CN110364923A - A kind of full polarization fibre mode-locked laser based on phase bias - Google Patents
A kind of full polarization fibre mode-locked laser based on phase bias Download PDFInfo
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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
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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
- H01S3/10—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
- H01S3/1106—Mode locking
Abstract
The invention discloses a kind of full polarization fibre mode-locked laser based on phase bias.First polarization maintaining optical fiber collimator, wavelength division multiplexer, polarization-maintaining gain fibre, the second polarization maintaining optical fiber collimator, the first polarization splitting prism, Faraday rotator, birefringece crystal, the second polarization splitting prism constitute nonlinear amplified loop mirror in full polarization fibre mode-locked laser of the invention, and nonlinear amplified loop mirror plays the role of fast saturable absorber in mode locked fiber laser；Pulse is divided into two-beam by polarization splitting prism in annular mirror, it rotates and rotates clockwise counterclockwise respectively, Faraday rotation and birefringece crystal constitute phase-shift unit, light beam and the second beam light generate certain phase difference, two-beam interferes realization nonlinear phase shift mode locking after closing beam, this greatly reduces the threshold value of mode locking starting, while improving whole stability and reliability, Optical Maser System is simplified, coupled power and efficiency are improved.
Description
Technical field
The present invention relates to Fiber laser technology more particularly to a kind of full polarization fibre mode-locked lasers based on phase bias
Device.
Background technique
For mode locked fiber laser by feat of at low cost, stability is high, and compact-sized, peak power is high, ultrashort excellent of pulse
Gesture plays irreplaceable role in scientific research and industrial processes.But the laser that comparison is common, mode-locked laser
It is difficult to self-starting, vulnerable to external interference, price is high, hampers its application.In recent years, the demand of ultrafast laser more expands.Especially
It is the high-end micro Process market of industry that rapidly increased in recent years to high-end picosecond and the demand sustainable growth of femto-second laser.So
And using industry as these fields of representative to ultrafast laser under various circumstances, the stability of operating proposes higher want
It asks, and the stability and reliability of technical grade ultrafast laser especially seed source are not well solved always.It utilizes
Optical fiber technology replaces the seed source technology of solid to itself have many advantages, swashs in optical fiber technology using full polarization is fine
Light device is more considered the effective ways that can resist environment transformation.
Non-linear loop reflecting mirror, saturable absorber, nonlinear polarization rotation are three kinds of masters in mode locked fiber laser
The mode locking mechanism wanted.The 8 font mode locked fiber lasers that non-linear loop reflecting mirror is constituted are because be non PM fiber structure, lock
Mould difficulty in starting often needs external push；Semiconductor saturable absorber has the service life in saturable absorber, is easily damaged；Its
His carbon-based saturable absorber, such as carbon nanotube, graphene etc. are easy to deteriorate in a natural environment, lose mode locking starting
Function.Nonlinear polarization rotation can provide reliable and stable mode locking Initiated Mechanism, provide very high mean power, Er Qieke
Using almost all of pulse shaping mechanism, obtain high repetition frequency or low-repetition-frequency, picosecond or femtosecond pulse column.But it is this
Mode locking mechanism determine it is intracavitary can only be mostly very sensitive to environment with it using non PM fiber, after losing mode locking, mode locking
State is not easy to restore.
Non-linear loop reflecting mirror was once earliest mode-locking device, (8 fonts of double loop optical fiber laser made of it
Optical fiber laser) mode locking pulse can be provided.But it is generally not self-starting.Reason is that its loop is zero offset.
And in zero offset, susceptibility very little of the loop reflecting mirror to nonlinear phase shift.Therefore a phase bias is needed.It is so-called
Phase bias refers to that the light of counterpropagate in same optical path undergoes different phase shifts.
Jungwon Kim(Nintaus member) et al. the paper " Subfemtosecond that is delivered on Optics Letters
Synchronization of microwave oscillators with mode-locked Er-fiber lasers " in
Lightwave-Microwave phase discriminator, asymmetric phase-shifter is utilized, and use it as the phase bias device in fiber optic loop.
Patent application " the Laser with non-linear optical loop of Menlo Systems company
mirror".(US201500711322) phase-shifter and phase bias method of Jungwon Kim etc. is utilized, constitutes a kind of lock
Mode laser.
