CN109256669A - A kind of laser with the output of Gao Zhongying polarization switch pulse train - Google Patents
A kind of laser with the output of Gao Zhongying polarization switch pulse train Download PDFInfo
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- CN109256669A CN109256669A CN201811339681.9A CN201811339681A CN109256669A CN 109256669 A CN109256669 A CN 109256669A CN 201811339681 A CN201811339681 A CN 201811339681A CN 109256669 A CN109256669 A CN 109256669A
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- dichroscope
- splitting prism
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- polarization splitting
- laser
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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
- H01S3/1112—Passive mode locking
- H01S3/1115—Passive mode locking using intracavity saturable absorbers
-
- 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
- H01S3/06708—Constructional details of the fibre, e.g. compositions, cross-section, shape or tapering
- H01S3/06716—Fibre compositions or doping with active elements
-
- 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
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
Abstract
The invention discloses a kind of lasers with the output of Gao Zhongying polarization switch pulse train, laser resonator system includes crystal optical fibre, bloomed lens group I, bloomed lens group II, dichroscope I, dichroscope II, dichroscope III and polarization splitting prism I, III group of dichroscope I, dichroscope II, polarization splitting prism I and dichroscope rectangular circulation light road chamber, dichroscope I, dichroscope II, polarization splitting prism I and dichroscope III are respectively at four apexes of rectangle and are arranged successively clockwise；Laser control system includes dichroscope IV, polarization splitting prism II, and dichroscope IV and polarization splitting prism I and dichroscope II are in same optical path, and receives the polarised light of the output of polarization splitting prism I and be reflected to polarization splitting prism II；The present invention realizes the Gao Zhongying polarization switch pulse train output alternately converted comprising two kinds of polarization state time domain periodics for the first time.
Description
Technical field
The present invention relates to a kind of laser, specifically a kind of laser with the output of Gao Zhongying polarization switch pulse train
Device.
Background technique
Polarization multiplexing is the signal being multiplexed on electromagnetic wave on physical layer, it allows on same carrier wave, and there are two letters
Road indicates with two orthogonal polarization states respectively, thus can double transmission information.Therefore, realize that this technology just needs
The periodical output of two orthogonal polarisation states.It, can be with by traditional mode-locking technique in optical fiber laser and solid state laser
Scalar soliton pulse is generated, each pulse polarization state having the same under this kind of orphan or be S-polarization state laser,
All it is P polarization state laser or is other single polarization states.Traditional mode-locking technique also can produce vector soliton pulse,
Different from scalar orphan, vector orphan has S-polarization and the two different polarization states of P polarization.However the two polarization states when
Between on be overlapped, have strong energy exchange between S-polarization state laser and P polarization state laser, be easy to cause crosstalk.
The laser of existing some pulse train outputs for generating periodical S-polarization state laser and P polarization state laser is ground
In studying carefully, repetition rate is exported generally in MHz magnitude.For this purpose, there is research that extremely short ordinary optic fibre is selected to make gain media, foundation
F=c/ (L*n), f is pulse recurrence frequency in formula, and c is light velocity 3*10 in vacuum8M/s, L are that practical chamber is long, and the length of optical fiber is got over
Short, chamber length is shorter, then the repetition rate of obtained pulse is higher.But for ordinary optic fibre, fiber lengths are shorter, this
The gain of light of body is also smaller accordingly, is also difficult to reach the threshold value of mode locking, to be difficult to obtain stable pulse train.Also
Research selects crystal to make gain media, provides enough gains, while the repetition rate of pulse can be improved, but because a part
The polarization characteristic of crystal cannot achieve nonlinear polarization rotation；Some crystal cannot achieve because this body length is very short
The nonlinear polarization rotation in full period, can not be applied to polarization multiplexing.It is able to achieve there is presently no a kind of laser and includes
The Gao Zhongying polarization switch pulse train output that two kinds of polarization state time domain periodics are alternately converted.
Summary of the invention
In view of the above existing problems in the prior art, the present invention provides one kind to have Gao Zhongying polarization switch pulse train defeated
Laser out can effectively improve the pulse recurrence frequency of output laser, while to the luminous intensity of two kinds of polarised lights of output reality
It is now continuously adjusted, and mutually indepedent propagation.
