CN106058621A - Adjustable picosecond laser - Google Patents
Adjustable picosecond laser Download PDFInfo
- Publication number
- CN106058621A CN106058621A CN201610447494.7A CN201610447494A CN106058621A CN 106058621 A CN106058621 A CN 106058621A CN 201610447494 A CN201610447494 A CN 201610447494A CN 106058621 A CN106058621 A CN 106058621A
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- CN
- China
- Prior art keywords
- adjustable
- laser
- optical fiber
- fiber
- photoswitch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
- H01S3/10007—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
- H01S3/10023—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers by functional association of additional optical elements, e.g. filters, gratings, reflectors
- H01S3/1003—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers by functional association of additional optical elements, e.g. filters, gratings, reflectors tunable optical elements, e.g. acousto-optic filters, tunable gratings
-
- 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
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Lasers (AREA)
Abstract
The invention relates to an adjustable picosecond laser. The adjustable picosecond laser is formed through the connection of all-polarization maintaining optical fiber devices; one end of the picosecond laser is a saturable absorption device, and then a gain optical fiber, a wavelength division multiplexer, a beam splitter, an optical switch, a plurality of delay optical fibers and optical fiber gratings correspondingly connected with the delay optical fibers one by one are orderly connected behind the saturable adsorption device; the other input port of the wavelength division multiplexer is connected with a pumping source, the other two ports of the beam splitter are respectively used as an oscillator output end and a monitoring end. An optical fiber link designed with the all polarization maintaining structure can resist the environment interference, and guarantee the long-term stabilization of the output pulse; a plurality of pulse widths, working wavelengths and repetition frequency required by the application can be previously set; by use of the optical switch, the adjustable picoseconds laser can be flexibly switched in multiple laser output parameters, so that application requirements can be met; and compared with the semiconductor picosecond laser in electric pulse modulation, the average power output by the adjustable picosecond laser is high, and adjustable picoseconds laser is more suitable to be a seed source for subsequent laser amplification.
Description
Technical field
The present invention relates to a kind of laser technology, particularly to one, repetition rate is variable, pulse width is variable, output wavelength
Variable adjustable picosecond laser.
Background technology
Picosecond laser can carry out high accuracy and process industrial materials such as metal, metal carbides, silicon chip, sapphire, potteries,
The laser pulse width of particularly about 5ps-100ps more advantage.More than MOPA nanosecond pulse and electrical modulation hundred psec
Pulsion phase ratio, 5ps-100ps pulse has narrower pulse width, can produce higher laser peak power.The more important thing is,
The time width of picopulse short, can effectively reduce the heat effect that laser emission brings, and reach material melts critical point
Required peak energy denisty.
At present, the picopulse of adjustable pulse width is electrical modulation semiconductor laser.The output pulse width of this kind of laser instrument
Degree is controlled by the pulsewidth of electrical modulation pulse signal.In order to obtain the optical signal of picopulse, electrical modulation pulse signal dutycycle pole
Low, therefore, the output mean power of semiconductor laser is the lowest.The too low output of agitator makes subsequent optical amplification process
Producing the spontaneous radiation being difficult to suppress, pulse signal to noise ratio is degenerated.
Summary of the invention
The present invention be directed to the problem that picosecond laser exists, it is proposed that a kind of adjustable picosecond laser, designed system
Output wavelength is variable, pulse width is variable, repetition rate is variable, adapts to application needs.
The technical scheme is that a kind of adjustable picosecond laser, full polarization fiber device connect and compose, one end is
Saturable absorption device, be connected with in turn afterwards gain fibre, wavelength division multiplexer, beam splitter, photoswitch, several postpone optical fiber and
The corresponding fiber grating being connected one by one with delay optical fiber；Another input port of wavelength division multiplexer connects pumping source, beam splitter
Another two port respectively as oscillator output end and monitoring side；The output wavelength of adjustable picosecond laser is chosen by photoswitch
The reflection wavelength of parameter and fiber grating determine；The parameter that pulse width is chosen by photoswitch and the reflection bandwidth of fiber grating
Determine；The parameter that repetition rate is chosen by photoswitch determines with optical fiber link length, needed for the length of delay optical fiber is used for mating
Repetition rate.
Described fiber grating provides the feedback signal of resonance for adjustable picosecond laser, is chosen the light of work by photoswitch
Fine grating, it is achieved switching output between multiple wavelength.
Described saturable absorption device is the optical fiber coupling device containing saturable absorption device.Described saturable absorber
The material of part is the optical material of non-linear saturated absorption effect.
Described gain fibre is the Active Optical Fiber of doped rare earth element, and absorptive pumping light also produces laser.