" the A mode-locked thulium- that Honzatko et al. was delivered on Optics Letters in 2013
Doped fiber laser based on a nonlinear loop mirror " paper and Huang et al. be in 2015 years
" the Direct generation of 2W average-power and 232nJ delivered on Optics Letters
Picosecond pulses from an ultra-simple Yb-doped double-clad fiber laser " paper,
Without phase bias optical element, therefore modelocking threshold is high.
Summary of the invention
The technical problems to be solved by the present invention are:
In order to obtain mode locked fiber laser self-starting and mode locking steady in a long-term, overcome due to environmental parameters such as temperature, vibrations
Variation caused by mode locking deteriorate, the invention proposes a kind of full polarization fibre mode-locked laser based on phase bias.
The present invention uses following technical scheme to solve above-mentioned technical problem:
A kind of full polarization fibre mode-locked laser based on phase bias is provided, the full polarization fibre laser includes: pumping
Source, the first polarization maintaining optical fiber collimator, the second polarization maintaining optical fiber collimator, wavelength division multiplexer, polarization-maintaining gain fibre, the first polarization spectro
Prism, the second polarization splitting prism, Faraday rotator, birefringece crystal, reflecting mirror；
Wherein, the pump ports of the wavelength division multiplexer connect pumping source；The input port connection first of the wavelength division multiplexer
Polarization maintaining optical fiber collimator, the public port of the wavelength division multiplexer connect polarization-maintaining gain fibre, the polarization-maintaining gain fibre it is another
One end connects the second polarization maintaining optical fiber collimator；Two polarization-maintaining light of the first polarization maintaining optical fiber collimator and the second polarization maintaining optical fiber collimator
Fine fast axle is orthogonal and the slow axis of two polarization maintaining optical fibres is orthogonal；It is protected through the first polarization maintaining optical fiber collimator and second
The laser of inclined optical fiber collimator output is a branch of through the synthesis of the first polarization splitting prism, closes Shu Jiguang and successively passes through Faraday rotation
Device, birefringece crystal, the second polarization splitting prism and reflecting mirror；Incident light polarization direction is rotated 45 by the Faraday rotator
Degree；Fraction of laser light exports after the reflection of the second polarization splitting prism；Through the second polarization splitting prism laser through the reflection
Backtracking after mirror reflection.
Foregoing full polarization fibre mode-locked laser further includes further bandwidth control element or dispersion member
Part.
Foregoing full polarization fibre mode-locked laser, further, the bandwidth control element uses optical filter, if
It sets between the second polarization splitting prism and reflecting mirror, to limit spectrum.
Foregoing full polarization fibre mode-locked laser, further, the dispersion element use grating pair, and setting exists
Between second polarization splitting prism and reflecting mirror, to dispersion compensation.
Foregoing full polarization fibre mode-locked laser, further, the density range of the grating are 150/milli
Rice ~ 2000/millimeter.
Foregoing full polarization fibre mode-locked laser further includes further half wave plate, is arranged first
Between polarization maintaining optical fiber collimator and the first polarization splitting prism, to adjust clockwise transmission light beam and counterclockwise transmission light beam
Beam intensity ratio.
Foregoing full polarization fibre mode-locked laser, further, the fast axle and slow axis of the birefringece crystal are drawn
Enter asymmetric phase shift, leads to the phase shift difference for propagating and propagating counterclockwise light beam clockwise, the phase shift differenceBy birefringece crystal
Property and thickness determine, i.e.,, whereinFor the refractive index of e light,For the refractive index of o light,lFor
The thickness of birefringece crystal,λFor wavelength.
Foregoing full polarization fibre mode-locked laser, further, polarization maintaining optical fibre used uses bais single-mode light
Fibre, big mode field area polarization maintaining optical fibre, doping gain polarization maintaining optical fibre, big mode field area double clad polarization maintaining optical fibre and polarization-maintaining photonic crystal
One of optical fiber is a variety of.
Foregoing full polarization fibre mode-locked laser, further, the Faraday rotator uses sheet type method
Rotator or magneto-optical crystal is drawn to be inserted into the Faraday rotator constituted in permanent magnet.
