CN104064939A - Mode-locked fiber laser - Google Patents
Mode-locked fiber laser Download PDFInfo
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- CN104064939A CN104064939A CN201410109975.8A CN201410109975A CN104064939A CN 104064939 A CN104064939 A CN 104064939A CN 201410109975 A CN201410109975 A CN 201410109975A CN 104064939 A CN104064939 A CN 104064939A
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Abstract
The invention discloses a mode-locked fiber laser. The mode-locked fiber laser comprises a polarization maintaining fiber loop mirror, a polarization maintaining active optical fiber, a pump coupler and a saturable absorber mirror which are welded in sequence, the free end of the pump coupler is connected with a semiconductor laser diode, and one free end of the polarization maintaining fiber loop mirror serves as an output coupling mirror. According to the mode-locked fiber laser, the polarization maintaining fiber loop mirror simultaneously serves as a laser cavity output mirror, a polarization selection device and a band-pass filter device, so that the structure complexity is reduced, the influence of the environment temperature on the mode-locked stability of the fiber laser is eliminated, the output performance of the mode-locked fiber laser is greatly improved, and the mode-locked pulse output featured with stable environment and high polarization degree is realized. The mode-locked fiber laser is featured with simple and compact structure, easiness in integration and easiness in operation, is rarely influenced by the environment change and has broad and important application in the science field, industry field and the like.
Description
Technical field
The present invention relates to fiber laser, particularly a kind of mode locked fiber laser based on polarization maintaining fiber ring mirror and saturable absorbing mirror.
Background technology
Mode locked fiber laser has huge potential using value at aspects such as the generations of laser material processing, optical frequency comb, optical sensing and super continuous spectrums.Conventionally the mode that obtains mode-locked laser output has following several:
One, in laser cavity, insert the nonlinear polarization rotation controller being formed by the polarizer, quarter-wave plate and 1/2nd wave plates.Its locked mode mechanism is: initial line polarized pulses, after quarter-wave plate, is divided into two orthogonal polarization components of left-handed and right-circularly polarized light that intensity is different.When transmitting in optical fiber, this two circular component can produce polarization state change owing to being subject to the nonlinear interaction of optical fiber.Pulse center part is different from the polarization state rotation amount that edge part occurs, and regulates the orientation of 1/2nd wave plates, can make pulse center part pass through, and edge part is prevented from, thereby forms equivalent saturable absorber locked mode.But the locked mode stability of this kind of method is subject to the impact of ambient temperature, but also need to regulate Polarization Controller, affect its application in practice.{ referring to F.
ilday, J.R.Buckley, H.Lim; F.W.Wise, and W.G.Clark, " Generation of50-fs; 5-nJ pulses at1.03 μ m from awave-breaking-free fiber laser, " Opt.Lett.28,1365-1367 (2003) .};
Two,, in fiber laser, a linear loop and a non-linear belt magnifying glass are coupled together and formed splayed configuration Mode-Locking Cavity by 2 × 2 fiber couplers.Its locked mode mechanism is to be divided into by fiber coupler the light that two bundle amplitudes equate, propagate in opposite directions by the signal pulse producing in linear loop.This two-beam transmits Cross-phase Modulation and the self phase modulation effect of being subject in non-linear loop, finally in the time that coupler coupling is interfered, and light pulse core generation transmission, edge part is reflected, and forms a kind fast saturable absorber locked mode mechanism.But the shortcoming of this method is in the time that ambient temperature changes, and mode-lock status is difficult to maintain.{ referring to L.M.Zhao, A.C.Bartnik, Q.Q.Tai, and F.W.Wise, " Generation of8nJ pulses froma dissipative-soliton fiber laser with a nonlinear optical loopmirror; " Opt.Lett.38,1942-1944 (2013) .}.
Summary of the invention
The present invention, on the basis of above-mentioned existing fiber laser mode-locking technique, proposes a kind of linearly polarized light fibre laser based on polarization maintaining fiber ring mirror and saturable absorbing mirror locked mode.This laser is using polarization maintaining fiber ring mirror simultaneously as laser cavity outgoing mirror, polarization selector and bandpass filtering device, not only reduce insertion loss, improve stability, and weakened the impact of ambient temperature on mode locked fiber laser stability, realize mode locking pulse output stable, high-polarization.This laser structure is simply compact, is easy to integratedly, has greatly expanded the range of application of mode locked fiber laser in fields such as science and industry.