Described photoswitch is mechanical optical switch or electro-optic crystal and drives the electrooptical switching of power supply composition or brilliant by acousto-optic
Body and the acoustooptic switch of driving power supply composition.
The beneficial effects of the present invention is: the present invention is adjustable picosecond laser, the optical fiber link of the design inclined structure of all risk insurance can
To resist environmental disturbances, it is ensured that output pulse is steady in a long-term；The multiple pulse width needed for application, operating wave can be preset
Long, repetition rate；By photoswitch, can switch flexibly in multiple laser output parameters, meet application demand；Compared to electricity arteries and veins
The quasiconductor picosecond laser of modulated, the mean power of picosecond laser output that this is adjustable is higher, is more suitable for post laser
The seed source amplified.
Accompanying drawing explanation
Fig. 1 is the present invention adjustable picosecond laser structural representation.
Detailed description of the invention
The most adjustable picosecond laser structural representation, this is adjustable, and picosecond laser is depended on by full polarization fiber device
Secondary connect and compose, use saturable absorber to realize passive mode-locking.One end of this laser instrument is saturable absorption device, depends on afterwards
Secondary connection have gain fibre, wavelength division multiplexer, beam splitter, photoswitch, several postpone optical fiber and correspondence with postpone optical fiber one by one
The fiber grating connected.Another input port of wavelength division multiplexer connects pumping source.Two other port of beam splitter is respectively
As outfan and monitoring side.
The reflection of the fiber grating of the parameter that the output wavelength of adjustable picosecond laser is chosen by photoswitch and laser generation
Wavelength determines.The parameter that pulse width is chosen by photoswitch determines with the reflection bandwidth of the fiber grating of laser generation.Repeat frequency
The parameter that rate is chosen by photoswitch determines with the optical fiber link length of laser generation, and wherein, the length postponing optical fiber is used for mating
Required repetition rate.
Saturable absorption device is the optical fiber coupling device containing saturable absorption device；Wherein, saturable absorption device
Can be that transmission-type or reflective semiconductor saturable body, Graphene, CNT etc. can play non-linear saturated absorption effect
Optical material.
Gain fibre is the Active Optical Fiber of doped rare earth element, and absorptive pumping light also produces laser.
Wavelength division multiplexer enters the gain fibre of laser instrument for the coupling pump light launched by pumping source.
Beam splitter is for output two bundle laser.Wherein, a branch of exported by outfan, for reality application；Another bundle is by supervising
Survey end exports, for the duty of monitoring laser.
Photoswitch is for choosing the optical fiber link of follow-up work.Photoswitch can be mechanical optical switch or electro-optic crystal and drive
The electrooptical switching of galvanic electricity source composition or by acousto-optic crsytal and drive acoustooptic switch that power supply forms, maybe can play switching subsequent optical
Other kind photoswitches on road.
Fiber grating provides the feedback signal of resonance for laser instrument.The reflection wavelength of fiber grating determines the work of laser instrument
Make wavelength.Such as, the reflection wavelength of fiber grating 1 is 1030nm, and the reflection wavelength of fiber grating 1 is 1040nm, fiber grating 1
Reflection wavelength be 1050nm.I.e. chosen the fiber grating of work by photoswitch, can realize laser instrument 1030nm,
1040nm, 1050nm tri-is even more than switching output between wavelength.
Fiber grating provides the feedback signal of resonance for laser instrument.Time-bandwidth product characteristic according to picopulse, i.e. arteries and veins
Rushing width and the inversely proportional relation of spectral width, therefore, the reflection bandwidth of fiber grating determines the output pulse width of laser instrument.
Such as, operation wavelength is 1064nm fiber grating, and the spectral bandwidth of fiber grating 1 is 0.01nm(correspondence 165ps pulse width),
The spectral bandwidth 0.1nm(correspondence 16.5ps pulse width of fiber grating 2), the spectral bandwidth 1nm(of fiber grating 3 is corresponding
1.65ps pulse width).I.e. chosen the fiber grating of work by photoswitch, can realize laser instrument 165ps, 16.5ps,
1.65ps tri-is even more than switching output between pulse width.
Postpone optical fiber for mating the repetition rate needed for laser instrument.According to the repetition rate needed for laser instrument, calculate
Go out the optical fiber link length of laser instrument, remove each optical fiber coupling device and tail optical fiber, gain fibre, be the length postponing optical fiber
Degree.
