signal simultaneously, Time-delayed Feedback is carried out, makes system
In light pulse more optimize, so that whole system is generated stable ultrashort high-speed optical pulse.
3, New Two Dimensional material black phosphorus is carried out passive mode-locking as saturable absorber and generates ultrashort high-speed light by the present invention
Pulse, the saturable absorber based on black phosphorus have ultrashort recovery time, and black phosphorus material has the band structure of direct band gap, inhales
The advantages that wave-length coverage is big is received, can produce femtosecond ultrashort pulse.
4, the present invention has temperature compensation function, can compensate automatically Active Mode-locked Fiber Laser according to variation of ambient temperature
The long variation of system chamber keeps output soliton pulses more stable.
5, the configuration of the present invention is simple exports laser using optical detector receiving portion, is controlled using singlechip feedbsck adjustable
Fibre delay line realizes the optimization of whole system output pulse, easy to operate and can reach accurate control.
6, the present invention can use adjustment of the single-chip microcontroller control adjustable optic fibre filter realization to output soliton shape, from
And it is more advantageous to the self-starting of fiber ring laser system.
Detailed description of the invention:
Fig. 1 is a kind of passive mixed mode-locking fiber ring laser system block diagram of master with temperature-compensating of the invention.
Fig. 2 is traditional Active Mode-locked Fiber Laser system block diagram.
Specific embodiment
With reference to the accompanying drawing, illustrate the specific structure of each section optical path of the present invention.In embodiment, the subsequent bracket of component
The preferred parameter of the invention of middle mark, but protection scope of the present invention is not limited by these parameters.
Embodiment 1: specific structure of the invention
A kind of master with temperature-compensating of the invention is passive, and mixed mode-locking optical fiber laser structure is as shown in Fig. 1,
Structure has, pump light source 1 (980nm laser, peak power output 1W) and 25 (1 × 2 standard single mode light of the 5th photo-coupler
Coupler, splitting ratio 10:90) input terminal be connected, 90% output end of the 5th photo-coupler 25 and wavelength division multiplexer 2
The end 980nm of (980/1550nm wavelength division multiplexer) is connected, the end 1550nm of wavelength division multiplexer 2 and the first photo-coupler 3 (1 × 2
Standard single mode photo-coupler, splitting ratio 10:90) input terminal be connected;10% output end and tunable optical of first photo-coupler 3
The input terminal of fiber filter 4 (the WLTF-BE adjustable optic fibre filter of Beijing Prism Technology Co., LTd., CTC (Centell Technology Corporation) production) is connected,
The light pulse of output continues to run in Active Mode-locked Fiber Laser resonant cavity, 90% output end of the first photo-coupler 3 with
The input terminal of third photo-coupler 11 (1 × 2 standard single mode photo-coupler, splitting ratio 40:60) is connected;Adjustable optic fibre filter
4 output end and the (MX-LN- of Shanghai Han Yu Fibre Optical Communication Technology Co., Ltd of lithium niobate modulator 5 driven by microwave source 6
20 light intensity modulators) input terminal be connected;It the output end of lithium niobate modulator 5 and is wrapped on the first PZT piezoelectric ceramics 7
One end of optical fiber is connected;The other end of the optical fiber being wrapped on the first PZT piezoelectric ceramics 7 and the second photo-coupler 8 (2
× 2 standard single mode photo-couplers, splitting ratio 50:50) an input terminal be connected;Another input of second photo-coupler 8
End is connected with the input terminal of the first optoisolator 9 (1550nm polarization independent optical isolator), and the first optoisolator 9 makes in system
Light pulse unidirectional operation, direction are the clockwise directions of attached drawing 1;The output end of first optoisolator 9 and the 10 (U.S. of Er-doped fiber
Nufern company production SM-ESF-7/125 Er-doped fiber) one end be connected, the other end and wavelength-division multiplex of Er-doped fiber 10
The common end of device 2 is connected.Above structure constitutes traditional Active Mode-locked Fiber Laser resonant cavity.
