CN107732638A - Based on full polarization fine optical frequency carding device and locked mode locking method - Google Patents
Based on full polarization fine optical frequency carding device and locked mode locking method Download PDFInfo
- Publication number
- CN107732638A CN107732638A CN201710985094.6A CN201710985094A CN107732638A CN 107732638 A CN107732638 A CN 107732638A CN 201710985094 A CN201710985094 A CN 201710985094A CN 107732638 A CN107732638 A CN 107732638A
- Authority
- CN
- China
- Prior art keywords
- polarization
- fiber
- pulse
- helical fiber
- interval
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- H01S3/06712—Polarising fibre; Polariser
-
- 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
- H01S3/06704—Housings; Packages
-
- 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
- H01S3/106—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity
- H01S3/108—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating by controlling devices placed within the cavity using non-linear optical devices, e.g. exhibiting Brillouin or Raman scattering
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Nonlinear Science (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
- Lasers (AREA)
Abstract
The present invention relates to a kind of the optical frequency carding device and locked mode locking method fine based on full polarization, realizes that mode locking pulse produces by nonlinear polarization rotation of the pulse in Helical Fiber.Pass through the repetition rate of mechanical means or optical means locking device.The carrier wave position phase zero frequency signal of pulse is obtained by full polarization fiber amplifier, polarization-maintaining nonlinear optical fiber, and PPLN crystal；By carrier wave position phase zero frequency signal by feeding back to output control device in device after processing of circuit, or cavity loss control device is fed back to, realize the locking of carrier wave position phase zero frequency signal.Mode-locked laser is built based on full polarization fibre, nonlinear polarization rotation occurs in Helical Fiber for pulse, solves the walk-off effect of pulse by the specific configuration of multistage Helical Fiber.Manufactured full polarization fibre optical frequency carding device has high stability, to temperature fluctuation, mechanical oscillation are insensitive the characteristics of.
Description
Technical field
The present invention relates to a kind of laser technology, more particularly to a kind of the optical frequency carding device and lock fine based on full polarization
Mold lock frequency method.
Background technology
Optical frequency com has very important answer on accurate spectral measurement, Time and frequency standard, absolute distance measurement
With.At present, the key components of optical frequency com are ultrashort pulse laser oscillators.The arteries and veins of the ultrashort pulse laser oscillator
Rush the factors such as locked mode principle, light channel structure has vital influence to the performance of light comb.
At present, based on the optical frequency com of optical fiber structure in stability and practicality compared to the light of solid state gain medium
Comb has significant advantage, and such as flexible waveguiding structure light path, lightweight is easy of integration, heat dispersion is good.Optical fiber light comb is led to
Frequently with two class locked mode modes.Wherein, the first kind is using saturable absorber in kind, such as semiconductor saturable absorbing mirror, stone
Black alkene, CNT etc. have the material of non-linear absorption properties；Second class uses virtual saturable absorber, such as non-linear
Polarize rotation, nonlinear interference annular mirror, the nonlinear pulse side of narrowing with non-physical such as the nonlinear interference annular mirrors amplified
Method.
In addition, polarization maintaining optical fibre is birefringent because Inner is grasped to have the disturber's mask transmitted in isolation external environment to laser
There is significant advantage, can be disturbed with environment resistant, the stability of transmission signal is strong.It is light comb skill based on the fine optical fiber light comb of full polarization
Art moves towards unique effective way of client.Currently, the existing some reports of light comb based on first kind material object saturable absorber；
Based on the virtual saturable absorber of the second class (nonlinear interference annular mirror or nonlinear interference annular mirror) with amplification in the recent period
There is part report.But based on the virtual saturable absorber of the second class (nonlinear polarization rotation) only in common non PM fiber
In realized the optical fiber light comb based on polarization maintaining optical fibre nonlinear polarization rotation not yet occur.
Nonlinear polarization rotation locked mode is realized by two polarized components Cross-phase Modulation in a fiber of pulse
Polarization rotation.And single-mode fiber can be seen as almost grasping birefringent optical fiber without Inner, its any two is orthogonal partially
The direction that shakes there's almost no group velocity difference.Therefore, the orthogonal polarized component of any two can keep foot in single-mode fiber
Enough time-interleavings, and then enough Nonlinear Cumulatives can be produced by Cross-phase Modulation；Further, since the two polarized components
Overlapping in time preferable, they still can be decomposed and be synthesized on polarization-dependent isolator 108, be realized to intracavitary pulse
Loss control, that is, realize optical kerr effect.
