CN104283094B - Femtosecond pulse direct amplifier with highly-doped gain fibers as gain media - Google Patents
Femtosecond pulse direct amplifier with highly-doped gain fibers as gain media Download PDFInfo
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- CN104283094B CN104283094B CN201410531545.5A CN201410531545A CN104283094B CN 104283094 B CN104283094 B CN 104283094B CN 201410531545 A CN201410531545 A CN 201410531545A CN 104283094 B CN104283094 B CN 104283094B
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Abstract
The invention discloses a femtosecond pulse direct amplifier with highly-doped gain fibers as gain media. The femtosecond pulse direct amplifier comprises an FC port seed pulse input end, an optical isolator, an optical circulator, a reflection type chirp grating, single mode fibers, two multimode pump lasers, a beam combiner, a double-clad gain fibers, a pump detacher and an output end, wherein the FC port seed pulse input end is welded to the optical isolator, the output end of the optical isolator is welded to the input end of the optical circulator, a reflection port of the optical circulator is welded to the reflection type chirp grating, the output end of the optical circulator is in splicing connection with the single mode fibers, the two multimode pump lasers are welded to the pump input end of the beam combiner, the single mode fibers are welded to the signal end of the beam combiner, the beam combiner is connected with the double-clad gain fibers, pump light is coupled into the double-clad gain fibers through the beam combiner, the double-clad gain fibers are welded to the pump detacher, and the pump detacher is connected with the output end. The femtosecond pulse direct amplifier has the advantages of being simple and compact in structure and stable in performance.
Description
Technical field
The invention belongs to optical fiber and laser technology field, more particularly to one kind make gain using highly doped gain fibre being situated between
The femtosecond pulse of matter directly amplifies device.
Background technology
High power femto second optical fiber laser is at aspects such as ultra-fast optical, super continuous spectrums generation, biological detection and retrofits
Have a wide range of applications.Affected by nonlinear effect, the average power limit of general femto second optical fiber laser is in tens milliwatts
Magnitude, need to be amplified to femtosecond pulse seed source to obtain high power femtosecond pulse.Common femtosecond amplifying technique is Zhou
Sing pulse amplifying, this technology needs first femtosecond pulse to be carried out chirp spread, to reduce the peak power of pulse, thus reducing
The nonlinear effect of amplification process, the pulse after amplification need to be through spatial dispersion compensating element, compression and back femtosecond magnitude.But, profit
The femto second pulse amplifier complex structure built with chirped pulse amplification, high cost, additionally, due to introducing space structure,
Therefore all-fiber cannot be realized, and the stability of a system is poor.
Therefore develop a kind of using the femtosecond pulse that highly doped gain fibre makees gain media directly amplify utensil have important
Meaning.
Content of the invention
In order to solve the above problems, it is an object of the invention to provide one kind makees gain media using highly doped gain fibre
Femtosecond pulse directly amplify device.
In order to achieve the above object, the present invention provide using highly doped gain fibre make gain media femtosecond pulse straight
Connect amplifier to include：FC port seed pulse input, optoisolator, optical circulator, reflective chirp grating, single-mode fiber,
Two multimode pump lasers, bundling device, double clad gain fibre, pumping stripper and output end；Wherein FC port seed arteries and veins
Rush input to weld with optoisolator；The input welding of the output end of optoisolator and optical circulator, the reflection of optical circulator
Port and reflective chirp grating welding, the output end of optical circulator and single-mode fiber welding；Two multimode pump lasers with
The pumping input phase welding of bundling device, signal end welding, bundling device and the double clad gain fibre of single-mode fiber and bundling device
It is connected, pump light is coupled into double clad gain fibre by bundling device, double clad gain fibre is welded with pumping stripper, pump
Pu stripper is simultaneously connected with output end.
Described double clad gain fibre is highly doped gain fibre, and its cladding pumping absorptivity is more than 1.5dB/cm, long
Degree is less than 20cm.
Described output end is cut sth. askew 8 degree of angles, to prevent self-oscillatory generation in amplifier.
The present invention provide using the advantage that the femtosecond pulse that highly doped gain fibre makees gain media directly amplifies device be
The use of high doping optical fiber is amplifier gain medium, the in the distance that femtosecond pulse is only 20cm in length realizes power amplification, greatly
Reduce greatly the nonlinear effect in femtosecond pulse laser amplification process, and structure is simple, compact, stable performance.
