CN107039880B - Main passive mixed mode-locking optical fiber laser pulse generating system - Google Patents
Main passive mixed mode-locking optical fiber laser pulse generating system Download PDFInfo
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- CN107039880B CN107039880B CN201710492357.XA CN201710492357A CN107039880B CN 107039880 B CN107039880 B CN 107039880B CN 201710492357 A CN201710492357 A CN 201710492357A CN 107039880 B CN107039880 B CN 107039880B
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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
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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
-
- 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
- H01S3/06725—Fibre characterized by a specific dispersion, e.g. for pulse shaping in soliton lasers or for dispersion compensating [DCF]
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- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
The passive mixed mode-locking optical fiber laser pulse generating system of master of the invention belongs to the technical field of optic communication device, its 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), Polarization Controllers (4), 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 automatic feedback control rings are constituted.The present invention is using main passive mixed mode-locking technology, laser is exported using optical detector receiving portion, and the optimization of whole system output pulse is realized using singlechip feedbsck control adjustable optic fibre delay line, finally whole system is made to generate stable ultrashort high-speed optical pulse, it is easy to operate and can reach accurate control.
Description
Technical field
The invention belongs to the technical field of optic communication device, in particular to a kind of passive mixed mode-locking optical fiber laser arteries and veins of master
Rush generation system.
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 poor.
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
A kind of passive mixed mode-locking optical fiber laser pulse generating system of master, for the purpose of generating stable ultrahigh speed pulse.
Technical scheme is as follows:
A kind of passive mixed mode-locking optical fiber laser pulse generating system of master, structure have, pump light source 1 and wavelength-division multiplex
The end 980nm of device 2 is connected, and the end 1550nm of wavelength division multiplexer 2 is connected with the input terminal of the first photo-coupler 3；First optical coupling
10% output end of device 3 is connected with one end of Polarization Controller 4, the other end of Polarization Controller 4 and the niobium driven by microwave source 6
The input terminal of sour lithium modulator 5 is connected；The output end of lithium niobate modulator 5 and the optical fiber being wrapped on the first PZT piezoelectric ceramics 7
One end be connected；One of the other end of the optical fiber being wrapped on the first PZT piezoelectric ceramics 7 and the second photo-coupler 8
Input terminal is connected；Another input terminal of second photo-coupler 8 is connected with the input terminal of the first optoisolator 9；First optical isolation
The output end of device 9 is connected with one end of Er-doped fiber 10, the common end phase of the other end and wavelength division multiplexer 2 of Er-doped fiber 10
Even；
It is characterized in that, there are also 90% output ends of the input terminal of third photo-coupler 11 and the first photo-coupler 3 for structure
It is connected, 40% output end of third photo-coupler 11 is connected with the input terminal of the 4th photo-coupler 12, third photo-coupler 11
Output end of 60% output end as the passive mixed mode-locking pulse generating system of the master based on black phosphorus saturable absorber
Mouthful；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 input of the output end and piezoelectric ceramic actuator 14 of first optical detector 13
End is connected, and the output end of piezoelectric ceramic actuator 14 is connected with PZT piezoelectric ceramics 7；The output end and mould of second optical detector 15/
The input terminal of number converter 16 is connected, and the output end of A/D converter 16 is connected with single-chip microcontroller 17, single-chip microcontroller 17 and level conversion
Chip 18 is connected, and electrical level transferring chip 18 is connected with the RS232 interface of adjustable optic fibre delay line 19, adjustable optic fibre delay line 19
Output end is connected with 50% output end of the second photo-coupler 8, another 50% output end of the second photo-coupler 8 and
The input terminal of two optoisolators 23 is connected, and the output end of the second optoisolator 23 is connected with one end of dispersion compensating fiber 22, color
The other end for dissipating compensated optical fiber 22 is connected with one end of black phosphorus saturable absorber 21；The other end of black phosphorus saturable absorber 21
It is connected with one end of single mode optical fiber 20, the other end of single mode optical fiber 20 is connected with the input terminal of adjustable optic fibre delay line 19.
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 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.