The difficulty that full polarization fibre light comb based on nonlinear polarization rotation locked mode is primarily present is as follows：
Firstth, in general, polarization maintaining optical fibre grasp birefringence in the presence of stronger Inner.When the incident pulse of linear polarization is along polarization-maintaining
When the fast axle of optical fiber or slow axis incidence, its linear polarization can be kept not change；When the incident pulse not edge of linear polarization
Polarization maintaining optical fibre fast axle or slow axis and along other it is any axially incident when, its linear polarization changes generating period, and line is inclined
Shake and be alternately present with elliptical polarization.After pulse transmits certain distance in polarization maintaining optical fibre, due to birefringent presence, fast axle and
Polarized component on slow axis can walk off in time.Cross-phase Modulation can not be produced by walking off rear polarizer component.
Secondth, walking off due to the polarized component in fast axle and slow axis, pulse division can be produced.Pulse after division can not
Synthesized or decomposed on polarization-dependent isolator 108, i.e., can not realize the loss control to intracavitary pulse.
3rd, the presence due to thermally induced birefringence, i.e. optical fiber fast axle and slow axis change caused roll over for environment temperature
Penetrate rate variable quantity difference, i.e., the difference that temperature change refractive index influences.Thermally induced birefringence can significantly impact pulse in optical fiber
Linear processes phase delay in fast axle and slow axis, and then influence the stability of laser transmission.
The content of the invention
The problem of existing the present invention be directed to polarization maintaining optical fibre applied to optical fiber light comb, it is proposed that one kind is fine based on full polarization
Optical frequency carding device and locked mode locking method, mode-locked laser is built based on full polarization fibre, pulse is in Helical Fiber
Generation nonlinear polarization rotation, solves the walk-off effect of pulse by the specific configuration of multistage Helical Fiber.
The technical scheme is that：A kind of optical frequency carding device fine based on full polarization, by full polarization it is fine and
Polarization-preserving optical fibre device is formed, and the first pumping source output light is circulated by being used as the acousto-optic modulator of output control device into optical fiber
Link, light pass sequentially through the first wavelength division multiplexer, the first gain fibre, output coupler, loss control in optical fiber circulation link
Device, Helical Fiber, polarization-dependent isolator and repetition rate locking device, return to the first wavelength division multiplexer, increase by first
Beneficial optical fiber, to output coupler, exported from the output port of output coupler；
The Helical Fiber is formed by connecting by identical first Helical Fiber and the second Helical Fiber, Helical Fiber by
Formed successively between three sections of different index regions, first interval is section, second interval are variable refractivity section, the 3rd without spin
Section is uniform pitch section；Linearly polarized light is incident from the section without spin of the first Helical Fiber, the change refraction of the first Helical Fiber
The elliptically polarized light of rate section outgoing enters the variable refractivity section of the second Helical Fiber, from the area without spin of the second Helical Fiber
Between be emitted linearly polarized light, produce mode locking pulse.
The polarization transmission direction of the polarization-dependent isolator and the first Helical Fiber first interval input incident light are inclined
The direction that shakes is vertical.
The repetition rate locking device is automatically controlled piezoelectric ceramics, either electrooptic modulator or by the second pump light,
The non-linear pumping index modulation device of second wavelength division multiplexer and the second gain fibre composition, or above-mentioned piezoelectricity
Any two kinds of combinations composition of ceramic, non-linear pumping index modulation device, three kinds of electrooptic modulator, or three kinds of combinations.
