CN205583366U - Ultrashort pulsed optical fibre laser ware system with graphite alkene saturated absorbing body mode locking - Google Patents
Ultrashort pulsed optical fibre laser ware system with graphite alkene saturated absorbing body mode locking Download PDFInfo
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- CN205583366U CN205583366U CN201620359436.4U CN201620359436U CN205583366U CN 205583366 U CN205583366 U CN 205583366U CN 201620359436 U CN201620359436 U CN 201620359436U CN 205583366 U CN205583366 U CN 205583366U
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- absorbing body
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- optical fiber
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Abstract
The utility model discloses an ultrashort pulsed optical fibre laser ware system with graphite alkene saturated absorbing body mode locking, including the annular fiber laser kind component and the amplifier of warbling, annular fiber laser seed source packet is drawn together graphite alkene saturated absorbing body, wavelength division multiplexer, is mixed the yb active optical fibre, first passive optic fibre, output coupler, band pass filter, optical isolator and the passive optic fibre of second, the amplifier of warbling is including the one -level stretcher, one -stage size -expansion ware and the negative dispersion component that connect gradually, the one -stage size -expansion ware by the active optical fibre, close that restraint the ware and the pumping source is constituteed. The utility model discloses a linear chirped pulse can be exported to annular fiber laser kind component, these linear chirped pulse the amplifier of warbling amplify and negative dispersion component compensation under, thereby can obtain amplifying and go to warble and obtain to fly the second pulse, mix yb and fly second fiber laser and can realize. The utility model discloses filled and mixed the technique blank that yb flew second fiber laser.
Description
Technical field
This utility model relates to laser technology field, is specially one Graphene saturated
The ultrashort pulse fiber laser system of absorber locked mode.
Background technology
Ultrashort pulse (pulsewidth is less than 10ps) processing is cold working, eliminates processing
Heat effect around district, improves machining accuracy, and high power helps raising processing speed
Degree.Based on above-mentioned advantage, ultrashort pulse processing gradually obtains in micromachined field
Application.In order to meet the demand of application, need a kind of high-power ultrashort pulse light of exploitation badly
Fibre laser.
Producing ultrashort (femtosecond) optical fiber laser the best way at present is to satisfy with passive
With absorber plus gain fibre.The most multiplex quasiconductor saturated absorption mirror (SESAM)
As saturated absorbing body, its shortcoming is to need complicated technique, such as MOCVD or
Molecular beam epitaxy MBE, and high-energy heavy ion inject, in the devices introduce defect with
Reduce device recovery time.Additionally its light injury threshold is relatively low, it is difficult to improve pulse
Peak power.
It has recently found that two kinds of new saturated absorbing bodies that can substitute for SESAM.A kind of
Being SWCN (SWCNT), it is near infrared region saturated recovery time about
1ps, is suitable to psec or subpicosecond optical fiber laser, and existing the most many mixes Er light
The sample of fibre laser occurs.But it is due to the non-homogeneous helicity of SWCNT, difficult
In the character of this saturated absorbing body of control, owing to its resonant wavelength has with caliber
Close, so some non-resonant nanotubes can be there are and add extra insertion damage
Consumption, and the bundled nanotube tangled contains catalyst particles and bubble also can cause
High unsaturation loss.
Another kind is graphene film, and its advantage is that absorption is unrelated with wavelength saturated extensive
Multiple the time is extremely short, heat conductivity good, Absorber Bandwidth, loss are low, with low cost, therefore
Be suitable to make saturable absorber and be applied to the ultrashort pulse optical-fiber laser of various wavelength
Device；Saturation intensity is lower than SWCNT and SESAM, and therefore pulse is prone to self-starting；
Modulation depth can be adjusted (from 6.2% to 66.5%), therefore by changing the number of plies
Easily controllable pulse shaping；Ultrafast saturated absorption recovery time (fast 0.07ps, slowly
1.7ps), therefore be more suitable for produce femtosecond pulse.Use graphene film at present
The sample mixing Er femto second optical fiber laser, but the most with graphene film
The sample mixing Yb femto second optical fiber laser comes out.This is because in wavelength 1 μm, logical
Often passive fiber and Yb-doped fiber are normal dispersion, can only achieve several psec
Pulse, this utility model will provide a solution.
