CN109149332A - A kind of single-frequency laser of random waveform output - Google Patents
A kind of single-frequency laser of random waveform output Download PDFInfo
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- CN109149332A CN109149332A CN201811119831.5A CN201811119831A CN109149332A CN 109149332 A CN109149332 A CN 109149332A CN 201811119831 A CN201811119831 A CN 201811119831A CN 109149332 A CN109149332 A CN 109149332A
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- Prior art keywords
- laser
- frequency
- optical fiber
- random waveform
- pulse
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
- H01S3/06—Construction or shape of active medium
- H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
- H01S3/067—Fibre lasers
-
- 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
- H01S3/06791—Fibre ring 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
- H01S3/08—Construction or shape of optical resonators or components thereof
- H01S3/08018—Mode suppression
- H01S3/08022—Longitudinal modes
- H01S3/08031—Single-mode emission
-
- 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
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/094065—Single-mode pumping
-
- 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
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/091—Processes or apparatus for excitation, e.g. pumping using optical pumping
- H01S3/094—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light
- H01S3/0941—Processes or apparatus for excitation, e.g. pumping using optical pumping by coherent light of a laser diode
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Optical Communication System (AREA)
- Lasers (AREA)
Abstract
The invention discloses a kind of single-frequency lasers of random waveform output, including single-frequency continuous wave laser, optical fiber circulator, signal generator, driving circuit and semiconductor laser etc., driving circuit is triggered using the periodic signal that signal generator generates random waveform, and then make the output of semiconductor laser generation Pulse of Arbitrary shape, semiconductor pulse laser is as modulator, single-frequency laser is as main laser, pulse locking, the final pulse output for obtaining single longitudinal mode random waveform are carried out to single-frequency laser using injection seeded technology.The advantages that output laser pulse reconfigurable of the present invention, structure be simple, CFS center frequency stabilization, narrow linewidth, is applied to the fields such as radar detection.
Description
Technical field
The invention belongs to laser technology and its non-linear optical field more particularly to a kind of injection seeded technology random waveforms
The single longitudinal mode laser of output.
Background technique
Laser radar is the radar system to emit the characteristic quantities such as the position of detecting laser beam target, speed, is had high
Resolving power and anti-interference ability, be widely used in cruise missile guidance and navigation, laser ranging, low flying target with
Track, the measurement of target flight posture, spaceship navigation, atmospheric remote sensing and measurement and mapping etc. be numerous military and civilian neck
Domain.
By the difference of working method, mutual interference degree is aggravated between radar sensor, causes system erroneous judgement, and false alarm rate increases
Greatly.
Single frequency optical fiber laser, because of its narrow linewidth, low noise and the thus long feature of the coherence length that has, in laser
The fields such as radar, coherent light communication, high-resolution spectra analysis and gravitational wave detection are with a wide range of applications, random waveform energy
The ability for enough effectively reducing interference detection improves the safety of anti-collision radar system, can achieve the purpose that counterreconnaissance.It compares
It is relatively easy in mode locking and Q-regulating technique gain switch technical principle, especially gain-switching semiconductor laser；It is with structure
Simply, the advantages such as setting is flexible, and performance is stablized, and repetition is continuously adjustable, improve laser well in conjunction with injection locking technique
Output performance has vast potential for future development.
Summary of the invention
It is complicated in order to solve traditional pulse laser structure, it is expensive, it is easy to damage the problems such as.The present invention is infused using seed
Enter the pulse output that technology realizes nanosecond either picosecond, is realized using signal generator triggering semiconductor drive circuit any
Pulse shape；And then it can be realized the adjustable random waveform pulse output of wide short-term, short pulse, repetition rate.
To achieve the goals above, present invention employs following technical solutions.
A kind of single-frequency laser of random waveform output, comprising: single-frequency continuous wave laser, optical fiber circulator, signal occur
Device, driving circuit and semiconductor laser.
Signal generator connects driving circuit and provides Pulse of Arbitrary triggering, and driving circuit connects semiconductor laser and provides electricity
Driving, semiconductor laser connect the port b of optical fiber circulator, and single-frequency continuous wave laser connects the port a of optical fiber circulator, most
It is exported afterwards from the port c of optical fiber circulator.