The locked mode locking method of the optical frequency carding device fine based on full polarization, from the output of loss control device
The incident first Helical Fiber first interval of slow axis of the linearly polarized light along the first Helical Fiber, in the first Helical Fiber first interval
Keep linear polarization constant；Pulse enters the first Helical Fiber second interval variable refractivity from the first Helical Fiber first interval
Behind section, elliptical polarization is gradually evolved into, and the ellipse degree of bias is continuously increased, different polarization component produces the phase shift not waited, but two is inclined
Component still retention time of shaking overlaps, and wherein linear phase shift amount isNonlinear phase shift amount isWhen pulse is from the first spiral shell
Optically-active fibre second interval enters the first Helical Fiber 3rd interval uniform pitch section, because the fast axle and slow axis of 3rd interval are rolled over
It is equal to penetrate rate, its linear phase shiftAgain because two polarized component times overlapped, nonlinear phase shift be presentWork as pulse
It is still oval pulse after the 3rd interval of the first Helical Fiber enters the second Helical Fiber 3rd interval uniform pitch section,
Its linear phase shiftAgain because two polarized component times overlapped, nonlinear phase shift be presentWhen pulse is from the second spiral shell
After optically-active fibre 3rd interval enters the second Helical Fiber second interval variable refractivity section, producing linear phase shift amount is
Nonlinear phase shift amount isBecause the first Helical Fiber and the second Helical Fiber are complete same optical fiber,It is i.e. linear
Phase shift is cancelled out each other；After pulse enters the second Helical Fiber first interval from the second Helical Fiber second interval, pulse from
Elliptical polarization pulse evolution is into linear polarization pulse, and when pulse peak power reaches a certain particular value, i.e., pulse is in the first spiral light
The total nonlinear phase shift accumulated in fine and the second Helical FiberWhen reaching π, now,
The polarization state of second Helical Fiber first interval output end emergent light is inclined compared to the first Helical Fiber first interval input
Polarization state has turned over 90 degree, i.e. the polarization state of the second Helical Fiber first interval output end outgoing is compared to the first Helical Fiber first
Section input polarization direction is vertical；Passed through again from polarization-dependent isolator, that is, realize the polarization phase regulated and controled by nonlinear effect
Loss is closed, produces mode locking pulse.
The locked mode locking method of the optical frequency carding device fine based on full polarization, repetition rate locking device are electricity
The piezoelectric ceramics of control, one section of optical fiber after polarization-dependent isolator output end is pasted to the side of piezoelectric ceramics, by electroluminescent
Flexible fine setting fiber lengths, and then the geometry cavity length of optical frequency carding device is controlled, realize that repetition rate locks with this.
The locked mode locking method of the optical frequency carding device fine based on full polarization, repetition rate locking device are non-
Linear pump index modulation device, the intensity for changing the second pump light control the nonlinear refractive index of the second gain fibre,
And then the optical cavity length of optical frequency carding device is controlled, realize that repetition rate locks with this.
The locked mode locking method of the optical frequency carding device fine based on full polarization, repetition rate locking device are electricity
Optical modulator, by controlling the refractive index of electro-optic crystal in electrooptic modulator, and then control the optics cavity of optical frequency carding device
It is long, realize that repetition rate locks with this.
The locked mode locking method of the optical frequency carding device fine based on full polarization, amplify by the way that full polarization is fine
Device, polarization-maintaining nonlinear optical fiber, and PPLN crystal obtain pulse carrier wave position phase zero frequency signal, by the zero frequency signal through oversampling circuit at
The first pumping source is fed back to after reason, the acousto-optic modulator of control pump light intensities is either fed back to or feeds back to loss control
Element, realize the locking of carrier wave position phase zero frequency signal.
The beneficial effects of the present invention are：The present invention is based on the fine optical frequency carding device of full polarization and locked mode frequency locking side
Method, manufactured full polarization fibre optical frequency carding device has high stability, insensitive to temperature fluctuation, mechanical oscillation
Feature.
Brief description of the drawings
Fig. 1 is the present invention based on the fine optical frequency com apparatus structure schematic diagram of full polarization；
Fig. 2 is the connected mode schematic diagram of Helical Fiber of the present invention；
Fig. 3 is the first Helical Fiber schematic diagram of the invention；
Fig. 4 is the second Helical Fiber schematic diagram of the invention.
Embodiment
Structural representation as shown in Figure 1 based on the fine optical frequency carding device 100 of full polarization.Whole device is by all risk insurance
Polarisation is fine and polarization-preserving optical fibre device is formed.
