CN107039880A - 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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- CN107039880A CN107039880A CN201710492357.XA CN201710492357A CN107039880A CN 107039880 A CN107039880 A CN 107039880A CN 201710492357 A CN201710492357 A CN 201710492357A CN 107039880 A CN107039880 A CN 107039880A
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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
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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
- H01S3/06725—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)
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Abstract
The passive mixed mode-locking optical fiber laser pulse generating system of master of the present invention belongs to the technical field of optic communication device, its primary structure includes the Active Mode-locked Fiber Laser resonator being made up 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 up 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 photo-detector receiving portion, and control adjustable optic fibre delay line to realize that whole system exports the optimization of pulse using singlechip feedbsck, it is final whole system is produced stable ultrashort high-speed optical pulse, it is simple to operate and can reach accurate control.
Description
Technical field
The invention belongs to the technical field of optic communication device, more particularly to a kind of main passive mixed mode-locking optical fiber laser arteries and veins
Rush generation system.
Background technology
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 preferable choosing of light-pulse generator in optical communication system
Select.
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 very big in Ultra-High Speed Optical Communication
Application prospect.
It is Active Mode-locked Fiber Laser system as shown in Figure 2 with immediate prior art of the invention, sinusoidal electricity
Signal function is pressed in lithium niobate (LiNbO3) modulator, modulator will produce periodic phase place change or loss, periodically
Change act on the pulse of resonance cavity circulation, influencing each other between them is so that produce locked mode sequence.LiNbO3Modulation
Device is Polarization-Sensitive, and a Polarization Controller is placed generally before modulator to adjust the light field polarization state of modulator.Center
Wavelength is adjusted by tunable optic filter.
But the spectrum of Active Mode-locked Fiber Laser output laser is narrow, Ultra-short pulse is hardly resulted in, and actively lock
The chamber length of mode fiber laser is general all longer, easily by external influence, causes its less stable.
Passive mode-locking fiber laser is simple in construction, cost is low and reliability is high, is real all-fiber devices, utilizes light
Fine nonlinear effect, can produce most short optical pulse, but the stability of its output pulse recurrence frequency is poor, it is impossible to extraneous
Regulation and control.
In summary, intrinsic shortcoming is individually present in existing actively or passively mode locked fiber laser system at present,
Effectively automatically controlled especially because not taken in existing mode locked fiber laser system so that the stability of output optical pulse
It is poor.
The content of the invention
The technical problem to be solved in the present invention be the shortcoming that overcomes mode locked fiber laser in background technology to exist there is provided
The main passive mixed mode-locking optical fiber laser pulse generating system of one kind, for the purpose of producing stable ultrahigh speed pulse.
Technical scheme is as follows：
The main passive mixed mode-locking optical fiber laser pulse generating system of one kind, its structure has, pump light source 1 and wavelength-division multiplex
The 980nm ends of device 2 are connected, and the 1550nm ends of wavelength division multiplexer 2 are connected with the input 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 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；The other end of the described optical fiber being wrapped on the first PZT piezoelectric ceramics 7 and one of the second photo-coupler 8
Input is connected；Another input of second photo-coupler 8 is connected with the input of the first optoisolator 9；First is optically isolated
The output end of device 9 is connected with one end of Er-doped fiber 10, the other end of Er-doped fiber 10 and the common port phase of wavelength division multiplexer 2
Even；
Characterized in that, structure also has the input of the 3rd photo-coupler 11 and 90% output end of the first photo-coupler 3
It is connected, 40% output end of the 3rd photo-coupler 11 is connected with the input of the 4th photo-coupler 12, the 3rd photo-coupler 11
60% output end as the passive mixed mode-locking pulse generating system of the master based on black phosphorus saturable absorber output end
Mouthful；One 50% output end of the 4th photo-coupler 12 is connected with the input of the first photo-detector 13, another 50% output
End is connected with the input of the second photo-detector 15；The output end of first photo-detector 13 and the input of piezoelectric ceramic actuator 14
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 photo-detector 15/
The input of number converter 16 is connected, and the output end of A/D converter 16 is connected with single-chip microcomputer 17, single-chip microcomputer 17 and level conversion
Chip 18 is connected, and electrical level transferring chip 18 is connected with the RS232 interfaces 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
The input 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 fiber 20, the other end of single-mode fiber 20 is connected with the input of adjustable optic fibre delay line 19.