Detailed description of the invention:
Fig. 1 is the passive mixed mode-locking optical fiber laser pulse generating system block diagram of master 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
Master of the invention is passive, and mixed mode-locking optical fiber laser pulse generating system structure is as shown in Fig. 1, and structure has,
Pump light source 1 (980nm laser, peak power output 1W) and wavelength division multiplexer 2 (980/1550nm wavelength division multiplexer)
The end 980nm 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
It is connected for the input terminal of 10:90)；10% output end and (the mechanical optical fiber of tricyclic of Polarization Controller 4 of first photo-coupler 3
Polarization Controller) one end be connected, output light pulse continued to run in Active Mode-locked Fiber Laser resonant cavity, first
90% output end of photo-coupler 3 is defeated with third photo-coupler 11 (1 × 2 standard single mode photo-coupler, splitting ratio 40:60's)
Enter end to be connected；The other end of Polarization Controller 4 and (the vast space fiber optic communication skill in Shanghai of lithium niobate modulator 5 driven by microwave source 6
The MX-LN-20 light intensity modulator of art Co., Ltd) input terminal be connected；The output end of lithium niobate modulator 5 and it is wrapped in the
One end of optical fiber on one PZT piezoelectric ceramics 7 is connected；The other end of the optical fiber being wrapped on the first PZT piezoelectric ceramics 7
It is connected with an input terminal of the second photo-coupler 8 (2 × 2 standard single mode photo-couplers, splitting ratio 50:50)；Second optocoupler
Another input terminal of clutch 8 is connected with the input terminal of the first optoisolator 9 (1550nm polarization independent optical isolator), the first light
Isolator 9 makes the light pulse unidirectional operation in system, and direction is the clockwise direction of attached drawing 1；The output end of first optoisolator 9
It is connected with one end of Er-doped fiber 10 (the SM-ESF-7/125 Er-doped fiber of Nufern company, U.S. production), Er-doped fiber 10
The other end is connected with the common end of wavelength division multiplexer 2.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 and the pulse optimization system being made of two automatic feedback control rings, structure be,
40% output end of third photo-coupler 11 and the 4th photo-coupler 12 (1 × 2 standard single mode photo-coupler, splitting ratio 50:
50) input terminal is connected, and 60% output end of third photo-coupler 11 is as the master based on black phosphorus saturable absorber
The output port of passive mixed mode-locking pulse generating system, thus port exports for the light pulse that system generates；4th photo-coupler
13 (the LSIPD-LD50 type optical detection of the quick Micron Technology Co., Ltd in Beijing of 12 50% output end and the first optical detector
Device) input terminal be connected, the 15 (LSIPD- of the quick Micron Technology Co., Ltd in Beijing of another 50% output end and the second optical detector
LD50 type optical detector) input terminal be connected；The output end of first optical detector 13 and 14 (this seminar of piezoelectric ceramic actuator
Homemade device, specific structure are shown in patent ZL200710055865.8) input terminal be connected, the output of piezoelectric ceramic actuator 14
End is connected with PZT piezoelectric ceramics 7 (cylindrical piezoelectric ceramics, outer diameter 50mm, internal diameter 40mm, high 50mm), to control resonant cavity
Length；The output end of second optical detector 15 is connected with the input terminal of A/D converter 16 (MAX197), A/D converter 16
Output end be connected with single-chip microcontroller 17 (STC89C51 single-chip microcontroller), single-chip microcontroller 17 receive digital quantity carry out calculation processing, single-chip microcontroller
17 are connected with electrical level transferring chip 18 (MAX232), electrical level transferring chip 18 and (the Sichuan space star aberration of adjustable optic fibre delay line 19
The electronic fibre delay line of VDL-40-15-S9-1-FA type of Science and Technology Ltd.) RS232 control terminal be connected, make adjustable optic fibre
Delay line 19 receives control signal, carries out Time-delayed Feedback, the light pulse that systems stabilisation generates, the output of adjustable optic fibre delay line 19
End is connected with 50% output end of the second photo-coupler 8, another 50% output end of the second photo-coupler 8 and the second light
The input terminal of isolator 23 (1550nm polarization independent optical isolator) is connected, and the second optoisolator 23 allows light pulse to pass through direction
It is the counter clockwise direction of attached drawing 1；The output end and dispersion compensating fiber 22 of second optoisolator 23 be (THORLABS company, the U.S.
DCF38 type dispersion compensating fiber) one end be connected, the other end of dispersion compensating fiber 22 and (this of black phosphorus saturable absorber 21
Seminar's self-control, multilayer black phosphorus is produced on the end face of side fibre-optical splice, with optical fiber connector by this connector and the other side
Fibre-optical splice be connected, optical fiber connector can be used Shanghai Han Yu Fibre Optical Communication Technology Co., Ltd production standard FC/PC
Optical fiber connector) one end be connected；The other end of black phosphorus saturable absorber 21 and single mode optical fiber 20 (standard single-mode fiber)
One end is connected, and the other end of single mode optical fiber 20 is connected with the input terminal of adjustable optic fibre delay line 19.
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 wavelength-division
Multiplexer 2 enters in system；The laser of intracavitary operation is divided into two parts by the first photo-coupler 3 that splitting ratio is 10:90, and one
Divide (90%) output to third photo-coupler 11, another part (10%) continuation is transported in Active Mode-locked Fiber Laser resonant cavity
Row；Splitting ratio is that the laser that the first photo-coupler 3 exports is divided into two parts by the third photo-coupler 11 of 40:60, a part
(60%) it is exported as the laser of whole system, another part (40%) is output to feedback of the 4th photo-coupler 12 as system
Signal；Polarization Controller 4 is for the polarization state in control system；First optoisolator 9 is for guaranteeing active mode-locked fiber laser
The unidirectional operation of light in device resonant cavity；Er-doped fiber 10 generates gain effect in systems, guarantees operation laser in resonant cavity
Energy is unattenuated；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
Passive mode-locking fiber laser system based on black phosphorus and the Active Mode-locked Fiber Laser system based on PZT organically combine
Together, main passive mixed mode-locking is realized；Black phosphorus saturable absorber 21 is that black phosphorus material is fabricated to saturable absorber, is used for
The generation of mode-locked ultrashort pulse.