Device includes the first pumping source 101, acousto-optic modulator 102, the first wavelength division multiplexer 103, the first gain fibre
104th, output coupler 105, loss control device 106, Helical Fiber 107, polarization-dependent isolator 108, the second pumping source
109th, the second wavelength division multiplexer 110, the second gain fibre 111, piezoelectric ceramics 112, electrooptic modulator 113 and output port 114.
The output light of first pumping source 101 enters optical fiber circulation link by being used as the acousto-optic modulator 102 of output control device, and light is successively
First wavelength division multiplexer 103, the first gain fibre 104, output coupler 105, loss control device in link are circulated by optical fiber
Part 106, Helical Fiber 107, polarization-dependent isolator 108 and repetition rate locking device, the first wavelength division multiplexer 103 is returned to,
By the first gain fibre 104, to output coupler 105, exported from the output port 114 of output coupler 105.Repetition rate
Locking device is automatically controlled piezoelectric ceramics 112, electrooptic modulator 113, or by the second pump light 109, the second wavelength division multiplexer
110 and the second non-linear pumping index modulation device that forms of gain fibre 111, or electrooptic modulator 113, either
Any two kinds of combinations composition of three, or three kinds of combinations.
Part fiber can be pasted to the side of piezoelectric ceramics 112；Fiber lengths are finely tuned by electrostriction, and then controlled
The geometry cavity length of optical fiber light comb oscillator；Non-linear pumping index modulation technology is in optical frequency carding device fiber link
The second pump light 109, the second wavelength division multiplexer 110 and the second gain fibre 111 are added, by controlling the second pump light
The inverted population of 109 the second gain fibres of strength control 111, the refractive index of the optical fiber is controlled, and then realized to optical fiber light
Comb the control of oscillator optical cavity length；Either by the refractive index of electro-optic crystal in electrooptic modulator 113, and then control optics
The optical cavity length of frequency comb device, realize that repetition rate locks with this.
The connected mode of Helical Fiber 107 therein as shown in Fig. 2 Helical Fiber 107 by identical first spiral light
Fine 107a and the second Helical Fiber 107b are formed by connecting.
First Helical Fiber schematic diagram as shown in Figure 3, the first 107a points of Helical Fiber is between three index regions, the firstth area
Between 107a1 have fixed refractive index for section, slow axis and fast axle without spin, the polarization along fast axle or slow axis incident light can be kept
State；Second interval 107a2 is variable refractivity section, passes through the state of the spin fiber formation spiral under conditions of heating, spiral
Pitch gradually shorten, the refractive index of slow axis and fast axle tends to be equal；3rd interval 107a3 is uniform pitch section, the section light
Fine fast axle and the refractive index of slow axis are equal.
Second Helical Fiber schematic diagram as shown in Figure 4, structure is identical with the first Helical Fiber, only the second spiral
The 3rd interval 107b3 of optical fiber is input, and first interval 107b1 is output end, that is, the 3rd area of the first Helical Fiber
Between 107a3 be connected with the 3rd interval 107b3 of the second Helical Fiber.