Technical solution of the present invention is as follows:
A kind of mode locked fiber laser, feature be its formation comprise welding successively polarization maintaining fiber ring mirror, protect inclined to one side Active Optical Fiber, pumping coupler and saturable absorbing mirror, the free termination semiconductor laser diode of described pumping coupler, a free end of described polarization maintaining fiber ring mirror is as output coupling mirror.
Described polarization maintaining fiber ring mirror is be fused to together and formed by two outputs of 2 × 2 polarization-maintaining fiber coupler, and this annular mirror has different reflectivity for the light of propagating along the fast axle of polarization maintaining optical fibre and slow axis.
Described saturable absorbing mirror is semiconductor saturable absorbing mirror, Graphene saturable absorbing mirror or carbon nano-tube.
The present invention utilizes the polarization selector of polarization maintaining fiber ring mirror as laser cavity, and it,, to having different reflectivity along the light of the fast axle of polarization maintaining optical fibre and slow-axis direction propagation respectively, reaches the effect that polarization is selected.
The present invention utilizes polarization maintaining fiber ring mirror as shaping pulse band pass filter, and it is by the spectral filtering effect to chirped pulse, and slicing is carried out on the edge, front and back of paired pulses, thereby realizes the effect of stable pulse.
Described saturable absorbing mirror, as locked mode device, can be semiconductor saturable absorbing mirror, Graphene saturable absorbing mirror and carbon nano-tube etc., and it is by the non-linear absorption effect of paired pulses, thereby starts and maintain stable continuous locking mold.
Described pumping coupler is divided into two kinds: when fibre core pumping, can adopt wavelength division multiplexer; When cladding pumping, can adopt and draw cone bundling device, it can be introduced pump light in laser cavity efficiently.
The present invention compared with prior art, has the following advantages:
One, the present invention passes through polarization maintaining fiber ring mirror simultaneously as laser cavity outgoing mirror, polarization selector and bandpass filtering device, greatly improve the utilance of laser components and parts, reduce the insertion loss of device, and effectively improved the delivery efficiency of laser.
Two, the present invention, by a polarization selector using polarization maintaining fiber ring mirror as laser cavity, has effectively improved the degree of polarization of output mode locking pulse.
Three, the present invention is by the shaping pulse band pass filter using polarization maintaining fiber ring mirror as laser, effectively improve the stability of pulse, and in conjunction with saturable absorbing mirror mode-locking technique, eliminate traditional mode locked fiber laser shortcoming influenced by environmental temperature.
In a word, the present invention has compact conformation, operates succinctly, is subject to environmental change to affect the features such as little, has expanded its usage range.
Brief description of the drawings
Fig. 1 is the schematic block diagram of mode locked fiber laser of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention will be further described, but should not limit the scope of the invention with this.
First refer to Fig. 1, Fig. 1 is the schematic block diagram of mode locked fiber laser of the present invention.Also be the structural representation block diagram of one embodiment of the present of invention.As seen from the figure, mode locked fiber laser of the present invention is protected and is partially mixed ytterbium Active Optical Fiber 2, protects inclined to one side pumping coupler 3, saturable absorbing mirror 4 and semiconductor pumping sources 5 and form by welding optic fibre annular mirror 1 successively, 30cm.The pump light that pumping source 5 is launched injects laser cavity by protecting inclined to one side pumping coupler 3, and the guarantor of 30cm partially mixes ytterbium Active Optical Fiber 2 and serves as gain medium.Polarization maintaining fiber ring mirror 1 much larger than the reflection of light rate along its slow axis transmission, forms laser cavity in conjunction with saturable absorbing mirror to the reflection of light rate along the fast axle transmission of polarization maintaining optical fibre, realizes the effect of polarization selection and locked mode.
Experiment shows, the present embodiment has been realized the output that is subject to environmental change to affect very little mode locking pulse.