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, to piezoelectric ceramic actuator 14, piezoelectric ceramic actuator 14 will be received for output
Signal amplification controls the length for the optical fiber being entangled on PZT piezoelectric ceramics 7 to active mode locking for driving PZT piezoelectric ceramics 7
Resonant cavity of fibre-optical laser 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 electrical level transferring chip 18 is for connecting monolithic
The RS232 control terminal of machine 17 and adjustable optic fibre delay line 19；Adjustable optic fibre delay line 19 is set to receive the control signal of single-chip microcontroller 17,
Time delay feed back control is carried out, the light pulse for exporting whole system is optimized.
Claims (1)
1. a kind of passive mixed mode-locking optical fiber laser pulse generating system of master, structure have, pump light source (1) and wavelength-division multiplex
The end 980nm of device (2) is connected, and the end 1550nm of wavelength division multiplexer (2) is connected with the input terminal of the first photo-coupler (3)；First
10% output end of photo-coupler (3) is connected with one end of Polarization Controller (4), the other end of Polarization Controller (4) with by micro-
The input terminal of the lithium niobate modulator (5) of wave source (6) driving is connected；The output end of lithium niobate modulator (5) is pressed with PZT is wrapped in
One end of optical fiber on electroceramics (7) is connected；The other end and second of the optical fiber being wrapped on PZT piezoelectric ceramics (7)
One input terminal of photo-coupler (8) is connected；Another input terminal of second photo-coupler (8) and the first optoisolator (9)
Input terminal is connected；The output end of first optoisolator (9) is connected with one end of Er-doped fiber (10), Er-doped fiber (10) it is another
End is connected with the common end of wavelength division multiplexer (2)；
It is characterized in that, there are also 90% output ends of the input terminal of third photo-coupler (11) and the first photo-coupler (3) for structure
It is connected, 40% output end of third photo-coupler (11) is connected with the input terminal of the 4th photo-coupler (12), third photo-coupler
(11) output port of 60% output end as the passive mixed mode-locking optical fiber laser pulse generating system of master；4th
One 50% output end of photo-coupler (12) is connected with the input terminal of the first optical detector (13), another 50% output end with
The input terminal of second optical detector (15) is connected；The output end of first optical detector (13) is defeated with piezoelectric ceramic actuator (14)
Enter end to be connected, the output end of piezoelectric ceramic actuator (14) is connected with PZT piezoelectric ceramics (7)；Second optical detector (15) it is defeated
Outlet is connected with the input terminal of A/D converter (16), and the output end of A/D converter (16) is connected with single-chip microcontroller (17), single
Piece machine (17) is connected with electrical level transferring chip (18), and electrical level transferring chip (18) and the RS232 of adjustable optic fibre delay line (19) connect
Mouth is connected, and the output end of adjustable optic fibre delay line (19) is connected with 50% output end of the second photo-coupler (8), the second light
Another 50% output end of coupler (8) is connected with the input terminal of the second optoisolator (23), the second optoisolator (23)
Output end is connected with the one end of dispersion compensating fiber (22), the other end and black phosphorus saturable absorber of dispersion compensating fiber (22)
(21) one end is connected；The other end of black phosphorus saturable absorber (21) is connected with one end of single mode optical fiber (20), single mode optical fiber
(20) the other end is connected with the input terminal of adjustable optic fibre delay line (19).
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| CN201710492357.XA CN107039880B (en) | 2017-06-26 | 2017-06-26 | Main passive mixed mode-locking optical fiber laser pulse generating system |
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| CN201710492357.XA CN107039880B (en) | 2017-06-26 | 2017-06-26 | Main passive mixed mode-locking optical fiber laser pulse generating system |
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| CN107039880B true CN107039880B (en) | 2019-06-18 |
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| CN107591676A (en) * | 2017-09-30 | 2018-01-16 | 天津理工大学 | A kind of passive mode-locking fiber laser |
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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 |
| CN106356706A (en) * | 2016-11-18 | 2017-01-25 | 重庆邮电大学 | Intermediate infrared super-continuum spectrum fiber laser based on hybrid mode-locking technique |
| CN106848823A (en) * | 2017-03-06 | 2017-06-13 | 南京邮电大学 | A kind of 8 word chamber locked mode post vector optical fiber lasers based on model selection coupler |
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