Utility model content
To this end, this utility model provides the super of a kind of Graphene saturated absorbing body locked mode
Ultra-short Fiber Laser system, it has been filled up and has mixed Yb femto second optical fiber laser field
Technological gap.
The ultrashort arteries and veins of Graphene saturated absorbing body locked mode provided by the utility model
Rush fiber ring laser system, including annular optical fiber laser seed source and amplification of warbling
Device, described annular optical fiber laser seed source includes Graphene saturated absorbing body, connection
Have LD pumping wavelength division multiplexer, mix Yb Active Optical Fiber, the first passive fiber,
Output coupler, band filter, optoisolator and the second passive fiber, graphite
Alkene saturated absorbing body, wavelength division multiplexer, mix Yb Active Optical Fiber, the first passive fiber,
Output coupler, band filter, optoisolator and the second passive fiber connect successively
Being connected into annular, described Graphene saturated absorbing body is three layer graphene films, described in warble
Amplifier includes one-level stretcher, first stage amplifier and the negative dispersion unit being sequentially connected with
Part, first stage amplifier is made up of Active Optical Fiber, bundling device and pumping source.
As preferred embodiment, the centre wavelength of described band filter is
1030nm, wave filter spectrum width is 8nm, and the radius of the first passive fiber is 3 μm, long
Degree is 1.2m, and the radius of the second passive fiber is 3 μm, a length of 3m, mixes Yb
The radius of Active Optical Fiber is 3 μm, and the power of a length of 0.8m, LD pumping is
140mW。
As preferred embodiment, one-level stretcher is the optical fiber of 100m length, one
The radius of the Active Optical Fiber of level amplifier is 20 μm, and a length of 2m, in pumping source
The a length of 975nm of cardiac wave, power is 1.2W.
As preferred embodiment, described negative dispersion element by warble reflecting grating and
Gyroscope forms.
As preferred embodiment, described in amplifier of warbling also include being connected to one-level
The device for picking of stretcher front end.
The beneficial effects of the utility model are: annular optical fiber laser of the present utility model
Seed source utilizes mixes Yb Active Optical Fiber and Graphene saturated absorbing body composition, and it is permissible
Output linearity chirped pulse, these linear-chirped-pulses amplifier of warbling amplification with
And under negative dispersion element compensating action, can be amplified and go to warble thus obtain and fly
Pulse per second (PPS), mixes Yb femto second optical fiber laser and is achieved.This utility model is filled up
Mix the technological gap of Yb femto second optical fiber laser.
Accompanying drawing explanation
Fig. 1 is the structural representation of annular optical fiber laser seed source of the present utility model
Figure；
Fig. 2 is the structural representation of amplifier of warbling of the present utility model.
Symbol description: 1-Graphene saturated absorbing body, 2-wavelength division multiplexer, 3-mixes YB
Active Optical Fiber, 4-LD pumping, 5-the first passive fiber, 6-output coupler, 7-carries
Bandpass filter, 8-optoisolator, 9-the second passive fiber, 10-device for picking, 11-one-level
Stretcher, 12-Active Optical Fiber, 13-bundling device, 14-pumping source, 15-warbles reflection light
Grid, 16-gyroscope.
Detailed description of the invention
Further retouch with reference to the accompanying drawings and in conjunction with the embodiments to this utility model
State.
See figures.1.and.2, this utility model Graphene saturated absorbing body locked mode
Ultrashort pulse fiber laser system is mainly by annular optical fiber laser seed source and Zhou
Amplifier of singing forms, and annular optical fiber laser seed source produces linear-chirped-pulse, line
Property chirped pulse amplify through amplifier of warbling and obtain required ultrashort arteries and veins after going to warble
Punching (femtosecond pulse).
It is concrete as it is shown in figure 1, annular optical fiber laser seed source includes that Graphene is saturated
Absorber 1, connection have the wavelength division multiplexer 2 of LD pumping 4, mix Yb Active Optical Fiber
3, the first passive fiber 5, output coupler 6, band filter 7, optoisolator
8 and second passive fiber 9, Graphene saturated absorbing body 1, wavelength division multiplexer 2,
Mix Yb Active Optical Fiber the 3, first passive fiber 5, output coupler 6, bandpass filtering
Device 7, optoisolator 8 and the second passive fiber 9 are sequentially connected with and circularize.Graphite
Alkene saturated absorbing body 1 is three layer graphene films, it is easy to starting of oscillation, and saturation depth is high.On
Stating structure is all that common single-mode fiber and fiber optic component are (except Graphene saturated absorption
Body) composition, compact conformation.