Brief description
The knot directly amplifying device using the femtosecond pulse that highly doped gain fibre makees gain media that Fig. 1 provides for the present invention
Structure schematic diagram.
Specific embodiment
Make gain media with specific embodiment provides to the present invention using highly doped gain fibre below in conjunction with the accompanying drawings
Femtosecond pulse directly amplifies device and is described in detail.
As shown in figure 1, the present invention provide directly amplified using the femtosecond pulse that highly doped gain fibre makees gain media
Device includes：FC port seed pulse input 1, optoisolator 2, optical circulator 3, reflective chirp grating 4, single-mode fiber 5, two
Individual multimode pump laser 7, bundling device 6, double clad gain fibre 9, pumping stripper 10 and output end 11；Wherein FC port kind
Subpulse input 1 is welded with optoisolator 2；The input welding of the output end of optoisolator 2 and optical circulator 3, light goes in ring
The reflector port of device 3 is welded with reflective chirp grating 4, the output end of optical circulator 3 and single-mode fiber 5 welding；Two multimodes
Pump laser 7 is welded with the pumping input phase of bundling device 6, the signal end welding of single-mode fiber 5 and bundling device 6, bundling device 6
It is connected with double clad gain fibre 9, pump light is coupled into double clad gain fibre 9, double clad gain fibre by bundling device 6
9 are welded with pumping stripper 10, and pumping stripper 10 is simultaneously connected with output end 11.
Described double clad gain fibre 9 is highly doped gain fibre, and its cladding pumping absorptivity is more than 1.5dB/cm, long
Degree is less than 20cm.
Now directly amplify device work by what the present invention provided using the femtosecond pulse that highly doped gain fibre makees gain media
Principle is described below：Femtosecond seed laser pulse enters optoisolator 2 through FC port seed pulse input 1, and optoisolator 2 can
Ensure seed light and amplify afterpulse one-way transmission, the dispersion parameter of reflective chirp grating 4 and single-mode fiber 5 is contrary, passes through
Adjust both dispersion measures, control seed pulse to enter pulse width and chirp value during double clad gain fibre 9；Two multimodes
Pump laser 7 enters double clad gain fibre 9 by bundling device 6 pumping, thus encouraging double clad gain fibre 9 to form population
Reversion, seed pulse is exaggerated through double clad gain fibre 9, and remaining pump light filters through pumping stripper 10, after amplification
Femtosecond laser export through output end 11, output end 11 is cut sth. askew 8 degree of angles, to prevent self-oscillatory generation in amplifier.
When seed pulse is for 1030-1064nm femtosecond pulse source, the dispersion parameter β 2 of reflective chirp grating 4 is negative
Value, single-mode fiber 5 is common 1064nm single-mode fiber, and its dispersion parameter is on the occasion of by adjusting both dispersion measure control kind
Subpulse enters pulse width and chirp value during double clad gain fibre 9；Double clad gain fibre 9 is high ytterbium-doped double-cladded-layer light
Fibre, its cladding pumping absorptivity is more than 3dB/cm, and length is less than 10cm；1 micron waveband Femtosecond pulse amplification can be realized.
When seed pulse is for 1530-1580nm femtosecond pulse source, the dispersion parameter β 2 of reflective chirp grating 4 is just
Value, single-mode fiber 5 is common 1550nm single-mode fiber, and its dispersion parameter is negative value, by adjusting both dispersion measure control kind
Subpulse enters pulse width and chirp value during double clad gain fibre 9；Double clad gain fibre 9 is high er-doped double clad light
Fibre, its cladding pumping absorptivity is more than 1.5dB/cm, and length is less than 20cm；1.5 micron waveband Femtosecond pulse amplifications can be realized.
When seed pulse is for 1980-2010nm femtosecond pulse source, the dispersion parameter β 2 of reflective chirp grating 4 is just
Value, single-mode fiber 5 is common 2000nm single-mode fiber, and its dispersion parameter is negative value, by adjusting both dispersion measure control kind
Subpulse enters pulse width and chirp value during double clad gain fibre 9；Double clad gain fibre 9 is highly doped thulium double clad light
Fibre, its cladding pumping absorptivity is more than 1.5dB/cm, and length is less than 20cm；2 micron waveband Femtosecond pulse amplifications can be realized.