The specific method of locked mode is incident first Helical Fiber first of slow axis of the linearly polarized light along the first Helical Fiber 107a
Section 107a1, keep linear polarization constant in the first Helical Fiber first interval 107a1；Pulse is from the first Helical Fiber
After one section 107a1 enters the first Helical Fiber second interval 107a2 variable refractivities section, elliptical polarization is gradually evolved into,
And the ellipse degree of bias is continuously increased, different polarization component produces the phase shift not waited, but the two polarized components still retention time overlaps, its center line
Property phase-shift phase isNonlinear phase shift amount isWhen pulse enters from the first Helical Fiber second interval 107a2
One Helical Fiber 3rd interval 107a3 uniform pitch section, because 3rd interval 107a3 fast axle and slow axis refractive index are equal, its
Linear phase shiftAgain because two polarized component times overlapped, nonlinear phase shift be presentIn order to offset linear phase shift
With accumulation nonlinear phase shift, the first Helical Fiber 3rd interval 107a3 output ends 1072 and the second Helical Fiber 3rd interval
107a3 inputs 1073 are connected.When pulse enters the second Helical Fiber from the 3rd interval 107a3 of the first Helical Fiber
It is still oval pulse behind three sections 107b3 uniform pitch section, its linear phase shiftAgain because two polarized component times handed over
It is folded, nonlinear phase shift be presentWhen pulse enters the second Helical Fiber from the second Helical Fiber 3rd interval 107b3
Behind two sections 107b2 variable refractivities section, producing linear phase shift amount isNonlinear phase shift amount isWherein, due to
First Helical Fiber 107a and the second Helical Fiber 107b is complete same optical fiber,I.e. linear phase shift is cancelled out each other.When
After the second Helical Fiber second interval 107b2 enters the second Helical Fiber first interval 107b1, pulse is inclined from ellipse for pulse
Pulse evolution shake into linear polarization pulse.When pulse peak power reaches a certain particular value, i.e., pulse is in the first Helical Fiber 107a
With the total nonlinear phase shift accumulated in the second Helical Fiber 107bWhen reaching π, this
When, the polarization state of the emergent light of the second Helical Fiber first interval output end 1074 inputs compared to the first Helical Fiber first interval
The polarization state at end 1071 has turned over 90 degree, i.e. the polarization state that the second Helical Fiber first interval output end 1074 is emitted is compared to the
One 1071 polarization directions of Helical Fiber first interval input are vertical.
First Helical Fiber first interval 1071 input as Helical Fiber 107 of input；Second Helical Fiber
Output end of the one section output end 1074 as Helical Fiber 107.
The output end 1074 of second Helical Fiber is connected with the input of polarization-dependent isolator 108, polarizes related isolation
The polarization transmission direction of device 108 is vertical with the incident light polarization direction of the first Helical Fiber first interval input 1071.Work as incidence
When the peak power of pulse is sufficiently strong, from the linearly polarized light of the first Helical Fiber first interval input incidence 1071, by
One Helical Fiber 107a and the second Helical Fiber 107b produces 90 degree of polarization rotation, and is passed through from polarization-dependent isolator 108,
Realize the Polarization Dependent Loss regulated and controled by nonlinear effect.When incident pulse energy is relatively low, can not be produced in Helical Fiber
During enough nonlinear phase shifts, polarization-dependent isolator 108 can not be passed through；Only when incident pulse produced in Helical Fiber it is non-thread
Property phase shift, or occur polarization rotation when, could it is some or all of pass through polarization-dependent isolator 108.
The polarization-dependent isolator 108 can also be to polarize related any optical fiber coupling device, such as polarization beam apparatus,
Beam splitter of single shaft work etc..
Repetition rate locking means can use piezoelectric ceramics 112, or non-linear pumping index modulation technology, or
It is electrooptic modulator 113.Wherein, part fiber can be pasted to the side of piezoelectric ceramics 112；Optical fiber is finely tuned by electrostriction
Length, and then control the geometry cavity length of optical frequency carding device；Non-linear pumping index modulation technology is in optical frequency com
The second pump light 109, the second wavelength division multiplexer 110 and the second gain fibre 111 are added in device fiber link, is passed through
The inverted population of the second gain fibre of strength control 111 of the second pump light 109 is controlled, the refractive index of the optical fiber is controlled, entered
And realize the control to optical frequency carding device optical cavity length；By controlling the refractive index of electro-optic crystal in electrooptic modulator, enter
And the optical cavity length of optical frequency carding device is controlled, it is above-mentioned to realize that repetition rate locking repetition rate locking device can have with this
Piezoelectric ceramics 112, or non-linear pumping index modulation technology, or 113 3 kinds of electrooptic modulator any one,
Two kinds of combination compositions, or three kinds of combinations.
Carrier wave position phase zero-frequency semaphore lock is by full polarization fiber amplifier, polarization-maintaining nonlinear optical fiber, and PPLN crystal
Obtain the carrier wave position phase zero frequency signal of pulse.The zero frequency signal is passed through into processing of circuit, feeds back to the first pumping source 101, or
The acousto-optic modulator 102 of control pump light intensities is fed back to, or feeds back to the loss control element 106 of intracavitary, realizes carrier wave
The locking of position phase zero frequency signal.
The first described gain fibre 104 and the second gain fibre 111 can be Er-doped fiber, Yb dosed optical fiber, mix thulium light
Fine, neodymium-doped fiber；First gain fibre 104 and the optical fiber that the second gain fibre 111 is variety classes doping.