The optical fiber circulator is separately connected single longitudinal mode laser and semiconductor laser, signal generator triggering driving electricity
Road and then excitation semiconductor laser make it generate the random waveform pulse output of nanosecond or picosecond, export the shape of pulse
It is configured by the trigger signal of adjustment signal generator.Single-frequency continuous wave laser output single-frequency continuous laser passes through fiber optic loop
Shape device is injected into semiconductor laser, and the single-frequency laser is modulated in the random waveform pulse output of semiconductor laser
At single longitudinal mode pulse laser identical with semiconductor laser repetition rate, pulse width and shape, and line width and single-frequency swash
Optical linewidth is identical, finally, modulated single longitudinal mode random waveform pulse laser is exported using optical fiber circulator output port.
Preferably, single-frequency laser is that single-frequency jointed fiber laser, single-frequency continuous semiconductor laser or single-frequency are continuous
Solid state laser is one such.
Preferably, single longitudinal mode continuous wave laser uses a kind of linear cavity configuration, pump light passes through wavelength division multiplexer (WDM)
Deexcitation Er-doped fiber and in intracavitary formation laser generation, isolator control laser in intracavitary one-way transmission.It is anti-by first
Emitting fiber bragg grating, doped fiber and the second reflection-type optical fiber Bragg grating constitute resonant cavity.
The pumping source of single-frequency continuous wave laser is semiconductor laser, solid state laser or optical fiber laser.
The semiconductor pulse laser uses superradiance (SLD) semiconductor pulse laser, distributed Blatt reflective
(DBR) impulse semiconductor laser or distributed Feedback (DFB) impulse semiconductor laser are one such.
The gain fibre is Er-doped fiber or er-doped photonic crystal fiber.
The first reflection-type optical fiber Bragg grating, the second reflection-type optical fiber Bragg grating reflection rate are R, wherein
0<R<1。
The isolator, wavelength division multiplexer, doped fiber, the first reflection-type optical fiber Bragg grating, the second reflection-type
Fiber bragg grating is polarization-maintaining type.
A kind of single-frequency laser of random waveform output of the present invention has the advantage that
1, single-frequency continuous wave laser exports single-frequency laser and is injected into semiconductor pulse laser by optical fiber circulator
In, the random waveform pulse of semiconductor laser output by the single-frequency laser be modulated into semiconductor laser pulse width and
The identical single longitudinal mode pulse laser of shape, and line width is identical with single-frequency continuous laser line width.Simultaneously as semiconductor laser
In resonant cavity and pump mode there is amplification, therefore the output of high-power single longitudinal mode Pulse of Arbitrary laser may be implemented.
2, short-pulse laser output, which is used as radar detection, has detection range remoter, and signal-to-noise ratio is bigger, and laser radar connects
Receive the advantages that sensitivity is higher, and resolution ratio is higher；Random waveform can effectively reduce the ability of interference detection, can reduce signal
Between annoyance level, phase noise is low, and the development cycle is short, improves the safety of anti-collision radar system, can reach the mesh of counterreconnaissance
's.
3, present invention design is simple, compact-sized, small in size, is easy to industrialization production application.
Detailed description of the invention
Fig. 1 is a kind of single-frequency laser of random waveform output.
Fig. 2 is a kind of single-frequency laser for random waveform output that single-frequency continuous wave laser is linear cavity.
In figure: 1, pumping source, 2, wavelength division multiplexer, 3, Er-doped fiber, the 4, first isolator, the 5, first reflection-type optical fiber cloth
Glug grating, the 6, second reflection-type optical fiber Bragg grating, 7, optical fiber circulator, the 8, second isolator, 9, signal generator,
10, drive circuit board, 11, semiconductor laser.
Specific embodiment
Below in conjunction with drawings and examples, the present invention is described in detail.
A kind of single-frequency laser of random waveform output, comprising: single-frequency laser, optical fiber circulator, signal generator, drive
Dynamic circuit, semiconductor laser；The optical fiber circulator is separately connected single longitudinal mode laser and semiconductor laser, and signal occurs
Device triggering driving circuit and then excitation semiconductor laser make it generate the random waveform pulse output of nanosecond or picosecond, defeated
The shape of pulse is configured by the trigger signal of adjustment signal generator out.It is logical that single-frequency laser exports continuous single-frequency laser
It crosses optical fiber circulator to be injected into semiconductor pulse laser, the random waveform pulse output of semiconductor laser will be described
Single-frequency laser is modulated into single longitudinal mode pulse laser identical with semiconductor laser repetition rate, pulse width and shape, and
Line width is identical with single-frequency continuous laser line width, finally, modulated single longitudinal mode random waveform pulse laser is using fiber annular
The output of device output port.