To achieve the goals above, the technical solution adopted by the present invention is that: one kind have Gao Zhongying polarization switch pulse sequence
The laser of output, including laser resonator system and laser control system are arranged,
The laser resonator system includes pumping source, crystal optical fibre, optical path constraint device and mode-locking device, optical path constrainer
Part includes bloomed lens group I, bloomed lens group II, dichroscope I, dichroscope II, dichroscope III and polarization splitting prism
I, III group of dichroscope I, dichroscope II, polarization splitting prism I and dichroscope rectangular circulation light road chamber, dichroscope I,
Dichroscope II, polarization splitting prism I and dichroscope III are respectively at four apexes of rectangle and are arranged successively clockwise；
Pumping source and dichroscope I and dichroscope II are on same collimated light path, and the light that pumping source issues is saturating by plated film
Microscope group I is transferred to dichroscope I；Crystal optical fibre is on the collimated light path between dichroscope I and dichroscope II, dichroic
Collimated light path between mirror II and polarization splitting prism I is equipped with bloomed lens I, between dichroscope I and dichroscope III
Collimated light path is equipped with bloomed lens II；Mode-locking device and polarization splitting prism I and dichroscope III are in same collimated light path
On, and mode-locking device receives the polarised light that polarization splitting prism I exports in the optical path；Bloomed lens group II be in mode-locking device with
On collimated light path between polarization splitting prism I；
The laser control system includes dichroscope IV, polarization splitting prism II, high reflection mirror I and high reflection mirror II,
Dichroscope IV and polarization splitting prism I and dichroscope II are on same collimated light path, and dichroscope IV receives the light
The polarised light of the output of road polarization splitting prism I is simultaneously reflected to polarization splitting prism II；High reflection mirror I and polarization splitting prism II
It is on same collimated light path with dichroscope IV, and the polarization that high reflection mirror I exports polarization splitting prism II in the optical path
Light is reflected；High reflection mirror II is on another collimated light path of polarization splitting prism II, and high reflection mirror II is to the optical path
The polarised light that upper polarization splitting prism II exports is reflected；Collimated light between high reflection mirror I and polarization splitting prism II
Road is equipped with the wave plate I of angle rotatable, and being equipped on the collimated light path between high reflection mirror II and polarization splitting prism II can
Rotate the wave plate II of angle.
Further, the crystal optical fibre is high-concentration dopant rare earth ion and the crystal with fibre core and clad waveguides structure
Optical fiber.
Further, the doped dielectric of the crystal optical fibre is Tm3+Or Tm3+、Ho3+The rare earth ion being co-doped with, crystal optical fibre
The cutting of both ends oblique angle, tilt angle are greater than 8 degree or are coated with 2 mum lasers in the anti-reflection film of 1800nm-2150nm wave-length coverage；
Crystal optical fibre is by the crystal (such as yttrium-aluminium-garnet (Y with cubic system3Al5O12, YAG)) or other crystallographic systems from c to cutting
Crystal draw, length is in centimetres.
Further, the bloomed lens group I and the plano-concave lens group staggered relatively by two concave surfaces of bloomed lens group II
At；The front and rear surfaces of bloomed lens group I and II are coated with anti-reflection film, and wherein the anti-reflection range of bloomed lens group I is 700-
900nm, the saturating range of bloomed lens group II are 1800-2150nm；The wave plate I and wave plate II are quarter-wave plate；Institute
It states high reflection mirror I and high reflection mirror II is the plane high reflection mirror of 2 micron wavebands plating highly reflecting films, reflectivity is greater than
99.6%.
Further, the mode-locking device specially has the no polarization selectivity of 1800-2150nm wave band in the wave band
There are the semiconductor or two-dimensional material of saturable absorption effect, service band 1800-2150nm, modulation depth 18%-26%,
Saturation pulse flux is 70-130 μ J/cm2。
Compared with existing solid mode-locked laser, the present invention is big using crystal optical fibre gain, mode locking easy to accomplish；Simultaneously
Crystal optical fibre used have waveguiding structure, good beam quality, waveguiding structure generate high-throughput light beam it is easy to accomplish it is non-linear partially
Vibration rotation solves solid mode-locked laser difficulty mode locking, difficult resonance problems.Compared with common optical fiber mode locked laser, normal light
The fine usual fiber lengths of mode-locked laser are rice magnitude, pulse recurrence frequency MHz.Using crystal optical fibre, chamber length can be foreshortened to
Centimetres, repetition is up to GHz.In practical application, the present invention realizes the output of Gao Zhongying polarization switch pulse train, the pulse
Each polarized component (i.e. S-polarization state laser and P polarization state laser) independent propagation in sequence, can be continuous by the angle of rotating wave plate
Adjust the S-polarization state laser of output and the intensity contrast of P polarization state laser；When being applied to communication channel, due to two pulse sequences
Column do not interact, and reduce signal cross-talk probability, improve the reliability of optic communication.Further, since using crystal optical fibre
Available is more than the high repetition frequency of GHz, which can be used as the carrier source of novel polarization multiplexing, improve the letter of optic communication
Cease capacity.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the initial optical path transmission figure of laser resonator system in the present invention；
Fig. 3 is the optic path figure after S-polarization state laser is reflected by mode-locking device in Fig. 2；
Fig. 4 is the optic path figure after P polarization state laser is reflected by mode-locking device in Fig. 3；
Fig. 5 is the operation schematic diagram of laser control system in the present invention；
Fig. 6 is the pulse train schematic diagram of S-polarization state laser and P polarization state laser；
Fig. 7 is the spectral schematic that laser is exported in the present invention；
Fig. 8 is the preparation flow figure of crystal optical fibre in the present invention.