Mode locking pulse based on the fine optical frequency carding device of full polarization produces non-in Helical Fiber by pulse
Linear polarization is rotated to realize.Pass through the repetition rate of mechanical means or optical means locking device.It is fine by full polarization
Amplifier, polarization-maintaining nonlinear optical fiber, and PPLN crystal obtain the carrier wave position phase zero frequency signal of pulse；By carrier wave position phase zero frequency signal
By feeding back to output control device in device after processing of circuit, or cavity loss control device is fed back to, realize carrier wave position
The locking of phase zero frequency signal.
Claims (8)
1. a kind of optical frequency carding device fine based on full polarization, it is characterised in that by full polarization fibre and polarization maintaining optical fibre device
Part form, the first pumping source output light by be used as output control device acousto-optic modulator enter optical fiber circulate link, light according to
It is secondary that first wavelength division multiplexer, the first gain fibre, output coupler, loss control device, spiral in link are circulated by optical fiber
Optical fiber, polarization-dependent isolator and repetition rate locking device, return to the first wavelength division multiplexer, by the first gain fibre, arrive
Output coupler, exported from the output port of output coupler；
The Helical Fiber is formed by connecting by identical first Helical Fiber and the second Helical Fiber, and Helical Fiber is by three sections
Formed successively between different index regions, first interval is section, second interval are variable refractivity section, 3rd interval without spin
For uniform pitch section；Linearly polarized light is incident from the section without spin of the first Helical Fiber, the variable refractivity area of the first Helical Fiber
Between the elliptically polarized light that is emitted enter the variable refractivity section of the second Helical Fiber, go out from the section without spin of the second Helical Fiber
Ray polarised light, produce mode locking pulse.
2. according to claim 1 based on the fine optical frequency carding device of full polarization, it is characterised in that the polarization is related
The polarization transmission direction of isolator is vertical with the first Helical Fiber first interval input incident light polarization direction.
3. according to claim 1 based on the fine optical frequency carding device of full polarization, it is characterised in that the repetition rate
Locking device is automatically controlled piezoelectric ceramics, either electrooptic modulator or by the second pump light, the second wavelength division multiplexer and
The non-linear pumping index modulation device of two gain fibres composition, or above-mentioned piezoelectric ceramics, non-linear pumping refraction
Any two kinds of combinations composition of rate modulating device, three kinds of electrooptic modulator, or three kinds of combinations.
4. the locked mode frequency locking based on the fine optical frequency carding device of full polarization according to any one in claims 1 to 3
Method, it is characterised in that incident first spiral of slow axis of the linearly polarized light exported from loss control device along the first Helical Fiber
Optical fiber first interval, keep linear polarization constant in the first Helical Fiber first interval；Pulse is from the first Helical Fiber first
After section enters the first Helical Fiber second interval variable refractivity section, elliptical polarization is gradually evolved into, and the ellipse degree of bias is continuous
Increase, different polarization component produce the phase shift not waited, but the two polarized components still retention time overlaps, and wherein linear phase shift amount isNonlinear phase shift amount isWhen pulse enters the area of the first Helical Fiber the 3rd from the first Helical Fiber second interval
Between uniform pitch section, because the fast axle and slow axis refractive index of 3rd interval are equal, its linear phase shiftAgain due to two polarizations
The component time overlaps, and nonlinear phase shift be presentWhen pulse enters the second spiral from the 3rd interval of the first Helical Fiber
It is still oval pulse behind optical fiber 3rd interval uniform pitch section, its linear phase shiftAgain because two polarized component times handed over
It is folded, nonlinear phase shift be presentWhen pulse enters the second Helical Fiber second interval from the second Helical Fiber 3rd interval
Behind variable refractivity section, producing linear phase shift amount isNonlinear phase shift amount isDue to the first Helical Fiber and
Two Helical Fibers are complete same optical fiber,I.e. linear phase shift is cancelled out each other；When pulse is from second the secondth area of Helical Fiber
Between enter the second Helical Fiber first interval after, pulse works as peak value of pulse from elliptical polarization pulse evolution into linear polarization pulse
Power reaches a certain particular value, i.e., total nonlinear phase shift that pulse is accumulated in the first Helical Fiber and the second Helical FiberWhen reaching π, now, the second Helical Fiber first interval output end emergent light it is inclined
Polarization state has turned over 90 degree, i.e. the second Helical Fiber first interval compared to the polarization state of the first Helical Fiber first interval input
The polarization state of output end outgoing is vertical compared to the first Helical Fiber first interval input polarization direction；Again from polarization it is related every
Passed through from device, that is, realize the Polarization Dependent Loss regulated and controled by nonlinear effect, produce mode locking pulse.