Preferably, single-frequency laser is that single-frequency jointed fiber laser, single-frequency continuous semiconductor laser, single-frequency are continuously solid
Body laser is one such.
Preferably, single longitudinal mode continuous wave laser uses a kind of linear cavity configuration, pump light passes through wavelength division multiplexer (WDM)
Deexcitation Er-doped fiber and in intracavitary formation laser generation, isolator control laser in intracavitary one-way transmission, anti-by first
Emitting fiber bragg grating, doped fiber and the second reflection-type optical fiber Bragg grating constitute resonant cavity.
The pumping source is semiconductor laser, solid state laser, optical fiber laser.
The semiconductor pulse laser uses superradiance (SLD) semiconductor pulse laser, distributed Blatt reflective
(DBR) impulse semiconductor laser, distributed Feedback (DFB) impulse semiconductor laser are one such.
The gain fibre is Er-doped fiber or er-doped photonic crystal fiber.
The first reflection-type optical fiber Bragg grating, the second reflection-type optical fiber Bragg grating reflection rate are R, wherein
0<R<1。
Described isolator, wavelength division multiplexer, doped fiber, beam splitter, fiber bragg grating, coupler etc. are polarization-maintaining
Type.
Embodiment 1
Selecting central wavelength such as Fig. 2 pumping source 1 is the semiconductor laser diode of 976nm；Wave division multiplex coupler 2 is selected
(2+1) × 1 pump signal polarization-maintaining coupler, such as 6/125 model；The high property of 3 optional U.S. Nufern company of gain fibre production
It can polarization-maintaining Er-doped fiber；First reflection-type optical fiber Bragg grating 5 is the fiber bragg grating of antiradar reflectivity, the second reflection-type
Fiber bragg grating 6 is the fiber bragg grating of high reflectance, and central wavelength is 1550nm, reflectivity R, wherein 0 <
R<1；Optoisolator selects polarization independent optical isolator；The choosing of optical fiber circulator 7 polarizes unrelated optical fiber circulator；Signal generator 9 selects
With random waveform signal can be emitted；The support picosecond of drive circuit board 10 or nanosecond random waveform output of pulse signal；Semiconductor
Laser 8 selects the superradiance semiconductor pulse laser or 1550nm distributed Feedback that output laser center wavelength is 1550nm
(DFB) laser.
Pumping source 1 connects the pumping output end of wave division multiplex coupler 2, the common end connection the of wave division multiplex coupler 2
One reflection-type optical fiber Bragg grating 5；The other end of first reflection-type optical fiber Bragg grating 6 connects gain fibre 3；Gain light
The other end of fibre 3 connects the second reflection-type optical fiber Bragg grating 13；The end of second reflection-type optical fiber Bragg grating 13 with
8 ° of angle cuttings；The signal end of wave division multiplex coupler 2 is connected with the input terminal of optoisolator 4, this structure is Bragg reflection
(DBR) optical fiber laser.The output end of ray laser beam splitter 6 is connected with the port a of optical fiber circulator 7；Optical fiber circulator 7
The port b is connected with semiconductor laser 11；Signal generator 9 connects 10 signal input part of drive circuit board, semiconductor laser
11 are fixed on the output end of Laser Driven plate 10；The input terminal of the second optoisolator 8 of the port c connection of optical fiber circulator 7, second
The single longitudinal mode Pulse of Arbitrary laser that central wavelength is 1550nm can be obtained as laser output in the output end of optoisolator 8
Output.
Claims (9)
1. a kind of single-frequency laser of random waveform output, it is characterised in that: including single-frequency continuous wave laser, optical fiber circulator,
Signal generator, driving circuit and semiconductor laser；
Signal generator connects driving circuit and provides Pulse of Arbitrary triggering, and driving circuit connects semiconductor laser offer electricity and drives
Dynamic, semiconductor laser connects the port b of optical fiber circulator, and single-frequency continuous wave laser connects the port a of optical fiber circulator, finally
It is exported from the port c of optical fiber circulator.