For the present invention on the basis of traditional Active Mode-locked Fiber Laser resonant cavity, there are also be based on black phosphorus saturable absorption
The passive mode-locking fiber laser system of body, the temperature compensation system based on dehydrated alcohol filling photonic crystal fiber, Yi Jiyou
The pulse optimization system that two automatic feedback control rings are constituted, structure is 40% output end of third photo-coupler 11 and the 4th
The input terminal of photo-coupler 12 (1 × 2 standard single mode photo-coupler, splitting ratio 50:50) is connected, third photo-coupler 11
Output port of 60% output end as the passive mixed mode-locking optical fiber laser of a kind of master with temperature-compensating, system
Thus port exports for the light pulse of generation;13 (Beijing of 50% output end and the first optical detector of 4th photo-coupler 12
The LSIPD-LD50 type optical detector of quick Micron Technology Co., Ltd) input terminal be connected, another 50% output end and the second light
The input terminal of detector 15 (the LSIPD-LD50 type optical detector of the quick Micron Technology Co., Ltd in Beijing) is connected;First optical detector
13 output end is connected with the input terminal of the first amplifying circuit 14, the output end of the first amplifying circuit 14 and the one of add circuit 30
A input terminal is connected, the output end and piezoelectric ceramic actuator 31 (the homemade device of this seminar, specific structure of add circuit 30
See patent ZL200710055865.8) input terminal be connected, the output end of piezoelectric ceramic actuator 31 and the (circle of PZT piezoelectric ceramics 7
Cylindricality piezoelectric ceramics, outer diameter 50mm, internal diameter 40mm, high 50mm) it is connected, to control the length of resonant cavity;5th photo-coupler 25
10% output end and the 6th photo-coupler 26 (2 × 2 standard single mode photo-couplers, splitting ratio 50:50) an input terminal
It is connected, another input terminal of the 6th photo-coupler 26 is connected with one end of dehydrated alcohol filling photonic crystal fiber 27, anhydrous second
Alcohol fills photonic crystal fiber 27 (by the airport of the PM-1550-01 photonic crystal fiber of NKT Photonics company production
Filling dehydrated alcohol constitute) the other end be connected with an output end of the 6th photo-coupler 26, the 6th photo-coupler 26 it is another
The input terminal of one output end and third optical detector 28 (the LSIPD-LD50 type optical detector of the quick Micron Technology Co., Ltd in Beijing)
It is connected, the output end of third optical detector 28 is connected with the input terminal of the second amplifying circuit 29, the output of the second amplifying circuit 29
End is connected with another input terminal of add circuit 30;The output end and A/D converter 16 (MAX197) of second optical detector 15
Input terminal be connected, the output end of A/D converter 16 is connected with single-chip microcontroller 17 (STC12C5A60S2 single-chip microcontroller), single-chip microcontroller 17
It receiving digital quantity and carries out calculation processing, a serial ports of single-chip microcontroller 17 is connected with the first electrical level transferring chip 18 (MAX232), the
The one electrical level transferring chip 18 and (VDL-40-15-S9-1- of Sichuan space fixed star Micron Technology Co., Ltd of adjustable optic fibre delay line 19
The electronic fibre delay line of FA type) RS232 control terminal be connected, make adjustable optic fibre delay line 19 receive control signal, be delayed
One of feedback, the light pulse that systems stabilisation generates, the output end of adjustable optic fibre delay line 19 and the second photo-coupler 8 is 50% defeated
Outlet is connected, (the unrelated optical isolation of 1550nm polarization of another 50% output end of the second photo-coupler 8 and the second optoisolator 23
Device) input terminal be connected, the second optoisolator 23 allows light pulse to be the counter clockwise direction of attached drawing 1 by direction;Second light every
One end phase of output end and dispersion compensating fiber 22 (the DCF38 type dispersion compensating fiber of THORLABS company, the U.S.) from device 23
Even, (this seminar makes by oneself, and multilayer black phosphorus is produced on one for the other end of dispersion compensating fiber 22 and black phosphorus saturable absorber 21
On the end face of optical fiber connector, this connector is connected with the fibre-optical splice of the other side with optical fiber connector, optical fiber connector can
Using Shanghai Han Yu Fibre Optical Communication Technology Co., Ltd produce standard FC/PC optical fiber connector) one end be connected;Black phosphorus can satisfy
Be connected with the other end of absorber 21 with one end of single mode optical fiber 20 (standard single-mode fiber), the other end of single mode optical fiber 20 with can
The input terminal of fibre delay line 19 is adjusted to be connected.Another serial ports of single-chip microcontroller 17 and second electrical level conversion chip 24 (MAX232) phase
Even, second electrical level conversion chip 24 is connected with the RS232 interface of adjustable optic fibre filter 4, to control the spectrum for passing through its light pulse
Width, to adjust the shape of mode locked fiber laser output optical pulse.