Determine annular chamber ultrafast pulse characteristic (pulsewidth, Spectral structure, frequency chirp,
Respiratory quotient, pulse energy etc.) main physical parameters be: the group velocity color that loop is total
Dissipate GVD (by fiber lengths regulation in loop), nonlinear phase change total amount
(and light non-linear by Active Optical Fiber determines Φ NL, can adjust by changing pump power
Joint), filter bandwidht BW.Such as Φ NL adds (GVD reduction, or BW
Reduce) cause chirped pulse width little, respiratory quotient increases, and frequency chirp is little,
The shape of burst spectrum becomes M shape from π shape.This utility model preferably employs,
The centre wavelength of band filter 7 is 1030nm, and wave filter spectrum width is 8nm, the
The radius of one passive fiber 5 is 3 μm, a length of 1.2m, the second passive fiber 9
Radius is 3 μm, a length of 3m, and the radius mixing Yb Active Optical Fiber 3 is 3 μm, long
Degree is 140mW for the power of 0.8m, LD pumping 4.Selected by band filter 7
Wavelength be 1030nm, mix Yb Active Optical Fiber 3 emission cross section this wavelength be local
Maximum, and spectrum width is maximum.Narrow based on pulse width produced by above-mentioned parameter is 6.21
Ps, pulse spectrum width 7.55nm (less than wave filter spectrum width 8nm), pulse frequency 40.8
MHz, peak power 89.4W, pulse energy 0.62nJ, mean power 25.3mW.
Owing to annular chamber is full normal dispersion, produced above-mentioned pulse wire resistant frequency changes
(warbling), pulse front edge frequency is relatively low, and tailing edge frequency is higher.Must be by negative color
Scattered element makes pulse go to warble, thus reaches burst pulse (pulse compression).
This utility model utilizes amplifier of warbling to above-mentioned pulse amplifying and to go to warble.
With reference to Fig. 2, amplifier of warbling includes that the one-level stretcher 11 being sequentially connected with, one-level are put
Big device and negative dispersion element, first stage amplifier is by Active Optical Fiber 12, bundling device 13
And pumping source 14 forms.One-level stretcher 11 can be suppressed in amplifier non-linear
Effect, to reduce pulse peak power, it typically utilizes the optical fiber that length is longer to realize,
Can be selected for when being embodied as 100m.First stage amplifier can amplify optical fibre ring and swash
The pulse power that light device seed source is exported, its design parameter is preferably, Active Optical Fiber
The radius of 12 is 20 μm, a length of 2m, and the centre wavelength of pumping source 14 is 975nm,
Power is 1.2W.It addition, it is constant and to improve last output to be it desired to mean power
Pulse peak power, can add a device for picking 10, and making pulse frequency is seed frequency
1/N
What can compensate with negative dispersion element to go to warble, such as photonic crystal
Optical fiber, optical fiber light (transmission or reflection), negative dispersion element in the present embodiment
By warbling reflecting grating 15 and gyroscope 16 forms.Chirped pulse passes through gyroscope 16
Incide reflecting grating 15 of warbling, reflect light back into gyroscope 16 and from gyroscope 16
Mouth output.Owing to grating is linear chrip, the light of different frequency is different on grating
Position is reflected, and obtains different delays, thus changes pulsewidth, such as pulse front edge
It is low frequency, reflects a long way off have big delay, otherwise tailing edge is high frequency, on hand
Reflection, postpones less, and this just makes pulse compression.
Foregoing pulse width is narrow for 6.21ps, pulse spectrum width 7.55nm, arteries and veins
Rush frequency 40.8MHz, peak power 89.4W, pulse energy 0.62nJ, average merit
The ultrashort pulse of rate 25.3mW is after amplifier of warbling processes, and stretcher exports arteries and veins
Wide 46.6ps, peak power 13.9W, spectrum width 11nm, other frequency, energy is flat
All power is constant.Amplifier output pulse peak power is 1.4kW, pulse energy 58.9
NJ, mean power 2.4W.By compressor (negative dispersion element) afterpulse width
For 290fs, peak power 177kW, spectrum width 11.1nm, pulse frequency is still 40.8
MHz, mean power is still 2.4W.