Beneficial effect：
1st, the present invention produces the output of high speed ultrashort light pulse using main passive mixed mode-locking fiber ring laser system structure, can
To overcome the shortcoming of the uncontrollable output pulse recurrence frequency of passive mode-locking fiber laser system and repetition rate stability difference,
The advantage of femtosecond light pulse can be produced by playing passive mode-locking fiber laser system；Active mode-locked fiber can be overcome simultaneously
The shortcoming of Optical Maser System output stability difference, mode locked fiber laser system of taking the initiative output repetition rate is adjustable excellent
Gesture, makes whole system produce stable ultrashort high-speed optical pulse.
2nd, 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, makes system output stable；Adjustable optic fibre delay line is controlled using feedback signal simultaneously, Time-delayed Feedback is carried out, makes system
In light pulse more optimize, whole system is produced stable ultrashort high-speed optical pulse.
3rd, New Two Dimensional material black phosphorus is carried out passive mode-locking as saturable absorber and produces ultrashort high-speed light by the present invention
Pulse, the saturable absorber based on black phosphorus has ultrashort recovery time, and black phosphorus material has the band structure of direct band gap, inhaled
The advantages of wave-length coverage is big is received, femtosecond ultrashort pulse can be produced.
4th, the present invention is simple in construction, and laser is exported using photo-detector receiving portion, is controlled using singlechip feedbsck adjustable
Fibre delay line realizes that whole system exports the optimization of pulse, simple to operate and can reach accurate control.
Brief description of the drawings：
Fig. 1 is the passive mixed mode-locking optical fiber laser pulse generating system block diagram of master of the present invention.
Fig. 2 is traditional Active Mode-locked Fiber Laser system block diagram.
Embodiment
Below in conjunction with the accompanying drawings, the concrete structure of each several part light path of the present invention is illustrated.In embodiment, the bracket behind component
The preferred parameter of the invention of middle mark, but protection scope of the present invention do not limited by these parameters.
Embodiment 1：The concrete structure of the present invention
As shown in Figure 1, its structure has the passive mixed mode-locking optical fiber laser pulse generating system structure of master of the present invention,
Pump light source 1 (980nm lasers, peak power output is 1W) and wavelength division multiplexer 2 (980/1550nm wavelength division multiplexers)
980nm ends are connected, the 1550nm ends of wavelength division multiplexer 2 and the first photo-coupler 3 (1 × 2 standard single mode photo-coupler, splitting ratio
For 10：90) input is connected；10% output end of the first photo-coupler 3 and (the mechanical optical fiber of tricyclic of Polarization Controller 4
Polarization Controller) one end be connected, its export light pulse continued to run with Active Mode-locked Fiber Laser resonator, first
(1 × 2 standard single mode photo-coupler, splitting ratio is 40 to 90% output end of photo-coupler 3 with the 3rd photo-coupler 11：60) defeated
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 modulators of art Co., Ltd) input 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 described optical fiber being wrapped on the first PZT piezoelectric ceramics 7
(2 × 2 standard single mode photo-couplers, splitting ratio is 50 with the second photo-coupler 8：50) a input is connected；Second optocoupler
Another input of clutch 8 is connected with the input of the first optoisolator 9 (1550nm polarization independent optical isolators), the first light
Isolator 9 makes the light pulse unidirectional operation in system, and direction is the clockwise direction of accompanying 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 fibers of Nufern companies of U.S. production), Er-doped fiber 10
The other end is connected with the common port of wavelength division multiplexer 2.Said structure constitutes traditional Active Mode-locked Fiber Laser resonator.