The pulse width that femtosecond pulse of the present invention directly amplifies device output laser is femtosecond magnitude, the mean power after amplification
For 500mW about.
Claims (3)
1. a kind of directly amplify device using the femtosecond pulse that highly doped gain fibre makees gain media it is characterised in that：It includes：
FC port seed pulse input (1), optoisolator (2), optical circulator (3), reflective chirp grating (4), single-mode fiber
(5), two multimode pump lasers (7), bundling device (6), double clad gain fibre (9), pumping stripper (10) and output end
(11)；Wherein FC port seed pulse input (1) and optoisolator (2) weld；The output end of optoisolator (2) is gone in ring with light
The input welding of device (3), the reflector port of optical circulator (3) and reflective chirp grating (4) welding, optical circulator (3)
Output end and single-mode fiber (5) welding；The pumping input phase of two multimode pump lasers (7) and bundling device (6) is welded, single
The signal end welding of mode fiber (5) and bundling device (6), bundling device (6) is connected with double clad gain fibre (9), and pump light leads to
Cross bundling device (6) and be coupled into double clad gain fibre (9), double clad gain fibre (9) is welded with pumping stripper (10), pumping
Stripper (10) is simultaneously connected with output end (11).
2. according to claim 1 directly amplify device using the femtosecond pulse that highly doped gain fibre makees gain media, its
It is characterised by：Described double clad gain fibre (9) is highly doped gain fibre, and its cladding pumping absorptivity is more than 1.5dB/
Cm, length is less than 20cm.
3. according to claim 1 directly amplify device using the femtosecond pulse that highly doped gain fibre makees gain media, its
It is characterised by：Described output end (11) is cut sth. askew 8 degree of angles, to prevent self-oscillatory generation in amplifier.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410531545.5A CN104283094B (en) | 2014-10-10 | 2014-10-10 | Femtosecond pulse direct amplifier with highly-doped gain fibers as gain media |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410531545.5A CN104283094B (en) | 2014-10-10 | 2014-10-10 | Femtosecond pulse direct amplifier with highly-doped gain fibers as gain media |
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| CN104283094A CN104283094A (en) | 2015-01-14 |
| CN104283094B true CN104283094B (en) | 2017-02-15 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101840125A (en) * | 2010-04-21 | 2010-09-22 | 北京大学 | Negative dispersion pulse widening optical fiber amplifying device |
| CN102801095A (en) * | 2011-05-20 | 2012-11-28 | 以卡尔马激光名义经营的卡尔马光通信公司 | Generating laser pulses of narrow spectral linewidth based on chirping and stretching of laser pulses and subsequent power amplification |
| EP2779330A2 (en) * | 2013-03-15 | 2014-09-17 | Canon Kabushiki Kaisha | Soliton pulse optical fiber laser system |
| CN204088867U (en) * | 2014-10-10 | 2015-01-07 | 天津欧泰激光科技有限公司 | Highly doped gain fibre is used to make the direct amplifier of femtosecond pulse of gain media |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2648039A3 (en) * | 1997-03-21 | 2014-07-09 | Imra America, Inc. | High energy optical fiber amplifier for picosecond-nanosecond pulses for advanced material processing applications |
| US8731010B2 (en) * | 2008-05-27 | 2014-05-20 | Lawrence Livermore National Security, Llc | Phased laser array with tailored spectral and coherence properties |
-
2014
- 2014-10-10 CN CN201410531545.5A patent/CN104283094B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101840125A (en) * | 2010-04-21 | 2010-09-22 | 北京大学 | Negative dispersion pulse widening optical fiber amplifying device |
| CN102801095A (en) * | 2011-05-20 | 2012-11-28 | 以卡尔马激光名义经营的卡尔马光通信公司 | Generating laser pulses of narrow spectral linewidth based on chirping and stretching of laser pulses and subsequent power amplification |
| EP2779330A2 (en) * | 2013-03-15 | 2014-09-17 | Canon Kabushiki Kaisha | Soliton pulse optical fiber laser system |
| CN204088867U (en) * | 2014-10-10 | 2015-01-07 | 天津欧泰激光科技有限公司 | Highly doped gain fibre is used to make the direct amplifier of femtosecond pulse of gain media |
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