Claims (6)
1. an adjustable picosecond laser, it is characterised in that connected and composed by full polarization fiber device, one end is saturable absorption
Device, be connected with in turn afterwards gain fibre, wavelength division multiplexer, beam splitter, photoswitch, several postpone optical fiber and correspondence with prolong
The fiber grating that optical fiber connects one by one late；Another input port of wavelength division multiplexer connects pumping source, the another two end of beam splitter
Mouth is respectively as oscillator output end and monitoring side；Parameter that the output wavelength of adjustable picosecond laser is chosen by photoswitch and light
The reflection wavelength of fine grating determines；The parameter that pulse width is chosen by photoswitch determines with the reflection bandwidth of fiber grating；Repeat
The parameter that frequency is chosen by photoswitch determines with optical fiber link length, postpones the length of optical fiber for mating required repetition frequency
Rate.
The most adjustable psec fiber laser system, it is characterised in that described fiber grating is adjustable psec
Laser instrument provides the feedback signal of resonance, is chosen the fiber grating of work by photoswitch, it is achieved switch defeated between multiple wavelength
Go out.
The most adjustable psec fiber laser system, it is characterised in that described saturable absorption device is for containing
There is the optical fiber coupling device of saturable absorption device.
The most adjustable psec fiber laser system, it is characterised in that the material of described saturable absorption device
Material is the optical material of non-linear saturated absorption effect.
The most adjustable psec fiber laser system, it is characterised in that described gain fibre is for mixing rare earth unit
The Active Optical Fiber of element, absorptive pumping light also produces laser.
The most adjustable psec fiber laser system, it is characterised in that described photoswitch is opened for machinery light
Close or electro-optic crystal and drive the electrooptical switching of power supply composition or by acousto-optic crsytal and drive the acoustooptic switch that forms of power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610447494.7A CN106058621A (en) | 2016-06-21 | 2016-06-21 | Adjustable picosecond laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610447494.7A CN106058621A (en) | 2016-06-21 | 2016-06-21 | Adjustable picosecond laser |
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| CN106058621A true CN106058621A (en) | 2016-10-26 |
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|---|---|---|---|
| CN201610447494.7A Pending CN106058621A (en) | 2016-06-21 | 2016-06-21 | Adjustable picosecond laser |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106785845A (en) * | 2017-01-22 | 2017-05-31 | 昆山华辰光电科技有限公司 | Variable impulse width Q adjusting optical fiber laser |
| CN109149328A (en) * | 2018-08-23 | 2019-01-04 | 中国科学院合肥物质科学研究院 | A kind of low-repetition-frequency linear cavity picosecond ytterbium-doping optical fiber laser of ambient stable |
| WO2019242555A1 (en) * | 2018-06-20 | 2019-12-26 | 华为技术有限公司 | Wavelength tunable laser |
| CN110690640A (en) * | 2018-07-06 | 2020-01-14 | 广东瀚盈激光科技有限公司 | Picosecond optical fiber seed laser source structure |
| CN112993728A (en) * | 2021-03-03 | 2021-06-18 | 电子科技大学 | C + L wave band rectangular laser pulse generation system with all-fiber structure |
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| CN101826696A (en) * | 2009-03-02 | 2010-09-08 | 北京大学 | High-energy low-repetition-frequency fiber laser |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106785845A (en) * | 2017-01-22 | 2017-05-31 | 昆山华辰光电科技有限公司 | Variable impulse width Q adjusting optical fiber laser |
| WO2019242555A1 (en) * | 2018-06-20 | 2019-12-26 | 华为技术有限公司 | Wavelength tunable laser |
| CN110620325A (en) * | 2018-06-20 | 2019-12-27 | 华为技术有限公司 | Wavelength tunable laser |
| CN110620325B (en) * | 2018-06-20 | 2022-02-11 | 华为技术有限公司 | Wavelength tunable laser |
| US11418001B2 (en) | 2018-06-20 | 2022-08-16 | Huawei Technologies Co., Ltd. | Wavelength-tunable laser |
| CN110690640A (en) * | 2018-07-06 | 2020-01-14 | 广东瀚盈激光科技有限公司 | Picosecond optical fiber seed laser source structure |
| CN110690640B (en) * | 2018-07-06 | 2021-12-28 | 广东瀚盈激光科技有限公司 | Picosecond optical fiber seed laser source structure |
| CN109149328A (en) * | 2018-08-23 | 2019-01-04 | 中国科学院合肥物质科学研究院 | A kind of low-repetition-frequency linear cavity picosecond ytterbium-doping optical fiber laser of ambient stable |
| CN109149328B (en) * | 2018-08-23 | 2020-12-25 | 中国科学院合肥物质科学研究院 | Environmentally stable low-repetition-frequency linear cavity picosecond ytterbium-doped fiber laser |
| CN112993728A (en) * | 2021-03-03 | 2021-06-18 | 电子科技大学 | C + L wave band rectangular laser pulse generation system with all-fiber structure |
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