The present invention is on the basis of traditional Active Mode-locked Fiber Laser resonator, also based on black phosphorus saturable absorption
The passive mode-locking fiber laser system of body and the pulse optimization system being made up of two automatic feedback control rings, structure is,
(1 × 2 standard single mode photo-coupler, splitting ratio is 50 to 40% output end of the 3rd photo-coupler 11 with the 4th photo-coupler 12：
50) input is connected, and 60% output end of the 3rd photo-coupler 11 is used as the master based on black phosphorus saturable absorber
The output port of passive mixed mode-locking pulse generating system, thus port is exported for the light pulse that system is produced；4th photo-coupler
12 50% output end and (the LSIPD-LD50 type optical detections of the quick Micron Technology Co., Ltd in Beijing of the first photo-detector 13
Device) input be connected, another 50% output end and the (LSIPD- of the quick Micron Technology Co., Ltd in Beijing of the second photo-detector 15
LD50 types photo-detector) input be connected；The output end of first photo-detector 13 and (this seminar of piezoelectric ceramic actuator 14
Homemade device, concrete structure is shown in patent ZL200710055865.8) input be connected, the output of piezoelectric ceramic actuator 14
End is connected with PZT piezoelectric ceramics 7 (cylindrical piezoelectric ceramics, external diameter 50mm, internal diameter 40mm, high 50mm), to control resonator
Length；The output end of second photo-detector 15 is connected with the input of A/D converter 16 (MAX197), A/D converter 16
Output end be connected with single-chip microcomputer 17 (STC89C51 single-chip microcomputers), single-chip microcomputer 17 receive digital quantity carry out calculating processing, single-chip microcomputer
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 types of Science and Technology Ltd.) RS232 control ends be connected, make adjustable optic fibre
Delay line 19 receives control signal, carries out Time-delayed Feedback, the light pulse that systems stabilisation is produced, 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 and the second light of the second photo-coupler 8
The input of isolator 23 (1550nm polarization independent optical isolators) is connected, and the second optoisolator 23 allows light pulse to pass through direction
It is the counter clockwise direction of accompanying drawing 1；The output end and dispersion compensating fiber 22 of second optoisolator 23 be (THORLABS companies of the U.S.
DCF38 types dispersion compensating fiber) one end be connected, the other end of dispersion compensating fiber 22 and (this of black phosphorus saturable absorber 21
Seminar makes by oneself, on the end face that multilayer black phosphorus is produced on to side fibre-optical splice, with the joints of optical fibre by this joint and opposite side
Fibre-optical splice be connected, the joints of optical fibre can using Shanghai Han Yu Fibre Optical Communication Technologies Co., Ltd produce standard FC/PC
The joints of optical fibre) one end be connected；The other end of black phosphorus saturable absorber 21 and single-mode fiber 20 (standard single-mode fiber)
One end is connected, and the other end of single-mode fiber 20 is connected with the input of adjustable optic fibre delay line 19.
The course of work of the present invention of embodiment 2 and the effect of each critical piece
In structure shown in accompanying drawing 1, pump light source 1 is as the laser pumping source of whole system, and pump light source 1 passes through wavelength-division
Multiplexer 2 enters in system；Splitting ratio is 10：The laser that intracavitary is run is divided into two parts, one by 90 the first photo-coupler 3
(90%) is divided to export to the 3rd photo-coupler 11, another part (10%) continues to transport in Active Mode-locked Fiber Laser resonator
OK；Splitting ratio is 40：The laser that first photo-coupler 3 is exported is divided into two parts by 60 the 3rd photo-coupler 11, a part
(60%) exported as the laser of whole system, another part (40%) is output to the 4th photo-coupler 12 as the feedback of system
Signal；The polarization state that Polarization Controller 4 is used in control system；First optoisolator 9 is used to ensure active mode-locked fiber laser
The unidirectional operation of light in device resonator；Er-doped fiber 10 produces gain effect in systems, it is ensured that operation laser in resonator
Energy is unattenuated；Splitting ratio is 50：50 the second photo-coupler 8 is connected to active mode locking and passive mode-locking two-part structure, makes
Passive mode-locking fiber laser system based on black phosphorus and the Active Mode-locked Fiber Laser system based on PZT are organically combined
Together, main passive mixed mode-locking is realized；Black phosphorus saturable absorber 21 is that black phosphorus material is fabricated into 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, export all the way to the first photo-detector 13, be visited by the first light
Survey device 13 and convert optical signals to electric signal, export to piezoelectric ceramic actuator 14, piezoelectric ceramic actuator 14 will be received
Signal amplifies for driving PZT piezoelectric ceramics 7, and then controls the length for the optical fiber being entangled on PZT piezoelectric ceramics 7 to active mode locking
Resonant cavity of fibre-optical laser enters the compensation of an actor's rendering of an operatic tune length, it is ensured that the reliability of system locked mode.