In figure: 1, pumping source, 2, bloomed lens group I, 3, dichroscope I, 4, crystal optical fibre, 5, dichroscope II, 6, plating
Film lens I, 7, polarization splitting prism I, 8, dichroscope III, 9, bloomed lens II, 10, bloomed lens group II, 11, mode locker
Part, 12, dichroscope IV, 13, polarization splitting prism II, 14, high reflection mirror II, 15, wave plate II, 16, high reflection mirror I, 17, wave
Piece I.
Specific embodiment
The present invention will be further described below.
As shown, the present invention includes laser resonator system and laser control system,
The laser resonator system includes pumping source 1, crystal optical fibre 4, bloomed lens group I 2, bloomed lens group II 10, two
To Look mirror I 3, dichroscope II 5, dichroscope III 8, polarization splitting prism I 7 and mode-locking device 11, dichroscope I 3, dichroic
III 8 groups of mirror II 5, polarization splitting prism I 7 (i.e. PBS) and dichroscope rectangular circulation light road chambers, dichroscope I 3, dichroic
Mirror II 5, polarization splitting prism I 7 and dichroscope III 8 are respectively at four apexes of rectangle and are arranged successively clockwise；Pump
Pu source 1 and dichroscope I 3 and dichroscope II 5 are on same collimated light path, and the light source that pumping source 1 issues passes through plating
Film lens group I 2 is transferred to dichroscope I 3；Crystal optical fibre 4 is in the collimated light path between dichroscope I 3 and dichroscope II 5
On, collimated light path between dichroscope II 5 and polarization splitting prism I 7 is equipped with bloomed lens I 6, dichroscope I 3 and two to
Collimated light path between Look mirror III 8 is equipped with bloomed lens II 9；Mode-locking device 11 and polarization splitting prism I 7 and dichroscope III
8 on same collimated light path, and mode-locking device 11 receives the polarised light that polarization splitting prism I 7 exports in the optical path；Plated film is saturating
Microscope group II 10 is on the collimated light path between mode-locking device 11 and polarization splitting prism I 7；
The laser control system includes dichroscope IV 12, polarization splitting prism II 13, high reflection mirror I 16 and high reflection
Mirror II 14, dichroscope IV 12 and polarization splitting prism I 13 and dichroscope II 5 are on same collimated light path, and dichroic
Mirror IV 12 receives the polarised light that polarization splitting prism I 7 exports in the optical path and is reflected to polarization splitting prism II 13；High reflection mirror
I 16 are on same collimated light path with polarization splitting prism II 13 and dichroscope IV 12, and in I 16 pairs of optical paths of high reflection mirror
The polarised light that polarization splitting prism II 13 exports is reflected；High reflection mirror II 14 is in another standard of polarization splitting prism II 13
In straight light path, and the polarised light that polarization splitting prism II 13 exports in II 15 pairs of optical paths of high reflection mirror reflects；High anti-
The collimated light path penetrated between mirror I 16 and polarization splitting prism II 13 is equipped with the wave plate I 17 of angle rotatable, in high reflection mirror II
Collimated light path between 14 and polarization splitting prism II 13 is equipped with the wave plate II 15 of angle rotatable.