Claims (3)
1. a mode locked fiber laser, be characterised in that its formation comprise welding successively polarization maintaining fiber ring mirror (1), protect inclined to one side Active Optical Fiber (2), pumping coupler (3) and saturable absorbing mirror (4), the free termination semiconductor laser diode (5) of described pumping coupler (3), a free end of described polarization maintaining fiber ring mirror (1) is as output coupling mirror.
2. mode locked fiber laser according to claim 1, it is characterized in that: described polarization maintaining fiber ring mirror (1) is be fused to together and formed by two outputs of 2 × 2 polarization-maintaining fiber coupler, this annular mirror has different reflectivity for the light of propagating along the fast axle of polarization maintaining optical fibre and slow axis.
3. according to the mode locked fiber laser described in right 1, it is characterized in that: described saturable absorbing mirror (4) is semiconductor saturable absorbing mirror, Graphene saturable absorbing mirror or carbon nano-tube.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410109975.8A CN104064939A (en) | 2014-03-24 | 2014-03-24 | Mode-locked fiber laser |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410109975.8A CN104064939A (en) | 2014-03-24 | 2014-03-24 | Mode-locked fiber laser |
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| CN201410109975.8A Pending CN104064939A (en) | 2014-03-24 | 2014-03-24 | Mode-locked fiber laser |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110098557A (en) * | 2019-05-06 | 2019-08-06 | 武汉安扬激光技术有限责任公司 | A kind of all -fiber laser with active-passive lock mould |
| CN111106517A (en) * | 2019-12-26 | 2020-05-05 | 上海频准激光科技有限公司 | Erbium-doped fiber laser with same pump for random Raman fiber laser |
Citations (6)
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| JPH06283785A (en) * | 1992-11-24 | 1994-10-07 | Hewlett Packard Co <Hp> | Laser |
| EP1139519A2 (en) * | 2000-03-24 | 2001-10-04 | Oprel Technologies Inc. | Optical amplifier with active-loop mirror |
| US6560251B1 (en) * | 1999-11-03 | 2003-05-06 | Electronics And Telecommunications Research Institute | Mode-locked laser stabilizing apparatus and method thereof |
| CN101771232A (en) * | 2008-12-31 | 2010-07-07 | 中国科学院西安光学精密机械研究所 | Sigma cavity ultrashort pulse fiber laser with variable output rate |
| CN201656239U (en) * | 2010-04-29 | 2010-11-24 | 中国科学院上海光学精密机械研究所 | All fiber ytterbium-doped ultrashort pulse laser |
| CN102227043A (en) * | 2011-05-10 | 2011-10-26 | 中国科学院上海光学精密机械研究所 | linearly polarized light fiber laser base on polarization maintaining fiber polarization maintaining fiber annular mirror |
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2014
- 2014-03-24 CN CN201410109975.8A patent/CN104064939A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06283785A (en) * | 1992-11-24 | 1994-10-07 | Hewlett Packard Co <Hp> | Laser |
| US6560251B1 (en) * | 1999-11-03 | 2003-05-06 | Electronics And Telecommunications Research Institute | Mode-locked laser stabilizing apparatus and method thereof |
| EP1139519A2 (en) * | 2000-03-24 | 2001-10-04 | Oprel Technologies Inc. | Optical amplifier with active-loop mirror |
| CN101771232A (en) * | 2008-12-31 | 2010-07-07 | 中国科学院西安光学精密机械研究所 | Sigma cavity ultrashort pulse fiber laser with variable output rate |
| CN201656239U (en) * | 2010-04-29 | 2010-11-24 | 中国科学院上海光学精密机械研究所 | All fiber ytterbium-doped ultrashort pulse laser |
| CN102227043A (en) * | 2011-05-10 | 2011-10-26 | 中国科学院上海光学精密机械研究所 | linearly polarized light fiber laser base on polarization maintaining fiber polarization maintaining fiber annular mirror |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110098557A (en) * | 2019-05-06 | 2019-08-06 | 武汉安扬激光技术有限责任公司 | A kind of all -fiber laser with active-passive lock mould |
| CN111106517A (en) * | 2019-12-26 | 2020-05-05 | 上海频准激光科技有限公司 | Erbium-doped fiber laser with same pump for random Raman fiber laser |
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Application publication date: 20140924 |