2. a kind of single-frequency laser of random waveform output according to claim 1, it is characterised in that: the fiber annular
Device is separately connected single longitudinal mode laser and semiconductor laser, and signal generator triggering driving circuit motivates semiconductor laser in turn
Device makes it generate the random waveform pulse output of nanosecond or picosecond, and the shape for exporting pulse passes through adjustment signal generator
Trigger signal is configured；Single-frequency continuous wave laser exports single-frequency continuous laser and is injected into semiconductor by optical fiber circulator
In laser, the single-frequency laser is modulated by the random waveform pulse output of semiconductor laser to be repeated with semiconductor laser
Frequency, pulse width and the identical single longitudinal mode pulse laser of shape, and line width is identical with single-frequency laser line width, finally, modulation
Single longitudinal mode random waveform pulse laser afterwards is exported using optical fiber circulator output port.
3. a kind of single-frequency laser of random waveform output according to claim 2, it is characterised in that: single-frequency laser is
Single-frequency jointed fiber laser, single-frequency continuous semiconductor laser or single-frequency continuous solid body laser are one such.
4. a kind of single-frequency laser of random waveform output according to claim 2, it is characterised in that: single longitudinal mode continuously swashs
Light device uses a kind of linear cavity configuration, and pump light shakes by wavelength division multiplexer deexcitation Er-doped fiber and in intracavitary formation laser
It swings, isolator controls laser in intracavitary one-way transmission；It is anti-by the first reflection-type optical fiber Bragg grating, doped fiber and second
Emitting fiber bragg grating constitutes resonant cavity.
5. a kind of single-frequency laser of random waveform output according to claim 2, it is characterised in that: single-frequency continuous laser
The pumping source of device is semiconductor laser, solid state laser or optical fiber laser.
6. a kind of single-frequency laser of random waveform output according to claim 2, it is characterised in that: the semiconductor arteries and veins
Laser is rushed using superradiance semiconductor pulse laser, distributed Blatt reflective impulse semiconductor laser or distributed Feedback
Impulse semiconductor laser is one such.
7. a kind of single-frequency laser of random waveform output according to claim 2, it is characterised in that: the gain fibre
It is Er-doped fiber or er-doped photonic crystal fiber.
8. a kind of single-frequency laser of random waveform output according to claim 2, it is characterised in that: described first is anti-
Emitting fiber bragg grating, the second reflection-type optical fiber Bragg grating reflection rate are R, wherein 0 < R < 1.
9. a kind of single-frequency laser of random waveform output according to claim 2, it is characterised in that: the isolation
Device, wavelength division multiplexer, doped fiber, the first reflection-type optical fiber Bragg grating, the second reflection-type optical fiber Bragg grating are to protect
Bias tyre.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811119831.5A CN109149332A (en) | 2018-09-25 | 2018-09-25 | A kind of single-frequency laser of random waveform output |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811119831.5A CN109149332A (en) | 2018-09-25 | 2018-09-25 | A kind of single-frequency laser of random waveform output |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109687276A (en) * | 2019-01-20 | 2019-04-26 | 北京工业大学 | The gain switch laser of thulium-doped fiber laser pumping |
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| US20110122912A1 (en) * | 2009-11-20 | 2011-05-26 | Benjamin Seldon D | Optical transmitters for mm-wave rof systems |
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| CN106936064A (en) * | 2017-05-21 | 2017-07-07 | 北京工业大学 | A kind of single longitudinal mode pulse laser based on continuous light injection seeded |
-
2018
- 2018-09-25 CN CN201811119831.5A patent/CN109149332A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110122912A1 (en) * | 2009-11-20 | 2011-05-26 | Benjamin Seldon D | Optical transmitters for mm-wave rof systems |
| US20140314108A1 (en) * | 2011-09-12 | 2014-10-23 | Dublin City University | Wavelength tunable comb source |
| CN106936064A (en) * | 2017-05-21 | 2017-07-07 | 北京工业大学 | A kind of single longitudinal mode pulse laser based on continuous light injection seeded |
Non-Patent Citations (2)
| Title |
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| CHUNG-YU LIN等: "Master-to-slave injection-locked WRC-FPLD for multi-QAM-OFDM transmission", 《IEEE》 * |
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| CN109687276A (en) * | 2019-01-20 | 2019-04-26 | 北京工业大学 | The gain switch laser of thulium-doped fiber laser pumping |
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