Further, the crystal optical fibre 4 is high-concentration dopant and the crystal with fibre core and clad waveguides structure, the crystalline substance
The doped dielectric of body optical fiber 4 is Tm3+Or Tm3+、Ho3+The both ends oblique angle cutting of the rare earth ion being co-doped with, crystal optical fibre 4 is greater than 8 degree
Or it is coated with the anti-reflection film that 2 mum laser wavelength are 1800nm-2150nm；Crystal optical fibre 4 from cubic system crystal or c to
The crystal of other crystallographic systems of cutting is drawn, and length is in centimetres.This structure can provide enough gains of light and non-thread
Property polarization rotation, realize Gao Zhongying S-polarization and P polarization checker laser output；This is the effect that ordinary optic fibre is difficult to realize
Fruit.Meanwhile if Gao Zhongying polarization switch effect of the present invention can not be reached by increasing crystal length merely, the reason is that real
This existing effect, it is desirable that crystal must be isotropic body；Therefore it needs to cut other crystallographic systems using cubic system or c-.
Further, the anti-reflection range of the bloomed lens group I 2 is 700-900nm；The anti-reflection range of bloomed lens group II 10 is
The plating anti-reflection film lens of 1800-2150nm form；The bloomed lens I 6 and bloomed lens II 9 are 2 microns of bloomed lens；Institute
Stating wave plate I 17 and wave plate II 15 is quarter-wave plate；The high reflection mirror I 16 and high reflection mirror II 14 are 2 microns of platings
Membrane plane high reflection mirror.
Further, the mode-locking device 11 is that the two-dimensional material with saturable absorption effect (such as inhale by semiconductor saturable
Acceptor or black phosphorus, graphene or carbon nanotube etc.), typical model SAM-2000-18-10ps used in experiment；Service band
Central wavelength is 2000nm, and modulation depth 26%, saturation pulse flux is 130 μ J/cm2。
The above-mentioned each dichroscope used is the light height of 793nm to wavelength for the light high reflection for being 2000nm to wavelength
Transmission.
The preparation process of above-mentioned crystal optical fibre 4 is as follows: step 1: preparing source rod: will be mixed with the powdered of rare earth ion holmium
Crystal is pressed into spillikin；Step 2: feeding heating: source rod being placed in vertically on a feed device, heats shape to its top
At melting zone, there are many heating methods, and the present invention uses laser heating method；Step 3: Traction: after melting zone is formed, from
Being put into seed crystal and lifting upwards under above, pulls out crystal optical fibre 4.
When work, 1 launch wavelength of pumping source is the pump light of 793nm, and pump light is through I 2 collimation focusing of bloomed lens group, edge
Collimated light path is transmitted through after dichroscope I 3, and into crystal optical fibre 4, it is same that pump light obtains enough gains in crystal optical fibre 4
When generate polarization rotation effect, S-polarization state laser and P polarization state laser, subsequent S-polarization state are finally exported from crystal optical fibre 4
Laser and P polarization state laser reach dichroscope II 5 along collimated light path, inclined through II 5 pairs of S-polarization state laser of dichroscope and P
Polarization state laser is reflected, and is transferred to after so that S-polarization state laser and P polarization state laser is passed through II 9 collimation focusing of bloomed lens
Polarization splitting prism I 7, due to polarization splitting prism I 7 pairs of P polarization state laser transmission, and to S-polarization state laser reflection, therefore S
After polarization state laser and P polarization state laser enter polarization splitting prism I 7, S-polarization state laser is reflected to by polarization splitting prism I 7
Mode-locking device 11, P polarization state laser transmitted through polarization splitting prism I 7 and enter laser control system along collimated light path；
Along the pulse train of original optical path reflection S-polarization state laser after the reception S-polarization state laser of mode-locking device 11, by plated film
Enter polarization splitting prism I 7 after the focusing of lens group II 10, polarization splitting prism I 7 is anti-by the pulse train of S-polarization state laser
It penetrates to dichroscope II 5, enters crystal optical fibre 4 after the reflection of dichroscope II 5, the pulse train of S-polarization state laser is in crystalline substance
The pulse train of P polarization state laser is inspired under birefringence effect and the Cross-phase Modulation effect of body optical fiber 4, S-polarization state swashs
Enter polarization splitting prism I after the reflection that the pulse train of light and P polarization state laser passes through dichroscope I 3 and dichroscope III 8
7, P polarization state laser is along collimated light path transmitted through being transferred to mode-locking device 11, polarization splitting prism I after polarization splitting prism I 7
7 by S-polarization state laser reflection to laser control system；(i.e. the pulse train of the S-polarization state laser of the transmitting of mode-locking device 11 is in square
The shape circulation intracavitary left-hand circular of optical path is output to laser control system after a week)
Along the pulse train of original optical path transmitting P polarization state laser after the reception P polarization state laser of mode-locking device 11, by plated film
Enter polarization splitting prism I 7 after the focusing of lens group II 10, the pulse train of P polarization state laser is transmitted through polarization splitting prism I
7 and it is transferred to dichroscope III 8 along the collimated light path, dichroscope III 8 and dichroscope I 3 are successively to P polarization state laser
After pulse train is reflected, crystal optical fibre 4 is made it into, the pulse train of P polarization state laser is in the birefringent of crystal optical fibre 4
The pulse train of S-polarization state laser, S-polarization state laser and P polarization state laser are inspired under effect and Cross-phase Modulation effect
Pulse train reflected by dichroscope II 5 after enter polarization splitting prism I 7, S-polarization state laser enters polarization splitting prism
I 7 back reflections enter laser control transmitted through polarization splitting prism I 7 and along collimated light path to mode-locking device 11, P polarization state laser
System processed；(i.e. the pulse train of the P polarization state laser of the transmitting of mode-locking device 11 recycles the intracavitary right-hand circular one of optical path in rectangle
Laser control system is output to after week), two kinds of polarised lights operate simultaneously in rectangle circulation optical path chamber, when due to two kinds of polarised lights
Between interval and total cavity length matching, this drive manner makes two kinds of polarization states mutually indepedent, and resistance to crosstalk ability is strong.