The invention adopts the above technical scheme compared with prior art, has following technical effect that
Full polarization fibre mode-locked laser based on phase bias of the invention, pulse have rotation counterclockwise in intracavitary oscillation respectively
Two-beam is propagated with clockwise, Faraday rotator and birefringece crystal constitute phase-shift unit, propagate clockwise with counterclockwise
Two-beam generates certain phase difference, and light beam clockwise and light beam counterclockwise realize nonlinear phase shift mode locking after closing beam interferometer, this
Greatly reduce the threshold value of mode locking starting；Whole stability and reliability are improved using full polarization fibre structure simultaneously；It adopts
It is replaced with the Faraday rotator constituted in the Faraday rotator of film magneto-optic memory technique or magneto-optical crystal insertion permanent magnet conventional
Optical fiber type isolator or crystal magneto-optic memory technique free space isolator, simplify Optical Maser System.
Detailed description of the invention
Fig. 1 is the schematic diagram of the embodiment of the present invention one；
Fig. 2 is the schematic diagram of the embodiment of the present invention two；
Fig. 3 is the schematic diagram of the embodiment of the present invention three；
Fig. 4 is the schematic diagram of the embodiment of the present invention four.
Specific embodiment
Technical solution of the present invention is described in further detail with reference to the accompanying drawing.
Those skilled in the art can understand that unless otherwise defined, all terms used herein (including skill
Art term and scientific term) there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Also
It should be understood that those terms such as defined in the general dictionary should be understood that have in the context of the prior art
The consistent meaning of meaning will not be explained in an idealized or overly formal meaning and unless defined as here.
In the present invention, pumping source is connected to the pumping end of wavelength division multiplexer；By the first polarization maintaining optical fiber collimator and wavelength-division
Input terminal is multiplexed to connect by polarization maintaining optical fibre, wavelength division multiplexer common end connect with polarization-maintaining gain fibre, polarization-maintaining gain fibre and
Second polarization maintaining optical fiber collimator is connected by polarization maintaining optical fibre；
The energy of pulse as needed determines the pump power of pumping source；
Pump power is increased on optical fiber laser threshold value to intracavitary by pumping source laser coupled by wavelength division multiplexer,
By being directed at opposite the first polarization maintaining optical fiber collimator and the second polarization maintaining optical fiber collimator, vibrate laser；
Oscillation in laser forms random small-pulse effect；
It propagates pulse counterclockwise to be emitted from the first polarization maintaining optical fiber collimator, pulse penetrates the first polarization splitting prism, is incident to method
Draw rotator；The polarization direction of incident light is rotated 45 degree by Faraday rotator, makes the one of polarization direction and birefringece crystal
A axis is parallel；Then it is incident to birefringece crystal, phase shift occursAfterwards, then pass through the second polarization splitting prism, s polarization point
Amount is reflected through the second polarization splitting prism to be exported, after p-polarization component is interfered here with the p-polarization component for propagating light beam clockwise
Through the second polarization splitting prism；
It propagates pulse clockwise to be emitted from the second polarization maintaining optical fiber collimator, by the first polarization splitting prism and propagation light counterclockwise
Shu Hecheng is a branch of, is incident to Faraday rotator；The polarization direction of incident light is rotated 45 degree by Faraday rotator, makes polarization side
To parallel with another axis of birefringece crystal；Then it is incident to birefringece crystal, phase shift occursAfterwards, then pass through second
Polarization splitting prism, s polarized component is reflected through the second polarization splitting prism to be exported, and p-polarization component and propagation light beam p counterclockwise are inclined
Vibration component penetrates the second polarization splitting prism after interfering here；
Through the laser beam of the second polarization splitting prism, it is incident to dispersion compensation device or bandwidth control element, is finally hung down
Directly it is incident on reflecting mirror；The backtracking after reflecting mirror reflects successively is controlled by dispersion compensation device or bandwidth again
Element, the second polarization splitting prism, birefringece crystal；Laser, which again passes by after phase shift occurs for birefringece crystal, becomes elliptical polarization
Light again passes by Faraday rotator rear polarizer direction and rotates 45 degree again；The first polarization splitting prism is passed through in elliptical polarization pulse
Afterwards, s polarized component is reflected by the first polarization splitting prism into the second polarization maintaining optical fiber collimator, using polarization-maintaining gain
The amplification of optical fiber and pump light is emitted to form a propagation counterclockwise from the first polarization maintaining optical fiber collimator into wavelength division multiplexer
Circulation；P-polarization component enters in the first polarization maintaining optical fiber collimator through the first polarization splitting prism, enters back into wavelength-division multiplex
Device is emitted to form a propagation clockwise from the second polarization maintaining optical fiber collimator by the amplification of pump light and polarization-maintaining gain fibre
Circulation；The pulse propagated clockwise and anticlockwise is respectively formed circuit, and laser forms oscillation.