The foregoing is only preferred embodiment of the present utility model, be not used to limit
This utility model processed, for a person skilled in the art, this utility model is permissible
There are various modifications and variations.All within spirit of the present utility model and principle, made
Any modification, equivalent substitution and improvement etc., should be included in guarantor of the present utility model
Within the scope of protecting.
Claims (5)
1. by the ultrashort pulse fiber laser system of Graphene saturated absorbing body locked mode, its
It is characterised by: include annular optical fiber laser seed source and amplifier of warbling, described ring
Shape optical fiber laser seed source includes that Graphene saturated absorbing body, connection have LD pumping
Wavelength division multiplexer, mix Yb Active Optical Fiber, the first passive fiber, output coupler,
Band filter, optoisolator and the second passive fiber, Graphene saturated absorbing body,
Wavelength division multiplexer, mix Yb Active Optical Fiber, the first passive fiber, output coupler,
Band filter, optoisolator and the second passive fiber are sequentially connected with and circularize, institute
Stating Graphene saturated absorbing body is three layer graphene films, described in amplifier of warbling include depending on
The one-level stretcher of secondary connection, first stage amplifier and negative dispersion element, one-level is amplified
Device is made up of Active Optical Fiber, bundling device and pumping source.
The ultrashort arteries and veins of Graphene saturated absorbing body locked mode the most according to claim 1
Rush fiber ring laser system, it is characterised in that: the centre wavelength of described band filter
For 1030nm, wave filter spectrum width is 8nm, and the radius of the first passive fiber is 3 μm,
A length of 1.2m, the radius of the second passive fiber is 3 μm, and a length of 3m mixes Yb
The radius of Active Optical Fiber is 3 μm, and the power of a length of 0.8m, LD pumping is
140mW。
The ultrashort arteries and veins of Graphene saturated absorbing body locked mode the most according to claim 1
Rush fiber ring laser system, it is characterised in that: one-level stretcher is the light of 100m length
Fibre, the radius of the Active Optical Fiber of first stage amplifier is 20 μm, a length of 2m, pumping
The centre wavelength in source is 975nm, and power is 1.2W.
The ultrashort arteries and veins of Graphene saturated absorbing body locked mode the most according to claim 1
Rush fiber ring laser system, it is characterised in that: described negative dispersion element is by reflection of warbling
Grating and gyroscope composition.
The ultrashort arteries and veins of Graphene saturated absorbing body locked mode the most according to claim 1
Rush fiber ring laser system, it is characterised in that amplifier of warbling described in: also includes connecting
Device for picking in one-level stretcher front end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620359436.4U CN205583366U (en) | 2016-04-26 | 2016-04-26 | Ultrashort pulsed optical fibre laser ware system with graphite alkene saturated absorbing body mode locking |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620359436.4U CN205583366U (en) | 2016-04-26 | 2016-04-26 | Ultrashort pulsed optical fibre laser ware system with graphite alkene saturated absorbing body mode locking |
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| CN205583366U true CN205583366U (en) | 2016-09-14 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105703209A (en) * | 2016-04-26 | 2016-06-22 | 芜湖安瑞激光科技有限公司 | Ultra-short pulse fiber laser system using graphene saturable absorber to lock mode |
| CN106981815A (en) * | 2017-05-08 | 2017-07-25 | 中国兵器装备研究院 | A kind of high power all -fiber cascade amplifier |
| CN107732644A (en) * | 2017-10-27 | 2018-02-23 | 深圳市浩铼科技有限责任公司 | A kind of laser seed source system and preparation method |
-
2016
- 2016-04-26 CN CN201620359436.4U patent/CN205583366U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105703209A (en) * | 2016-04-26 | 2016-06-22 | 芜湖安瑞激光科技有限公司 | Ultra-short pulse fiber laser system using graphene saturable absorber to lock mode |
| CN106981815A (en) * | 2017-05-08 | 2017-07-25 | 中国兵器装备研究院 | A kind of high power all -fiber cascade amplifier |
| CN106981815B (en) * | 2017-05-08 | 2019-07-26 | 中国兵器装备研究院 | A kind of high power all -fiber cascade amplifier |
| CN107732644A (en) * | 2017-10-27 | 2018-02-23 | 深圳市浩铼科技有限责任公司 | A kind of laser seed source system and preparation method |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160914 Termination date: 20210426 |
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| CF01 | Termination of patent right due to non-payment of annual fee |