The effect of the course of work of the invention of embodiment 2 and each main component
In attached structure shown in FIG. 1, laser pumping source of the pump light source 1 as whole system, pump light source 1 passes through the 5th
Photo-coupler 25, a part of (90%) output are entered in system by wavelength division multiplexer 2;Splitting ratio is the first optocoupler of 10:90
The laser of intracavitary operation is divided into two parts by clutch 3, and a part of (90%) output is to third photo-coupler 11, another part
(10%) continue to run in Active Mode-locked Fiber Laser resonant cavity;The third photo-coupler 11 that splitting ratio is 40:60 is by the
The laser of one photo-coupler 3 output is divided into two parts, and a part of (60%) is exported as the laser of whole system, another part
(40%) it is output to feedback signal of the 4th photo-coupler 12 as system;Adjustable optic fibre filter 4 in control system for swashing
The spectral width of light, and then change the shape of output soliton pulses, another serial ports and second electrical level of single-chip microcontroller 17 are converted
Chip 24 is connected, and second electrical level conversion chip 24 is connected with the RS232 interface of adjustable optic fibre filter 4, so as to utilize monolithic
Machine 17 realizes the control to adjustable optic fibre filter 4;First optoisolator 9 is for guaranteeing Active Mode-locked Fiber Laser resonant cavity
The unidirectional operation of middle light;Er-doped fiber 10 generates gain effect in systems, guarantees that the energy of operation laser in resonant cavity does not wane
Subtract;Splitting ratio is that the second photo-coupler 8 of 50:50 is connected to active mode locking and passive mode-locking two-part structure, is made based on black phosphorus
Passive mode-locking fiber laser system and Active Mode-locked Fiber Laser system based on PZT combine, it is real
Now lead passive mixed mode-locking;Black phosphorus saturable absorber 21 is that black phosphorus material is fabricated to saturable absorber, super for mode locking
The generation of short pulse.10% output end of the 5th photo-coupler 25 is connected with an input terminal of the 6th photo-coupler 26, and the 6th
Another input terminal of photo-coupler 26 is connected with one end of dehydrated alcohol filling photonic crystal fiber 27, and dehydrated alcohol fills photon
The other end of crystal optical fibre 27 is connected with an output end of the 6th photo-coupler 26, another output end of the 6th photo-coupler 26
It is connected with the input terminal of third optical detector 28, it is a temperature sensor that dehydrated alcohol, which fills photonic crystal fiber 27, works as ring
Border temperature can cause to generate variation by the phase of its laser when changing, and then change the output electricity of third optical detector 28
Stream, then an input terminal of the output to add circuit 30 after the amplification of the second amplifying circuit 29.
4th photo-coupler 12 will receive light and be divided into two-way, be exported all the way to the first optical detector 13, be visited by the first light
It surveys device 13 and converts optical signals to electric signal, after the amplification of the first amplifying circuit 14, export to the another of add circuit 30
A input terminal, add circuit 30 is by the output signal of the second amplifying circuit 29 (reflection temperature change) and the first amplifying circuit 14
Output will be received to piezoelectric ceramic actuator 14, piezoelectric ceramic actuator 14 after output signal (variation of reflection output intensity) is added
To signal amplification for driving PZT piezoelectric ceramics 7, and then control the length for the optical fiber being entangled on PZT piezoelectric ceramics 7 to actively
Mode locked fiber laser resonant cavity carries out the long compensation of chamber, guarantees the reliability of system mode locking.
The another output that 4th photo-coupler 12 exports gives the second optical detector 15, and the second optical detector 15 is converted
The delay of feedback of the passive mode-locking fiber laser system based on black phosphorus saturable absorber is used for for electric current;A/D converter
16 receive the electric signal of the second optical detector 15 output, and convert analog signals into digital signal, and single-chip microcontroller 17 receives analog/digital
The digital signal that converter 16 exports carries out calculation processing, and generates control signal, and the first electrical level transferring chip 18 is for connecting
One serial ports of single-chip microcontroller 17 and the RS232 control terminal of adjustable optic fibre delay line 19;Adjustable optic fibre delay line 19 is set to receive monolithic
The control signal of machine 17 carries out time delay feed back control, and the light pulse for exporting whole system is optimized.