First polarization maintaining optical fiber collimator, wavelength division multiplexer, polarization-maintaining gain fibre, the second polarization maintaining optical fiber collimator, first are partially
Vibration Amici prism, Faraday rotator, birefringece crystal, the second polarization splitting prism constitute nonlinear amplified loop mirror, non-thread
Property amplification annular mirror play the role of fast saturable absorber in mode locked fiber laser, Faraday rotation, birefringece crystal make
It obtains propagated laser clockwise and anticlockwise and generates certain phase difference, constitute phase bias, the reflectivity of pulse is put with non-linear
Two-beam nonlinear phase shift amount is related in big annular mirror, and reflectivity is the function of the phase shift difference of two-beam, introduces phase shift offset phase
Shifting amount is bigger, and reflectivity is higher, and phase-shift phase more antiradar reflectivity is lower, and the central part of pulse is strong, in nonlinear amplified loop mirror
The phase-shift phase of generation is big, so reflectivity is high, pulse is more easier to form oscillation, so that nonlinear amplified loop mirror is realized
The effect of fast saturable absorber, realizes Mode-locking For Lasers, forms ultrashort pulse output.
Embodiment one
As shown in Figure 1, the full polarization fibre mode-locked laser of the invention based on phase bias includes: pumping source 2, the first polarization-maintaining
Optical fiber collimator 3, the second polarization maintaining optical fiber collimator 10, wavelength division multiplexer 1, polarization-maintaining gain fibre 11, the first polarization splitting prism
9, the second polarization splitting prism 6, Faraday rotator 8, birefringece crystal 7, grating are to 5, reflecting mirror 4；Wherein, wavelength division multiplexer
1 has pump ports, input port, public port；Pumping source 2 passes through polarization maintaining optical fibre and 1 pump ports of wavelength division multiplexerConnection；First polarization maintaining optical fiber collimator 3 and 1 input port of wavelength division multiplexerConnection；Polarization-maintaining gain fibre 11 and wavelength-division are multiple
With 1 public port of deviceConnection.Two polarization maintaining optical fibres of the first polarization maintaining optical fiber collimator 3 and the second polarization maintaining optical fiber collimator 10
Fast axle is orthogonal and the slow axis of two polarization maintaining optical fibres is orthogonal；Wherein, pulse is defeated in the first polarization maintaining optical fiber collimator 3
Pulse polarization direction out is horizontal direction, the i.e. direction p.Oscillation forms random small-pulse effect in the laser, and random small-pulse effect exists
It is divided into fiber optic loop and propagates and propagate counterclockwise two components clockwise；Pulse is propagated counterclockwise from the first polarization maintaining optical fiber collimator
3 outgoing, pulse penetrate the first polarization splitting prism 9, are incident to Faraday rotator 8；Faraday rotator 8 is by the inclined of incident light
Vibration direction rotates 45 degree, keeps polarization direction parallel with fast (or slow axis) axis of birefringece crystal 7；Then it is incident to birefringece crystal
7, phase shift occursAfterwards, it is incident to the second polarization splitting prism 6, s polarized component reflects defeated through the second polarization splitting prism 6
Out, through the second polarization splitting prism 6 after p-polarization component and the p-polarization component clockwise for propagating light beam are interfered here；Up time
Needle is propagated pulse and is emitted from the second polarization maintaining optical fiber collimator 10, closes by the first polarization splitting prism 9 and propagation light beam counterclockwise
At a branch of, it is incident to Faraday rotator 8；The polarization direction of incident light is rotated 45 degree by Faraday rotator 8, makes polarization direction
It is parallel with slow axis (or the fast axle) of birefringece crystal 7 that phase shift occursAfterwards, the second polarization splitting prism 6, s polarization point are incident to
Amount is reflected through the second polarization splitting prism 6 to be exported, and p-polarization component is interfered here with the p-polarization component counterclockwise for propagating light beam
The second polarization splitting prism 6 is penetrated afterwards；Through the second polarization splitting prism 6 laser light incident to grating to 5, last vertical incidence