Into in laser control system P polarization state laser or S-polarization state laser by dichroscope IV 12 reflect it is laggard
Enter polarization splitting prism II 13；
If S-polarization state laser, S-polarization state laser is reflected to high reflection mirror II 14 by polarization splitting prism II 13, rotation
The angle of wave plate II 15 is adjusted until stopping when the S-polarization state laser passed through can be completely converted into P polarization state laser, the position
The laser of largest light intensity can be exported；S-polarization state laser is reflected by high reflection mirror II 14 and wave plate II 15 is converted into P polarization state and swashs
Light, P polarization state laser are exported along collimated light path transmitted through polarization splitting prism II 13；
If P polarization state laser, P polarization state laser is along collimated light path transmitted through being transferred to height after polarization splitting prism II 13
Reflecting mirror I 16, similarly the angle of rotation adjustment wave plate I 17 is until S-polarization state can be completely converted by the P polarization state laser passed through
Laser stops, which can export the laser of largest light intensity；P polarization state laser is by the reflection of high reflection mirror I 16 and I 17 turns of wave plate
Change S-polarization state laser into, S-polarization state laser is exported after being reflected by polarization splitting prism II 13.
S-polarization state laser and P polarization state laser can be made to turn completely if the rotation angle of wave plate I 17 and wave plate II 15 is not at
The position changed, in this case, S-polarization state laser and P polarization state laser through polarization splitting prism II 13 show as part reflection and
Transmission, i.e., a part of light output, a part of light, which is reflected back in laser resonator system, continues resonance, shows as S-polarization under this state
State laser and the non-largest light intensity output of P polarization state laser.It by bandwidth is 1GHz in experiment, the oscillograph of 20GS/s cooperates 2 microns
InGaAs high speed optoelectronic probe measures, as shown in fig. 7, corresponding output intensity size can be calculated by Malus' law:
Iout=Iin*cos2α
I in formulaoutFor output intensity, IinTo input light intensity, α is that light polarization rotates angle.Spectrogram is by Yokogawa
Measured by AQ63751200-2400 μm of spectrometer.System passes through following process before reaching Gao Zhongying polarization switch pulse output:
Not up to modelocking threshold when, no pulse sequence in time domain, is spectrally one or several narrow peak, and with Mode-hopping Phenomena, work as pump
Pu power increases to modelocking threshold, occurs equal strength amplitude in time domain at this time, the pulse train of constant duration, spectrally narrow
Peak broadening, central wavelength position locking, also it can be seen that Kelly sideband, is tested with autocorrelation function analyzer considerable at this time under anomalous dispersion
Observe stable second harmonic signal.As shown in Figure 6,7, the pulse spacing that S-polarization state laser and P polarization state laser export simultaneously
T matches with light in the time (it is long to depend on design chamber in practice) that resonant cavity walks one week, and S-polarization state laser and P polarization state swash
The pulse spacing that light independently exports is twice of above-mentioned pulse spacing.Therefore, S-polarization state laser and P polarization state laser are defeated simultaneously
When out, overall effect is shown as repetition and doubles to export.