Another road of 4th photo-coupler 12 output is exported to the second photo-detector 15, and the second photo-detector 15 is converted
It is used for the delay of feedback of the passive mode-locking fiber laser system based on black phosphorus saturable absorber for electric current；A/D converter
16 receive the electric signal of the second photo-detector 15 output, and convert analog signals into data signal, and single-chip microcomputer 17 receives analog
The data signal that converter 16 is exported carries out calculating processing, and produces control signal, and electrical level transferring chip 18 is used to connect monolithic
The RS232 control ends 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 microcomputer 17,
Time delay feed back control is carried out, is optimized the light pulse that whole system is exported.
Claims (1)
1. the main passive mixed mode-locking optical fiber laser pulse generating system of one kind, its structure has, pump light source (1) and wavelength-division multiplex
The 980nm ends of device (2) are connected, and the 1550nm ends of wavelength division multiplexer (2) are connected with the input 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 of the lithium niobate modulator (5) of wave source (6) driving is connected；The output end of lithium niobate modulator (5) is with being wrapped in PZT pressures
One end of optical fiber on electroceramics (7) is connected；The other end and second of the described optical fiber being wrapped on PZT piezoelectric ceramics (7)
One input of photo-coupler (8) is connected；Another input of second photo-coupler (8) and the first optoisolator (9)
Input 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 port of wavelength division multiplexer (2)；
Characterized in that, structure also has the input of the 3rd photo-coupler (11) and 90% output end of the first photo-coupler (3)
It is connected, 40% output end of the 3rd photo-coupler (11) is connected with the input of the 4th photo-coupler (12), the 3rd photo-coupler
(11) 60% output end is used as the passive mixed mode-locking pulse generating system of the master based on black phosphorus saturable absorber
Output port；One 50% output end of the 4th photo-coupler (12) is connected with the input of the first photo-detector (13), another
Individual 50% output end is connected with the input of the second photo-detector (15)；The output end and piezoelectric ceramics of first photo-detector (13)
The input of driver (14) is connected, and the output end of piezoelectric ceramic actuator (14) is connected with PZT piezoelectric ceramics (7)；Second light
The output end of detector (15) is connected with the input of A/D converter (16), the output end and monolithic of A/D converter (16)
Machine (17) is connected, and single-chip microcomputer (17) is connected with electrical level transferring chip (18), electrical level transferring chip (18) and adjustable optic fibre delay line
(19) RS232 interfaces are connected, the output end of adjustable optic fibre delay line (19) and one 50% output of the second photo-coupler (8)
End is connected, and another 50% output end of the second photo-coupler (8) is connected with the input of the second optoisolator (23), the second light
The output end of isolator (23) is connected with one end of dispersion compensating fiber (22), the other end and black phosphorus of dispersion compensating fiber (22)
One end of saturable absorber (21) is connected；One end phase of the other end of black phosphorus saturable absorber (21) and single-mode fiber (20)
Even, the other end of single-mode fiber (20) is connected with the input of adjustable optic fibre delay line (19).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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