Onto reflecting mirror 4；The backtracking after the reflection of reflecting mirror 4, it is double again successively by grating to the 5, second polarization splitting prism 6
Refracting crystal 7；Laser, which again passes by after phase shift occurs for birefringece crystal 7, becomes elliptically polarized light, again passes by Faraday rotation
8 rear polarizer direction of device rotates 45 degree again；After the first polarization splitting prism 9, s polarized component passes through first for elliptical polarization pulse
Polarization splitting prism 9 is reflected into the second polarization maintaining optical fiber collimator 10, using polarization-maintaining gain fibre 11 and pump light
Amplification forms one from the outgoing of the first polarization maintaining optical fiber collimator 3 and propagates circulation counterclockwise into wavelength division multiplexer 1；P-polarization point
Amount enters in the first polarization maintaining optical fiber collimator 3 through the first polarization splitting prism 9, into wavelength division multiplexer 1, using polarization-maintaining
The amplification of gain fibre 11 and pump light forms one from the outgoing of the second polarization maintaining optical fiber collimator 10 and propagates circulation clockwise；It is suitable
Hour hands and the pulse propagated counterclockwise are respectively formed circuit, and laser forms oscillation.First polarization maintaining optical fiber collimator 3, wavelength division multiplexer
1, polarization-maintaining gain fibre 11, the second polarization maintaining optical fiber collimator 10, the first polarization splitting prism 9, Faraday rotator 8, birefringent
Crystal 7, the second polarization splitting prism 6 constitute nonlinear amplified loop mirror, and nonlinear amplified loop mirror is in mode locked fiber laser
In play the role of fast saturable absorber, Faraday rotation 8, birefringece crystal 7 make propagated laser production clockwise and anticlockwise
Raw certain phase difference constitutes phase bias, two-beam nonlinear phase shift in the reflectivity and nonlinear amplified loop mirror of pulse
Measure related, reflectivity is the function of the phase shift difference of two-beam, introduces that the bigger reflectivity of phase shift offset phase-shift phase is higher, and phase-shift phase is got over
Antiradar reflectivity is lower, and the central part of pulse is strong, and the phase-shift phase generated in nonlinear amplified loop mirror is big, so reflectivity
Height, pulse are more easier to form oscillation, so that nonlinear amplified loop mirror realizes the effect of fast saturable absorber, realize
Mode-locking For Lasers form ultrashort pulse output.
Embodiment two
As shown in Fig. 2, as shown in Figure 1, the full polarization fibre mode-locked laser of the invention based on phase bias includes: pumping source
2, the first polarization maintaining optical fiber collimator 3, the second polarization maintaining optical fiber collimator 10, wavelength division multiplexer 1, polarization-maintaining gain fibre 11, first are inclined
Shake Amici prism 9, the second polarization splitting prism 6, Faraday rotator 8, birefringece crystal 7, reflecting mirror 4 and bandwidth control element
12；Wherein, wavelength division multiplexer 1 has pump ports, input port, public port.It is controlled in the present embodiment using bandwidth
Element replaces grating pair, and bandwidth control element uses optical filter 12, is arranged between birefringece crystal and reflecting mirror, to limit
Spectrum, other are the same as embodiment one.
Embodiment three
As shown in figure 3, as shown in Figure 1, the full polarization fibre mode-locked laser of the invention based on phase bias includes: pumping source
2, the first polarization maintaining optical fiber collimator 3, the second polarization maintaining optical fiber collimator 10, wavelength division multiplexer 1, polarization-maintaining gain fibre 11, first are inclined
Amici prism 9, the second polarization splitting prism 6, Faraday rotator 8, birefringece crystal 7, grating shake to 5, reflecting mirror 4 and two points
One of wave plate 13；Wherein, wavelength division multiplexer 1 has pump ports, input port, public port.It is used in the present embodiment
Half wave plate is arranged to adjust the beam intensity ratio of transmitting beam clockwise and anticlockwise in the first polarization maintaining optical fiber collimator
And first between polarization splitting prism, other are the same as embodiment one.