Claims (5)
1. a kind of laser with the output of Gao Zhongying polarization switch pulse train, which is characterized in that including laser resonator system
And laser control system,
The laser resonator system includes that pumping source, crystal optical fibre, optical path constraint device and mode-locking device, optical path constrain device packet
Include bloomed lens group I, bloomed lens group II, dichroscope I, dichroscope II, dichroscope III and polarization splitting prism I, two
To III group of Look mirror I, dichroscope II, polarization splitting prism I and dichroscope rectangular circulation light road chamber, dichroscope I, two to
Look mirror II, polarization splitting prism I and dichroscope III are respectively at four apexes of rectangle and are arranged successively clockwise；Pumping
Source and dichroscope I and dichroscope II are on same collimated light path, and the light source that pumping source issues passes through bloomed lens
Group I is transferred to dichroscope I；Crystal optical fibre is on the collimated light path between dichroscope I and dichroscope II, dichroscope
Collimated light path between II and polarization splitting prism I is equipped with bloomed lens I, the standard between dichroscope I and dichroscope III
Straight light path is equipped with bloomed lens II；Mode-locking device and polarization splitting prism I and dichroscope III are on same collimated light path,
And mode-locking device receives the polarised light that polarization splitting prism I exports in the optical path；Bloomed lens group II be in mode-locking device and partially
On collimated light path between vibration Amici prism I；
The laser control system includes dichroscope IV, polarization splitting prism II, high reflection mirror I and high reflection mirror II, two to
Look mirror IV and polarization splitting prism I and dichroscope II are on same collimated light path, and dichroscope IV receives in the optical path
The polarised light of the output of polarization splitting prism I is simultaneously reflected to polarization splitting prism II；High reflection mirror I and polarization splitting prism II and two
Be on same collimated light path to Look mirror IV, and high reflection mirror I in the optical path polarization splitting prism II export polarised light into
Row reflection；High reflection mirror II is on another collimated light path of polarization splitting prism II, and high reflection mirror II is to inclined in the optical path
The polarised light that vibration Amici prism II exports is reflected；On collimated light path between high reflection mirror I and polarization splitting prism II
Wave plate I equipped with angle rotatable is equipped on the collimated light path between high reflection mirror II and polarization splitting prism II rotatable
The wave plate II of angle.
2. a kind of laser with the output of Gao Zhongying polarization switch pulse train according to claim 1, feature exist
In the crystal optical fibre is crystal optical fibre rare earth doped and with fibre core and clad waveguides structure.
3. a kind of laser with the output of Gao Zhongying polarization switch pulse train according to claim 2, feature exist
In the active ions of the crystal optical fibre doping are Tm3+Or Tm3+、Ho3+The rare earth ion being co-doped with, the both ends of crystal optical fibre are oblique
Angle cutting, tilt angle are greater than 8 degree or are coated with 2 mum lasers in the anti-reflection film of 1800nm-2150nm wave-length coverage；Crystal light
Fibre by with cubic system crystal or c draw to the crystal of other crystallographic systems of cutting, length is in centimetres.
4. a kind of laser with the output of Gao Zhongying polarization switch pulse train according to claim 1, feature exist
In the bloomed lens group I and bloomed lens group II are made of two concave surface plano-concave lens staggered relatively；The plated film is saturating
The front and rear surfaces of microscope group I and II are coated with anti-reflection film, and wherein the anti-reflection range of bloomed lens group I is 700-900nm, bloomed lens group
II saturating range is 1800-2150nm；The wave plate I and wave plate II are quarter-wave plate；The high reflection mirror I and height are anti-
The plane high reflection mirror that mirror II is 2 micron wavebands plating highly reflecting films is penetrated, reflectivity is greater than 99.6%.
5. a kind of laser with the output of Gao Zhongying polarization switch pulse train according to claim 1, feature exist
In the mode-locking device specially has saturable absorption in the wave band to the no polarization selectivity of 1800-2150nm wave band
The semiconductor or two-dimensional material of effect, service band 1800-2150nm, modulation depth 18%-26%, saturation pulse flux
For 70-130 μ J/cm2。
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Cited By (1)
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| CN116417890A (en) * | 2023-06-06 | 2023-07-11 | 武汉中科锐择光电科技有限公司 | Device for generating ultrashort pulse based on polarization cycle replacement optical fiber passive resonant cavity |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116417890B (en) * | 2023-06-06 | 2023-08-22 | 武汉中科锐择光电科技有限公司 | Device for generating ultrashort pulse based on polarization cycle replacement optical fiber passive resonant cavity |
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