Claims (1)
1. a kind of passive mixed mode-locking optical fiber laser of master with temperature-compensating, structure have, pump light source (1) and the 5th light
The input terminal of coupler (25) is connected, the end the 980nm phase of 90% output end and wavelength division multiplexer (2) of the 5th photo-coupler (25)
Even, the end 1550nm of wavelength division multiplexer (2) is connected with the input terminal of the first photo-coupler (3);The 10% of first photo-coupler (3)
Output end is connected with the input terminal of adjustable optic fibre filter (4), 90% output end and third optical coupling of the first photo-coupler (3)
The input terminal of device (11) is connected;The output end of adjustable optic fibre filter (4) and the lithium niobate modulator driven by microwave source (6)
(5) input terminal is connected;One end phase of the output end of lithium niobate modulator (5) and the optical fiber being wrapped on PZT piezoelectric ceramics (7)
Even;One input terminal phase of the other end of the optical fiber being wrapped on PZT piezoelectric ceramics (7) and the second photo-coupler (8)
Even;Another input terminal of second photo-coupler (8) is connected with the input terminal of the first optoisolator (9);First optoisolator (9)
Output end be connected with one end of Er-doped fiber (10), the common end of the other end of Er-doped fiber (10) and wavelength division multiplexer (2)
It is connected;
It is characterized in that, there are also the input terminals of 40% output end of third photo-coupler (11) and the 4th photo-coupler (12) for structure
It is connected, 60% output end of third photo-coupler (11) is as the passive mixed mode-locking light of a kind of master with temperature-compensating
The output port of fibre laser;One 50% output end of the 4th photo-coupler (12) and the input terminal of the first optical detector (13)
It is connected, another 50% output end is connected with the input terminal of the second optical detector (15);The output end of first optical detector (13)
It is connected with the input terminal of the first amplifying circuit (14), one of the output end of the first amplifying circuit (14) and add circuit (30) is defeated
Enter end to be connected, the output end of add circuit (30) is connected with the input terminal of piezoelectric ceramic actuator (31), piezoelectric ceramic actuator
(31) output end is connected with PZT piezoelectric ceramics (7);10% output end and the 6th photo-coupler of 5th photo-coupler (25)
(26) a input terminal is connected, and another input terminal and dehydrated alcohol of the 6th photo-coupler (26) fill photonic crystal fiber
(27) one end is connected, and dehydrated alcohol fill the other end of photonic crystal fiber (27) and the 6th photo-coupler (26) one is defeated
Outlet is connected, and another output end of the 6th photo-coupler (26) is connected with the input terminal of third optical detector (28), and third light is visited
The output end for surveying device (28) is connected with the input terminal of the second amplifying circuit (29), the output end and addition of the second amplifying circuit (29)
Another input terminal of circuit (30) is connected;The input terminal phase of the output end of second optical detector (15) and A/D converter (16)
Even, the output end of A/D converter (16) is connected with single-chip microcontroller (17), a serial ports of single-chip microcontroller (17) and the first level conversion
Chip (18) is connected, and the first electrical level transferring chip (18) is connected with the RS232 interface of adjustable optic fibre delay line (19), adjustable optic fibre
The output end of delay line (19) is connected with 50% output end of the second photo-coupler (8), the second photo-coupler (8) it is another
A 50% output end is connected with the input terminal of the second optoisolator (23), the output end and dispersion compensation of the second optoisolator (23)
One end of optical fiber (22) is connected, and the other end of dispersion compensating fiber (22) is connected with one end of black phosphorus saturable absorber (21);
The other end of black phosphorus saturable absorber (21) is connected with one end of single mode optical fiber (20), the other end of single mode optical fiber (20) with can
The input terminal of fibre delay line (19) is adjusted to be connected;Another serial ports of single-chip microcontroller (17) and second electrical level conversion chip (24) phase
Even, second electrical level conversion chip (24) is connected with the RS232 interface of adjustable optic fibre filter (4).
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CN105826804A (en) * | 2016-05-27 | 2016-08-03 | 清华大学 | Light frequency reference fiber femtosecond light frequency comb with tunable broadband repetition frequency |
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