Example IV
As shown in figure 4, as shown in Figure 1, the full polarization fibre mode-locked laser of the invention based on phase bias includes: pumping source
2, the first polarization maintaining optical fiber collimator 3, the second polarization maintaining optical fiber collimator 10, wavelength division multiplexer 1, polarization-maintaining gain fibre 11, first are inclined
Shake Amici prism 9, the second polarization splitting prism 6, Faraday rotator 8, birefringece crystal 7, reflecting mirror 4, bandwidth control element
12 and half wave plate 13；Wherein, wavelength division multiplexer 1 has pump ports, input port, public port.This implementation
Bandwidth control element is used to replace grating pair in example, bandwidth control element uses optical filter 12, and setting is in birefringece crystal and instead
It penetrates between mirror, to limit spectrum；Beam intensity ratio of the half wave plate to adjust transmitting beam clockwise and anticlockwise, setting
Between the first polarization maintaining optical fiber collimator and the first polarization splitting prism, other are the same as embodiment one.
It is finally noted that the purpose for publicizing and implementing mode is to help to further understand the present invention, but ability
The technical staff in domain is understood that without departing from the spirit and scope of the invention and the appended claims, various replacements and
Modification is all possible.Therefore, the present invention should not be limited to embodiment disclosure of that, the scope of protection of present invention with
Subject to the range that claims define.
Claims (8)
1. a kind of full polarization fibre mode-locked laser based on phase bias, which is characterized in that the full polarization fibre laser
It include: pumping source, the first polarization maintaining optical fiber collimator, the second polarization maintaining optical fiber collimator, wavelength division multiplexer, polarization-maintaining gain fibre,
One polarization splitting prism, the second polarization splitting prism, Faraday rotator, birefringece crystal, reflecting mirror；Wherein, the wavelength-division
The pump ports of multiplexer connect pumping source；The input port of the wavelength division multiplexer connects the first polarization maintaining optical fiber collimator, institute
The public port connection polarization-maintaining gain fibre of wavelength division multiplexer is stated, the other end of the polarization-maintaining gain fibre connects the second polarization-maintaining light
Fine collimator；The fast axle of two polarization maintaining optical fibres of the first polarization maintaining optical fiber collimator and the second polarization maintaining optical fiber collimator is orthogonal,
And the slow axis of two polarization maintaining optical fibres is orthogonal；It is exported through the first polarization maintaining optical fiber collimator and the second polarization maintaining optical fiber collimator
Laser synthesizes a branch of after the first polarization splitting prism, closes Shu Jiguang and successively passes through Faraday rotator, birefringece crystal, the
Two polarization splitting prisms and reflecting mirror；Incident light polarization direction is rotated 45 degree by the Faraday rotator；Fraction of laser light is through
It is exported after the reflection of two polarization splitting prisms；It is returned through the laser of the second polarization splitting prism through the reflecting mirror reflection road Hou Yuan
It returns.
2. full polarization fibre mode-locked laser as described in claim 1, which is characterized in that further include bandwidth control element or
Dispersion element.
3. full polarization fibre mode-locked laser as claimed in claim 2, which is characterized in that the bandwidth control element is using filter
Mating plate is arranged between the second polarization splitting prism and reflecting mirror, to limit spectrum.
4. full polarization fibre mode-locked laser as claimed in claim 2, which is characterized in that the dispersion element uses grating
It is right, it is arranged between the second polarization splitting prism and reflecting mirror, to dispersion compensation.
5. full polarization fibre mode-locked laser as claimed in claim 2, which is characterized in that it further include half wave plate, if
It sets between the first polarization maintaining optical fiber collimator and the first polarization splitting prism, to adjust clockwise transmission light beam and pass counterclockwise
Lose the beam intensity ratio of beam.
6. full polarization fibre mode-locked laser as described in claim 1, which is characterized in that the fast axle of the birefringece crystal
Introducing asymmetric phase shift with slow axis leads to phase shift difference。
7. full polarization fibre mode-locked laser as described in claim 1, which is characterized in that polarization maintaining optical fibre used uses polarization-maintaining
Single mode optical fiber, big mode field area polarization maintaining optical fibre, doping gain polarization maintaining optical fibre, big mode field area double clad polarization maintaining optical fibre and polarization-maintaining light
One of photonic crystal fiber is a variety of.
8. full polarization fibre mode-locked laser as described in claim 1, which is characterized in that the Faraday rotator is using thin
The Faraday rotator constituted in chip Faraday rotator or magneto-optical crystal insertion permanent magnet.
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Cited By (10)
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| CN111969401A (en) * | 2020-08-31 | 2020-11-20 | 中国科学院合肥物质科学研究院 | Pulse energy increasing method of self-starting Figure-9 passive mode-locking optical fiber laser |
| CN113206426A (en) * | 2021-04-28 | 2021-08-03 | 中国人民解放军国防科技大学 | Compact high-repetition-frequency full-polarization-maintaining optical fiber mode-locked laser |
| CN113206430A (en) * | 2021-03-30 | 2021-08-03 | 华南师范大学 | Phase shifter, mode-locked laser and control method of mode-locked laser |
| CN113346341A (en) * | 2021-05-18 | 2021-09-03 | 西北大学 | All-positive-dispersion femtosecond fiber laser based on biased NALM mode locking |
| CN113594839A (en) * | 2021-08-06 | 2021-11-02 | 深圳市杰普特光电股份有限公司 | Optical fiber oscillator |
| CN113690725A (en) * | 2021-09-15 | 2021-11-23 | 哈尔滨工业大学 | Holmium-doped polarization maintaining fiber femtosecond laser of bidirectional cascade pump |
| CN113686366A (en) * | 2021-07-30 | 2021-11-23 | 南方科技大学 | Optical frequency domain reflectometer device based on Fourier domain mode locking and measuring method |
| CN115133389A (en) * | 2022-06-28 | 2022-09-30 | 广东大湾区空天信息研究院 | Solid laser based on nonlinear amplification annular mirror |
| CN116565678A (en) * | 2023-07-10 | 2023-08-08 | 北京凯普林光电科技股份有限公司 | Laser device |
| CN117578173A (en) * | 2023-10-27 | 2024-02-20 | 北京大学长三角光电科学研究院 | Full polarization-maintaining O-shaped ultrashort pulse mode-locked fiber laser |
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| CN111969401B (en) * | 2020-08-31 | 2021-08-17 | 中国科学院合肥物质科学研究院 | Pulse energy increasing method of self-starting Figure-9 passive mode-locking optical fiber laser |
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| CN113206430A (en) * | 2021-03-30 | 2021-08-03 | 华南师范大学 | Phase shifter, mode-locked laser and control method of mode-locked laser |
| CN113206426B (en) * | 2021-04-28 | 2022-05-03 | 中国人民解放军国防科技大学 | Compact high-repetition-frequency full-polarization-maintaining optical fiber mode-locked laser |
| CN113206426A (en) * | 2021-04-28 | 2021-08-03 | 中国人民解放军国防科技大学 | Compact high-repetition-frequency full-polarization-maintaining optical fiber mode-locked laser |
| CN113346341A (en) * | 2021-05-18 | 2021-09-03 | 西北大学 | All-positive-dispersion femtosecond fiber laser based on biased NALM mode locking |
| CN113686366A (en) * | 2021-07-30 | 2021-11-23 | 南方科技大学 | Optical frequency domain reflectometer device based on Fourier domain mode locking and measuring method |
| CN113686366B (en) * | 2021-07-30 | 2023-10-20 | 南方科技大学 | Optical frequency domain reflectometer device based on Fourier domain mode locking and measuring method |
| CN113594839A (en) * | 2021-08-06 | 2021-11-02 | 深圳市杰普特光电股份有限公司 | Optical fiber oscillator |
| CN113690725A (en) * | 2021-09-15 | 2021-11-23 | 哈尔滨工业大学 | Holmium-doped polarization maintaining fiber femtosecond laser of bidirectional cascade pump |
| CN115133389A (en) * | 2022-06-28 | 2022-09-30 | 广东大湾区空天信息研究院 | Solid laser based on nonlinear amplification annular mirror |
| CN115133389B (en) * | 2022-06-28 | 2023-08-04 | 广东大湾区空天信息研究院 | Solid laser based on nonlinear amplifying annular mirror |
| WO2024001392A1 (en) * | 2022-06-28 | 2024-01-04 | 广东大湾区空天信息研究院 | Solid-state laser based on nonlinear amplifying loop mirror |
| CN116565678A (en) * | 2023-07-10 | 2023-08-08 | 北京凯普林光电科技股份有限公司 | Laser device |
| CN116565678B (en) * | 2023-07-10 | 2023-10-03 | 北京凯普林光电科技股份有限公司 | Laser device |
| CN117578173A (en) * | 2023-10-27 | 2024-02-20 | 北京大学长三角光电科学研究院 | Full polarization-maintaining O-shaped ultrashort pulse mode-locked fiber laser |
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