5. the locked mode locking method according to claim 3 based on the fine optical frequency carding device of full polarization, its feature exist
In repetition rate locking device is automatically controlled piezoelectric ceramics, and one section of optical fiber after polarization-dependent isolator output end is pasted
The side of piezoelectric ceramics, fiber lengths are finely tuned by electrostriction, and then control the geometry cavity length of optical frequency carding device, with this
Realize that repetition rate locks.
6. the locked mode locking method according to claim 3 based on the fine optical frequency carding device of full polarization, its feature exist
In repetition rate locking device is non-linear pumping index modulation device, and the intensity for changing the second pump light controls second
The nonlinear refractive index of gain fibre, and then the optical cavity length of optical frequency carding device is controlled, realize that repetition rate locks with this.
7. the locked mode locking method according to claim 3 based on the fine optical frequency carding device of full polarization, its feature exist
In repetition rate locking device is electrooptic modulator, by controlling the refractive index of electro-optic crystal in electrooptic modulator, and then is controlled
The optical cavity length of optical frequency carding device, realize that repetition rate locks with this.
8. the locked mode locking method according to claim 4 based on the fine optical frequency carding device of full polarization, its feature exist
In, the carrier wave position phase zero frequency signal of pulse is obtained by full polarization fiber amplifier, polarization-maintaining nonlinear optical fiber, and PPLN crystal,
The zero frequency signal is fed back into the first pumping source after processing of circuit, or feeds back to the acousto-optic modulation of control pump light intensities
Device, or loss control element is fed back to, realize the locking of carrier wave position phase zero frequency signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710985094.6A CN107732638B (en) | 2017-10-20 | 2017-10-20 | Optical frequency carding device and mode locking locking method based on full polarization fibre |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710985094.6A CN107732638B (en) | 2017-10-20 | 2017-10-20 | Optical frequency carding device and mode locking locking method based on full polarization fibre |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107732638A true CN107732638A (en) | 2018-02-23 |
| CN107732638B CN107732638B (en) | 2019-06-28 |
Family
ID=61212193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710985094.6A Active CN107732638B (en) | 2017-10-20 | 2017-10-20 | Optical frequency carding device and mode locking locking method based on full polarization fibre |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107732638B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109004501A (en) * | 2018-07-20 | 2018-12-14 | 中国科学院合肥物质科学研究院 | A kind of high stable tunable single longitudinal mode circular cavity optic fibre laser |
| CN109217085A (en) * | 2018-09-06 | 2019-01-15 | 上海理工大学 | A kind of partially ultrafast fiber laser system of all risk insurance of passive full phototiming |
| CN109888602A (en) * | 2019-01-25 | 2019-06-14 | 北京航天计量测试技术研究所 | A kind of all risk insurance mixes ytterbium femtosecond fiber optical frequency com system partially |
| CN111638202A (en) * | 2020-06-04 | 2020-09-08 | 清华大学 | Double-optical-comb coherent anti-Stokes Raman spectrum detection system for localized rapid time-delay scanning |
| CN111725691A (en) * | 2020-06-03 | 2020-09-29 | 华东师范大学 | Thulium-doped optical fiber optical frequency comb system based on nonlinear polarization rotation mode locking |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120205352A1 (en) * | 2011-02-14 | 2012-08-16 | Imra America, Inc. | Compact, coherent, high brightness light sources for the mid and far ir |
| CN104466631A (en) * | 2014-09-30 | 2015-03-25 | 天津理工大学 | Passive mode-locking fiber laser based on nonlinear polarization rotation and compound cavity structure |
| CN205657308U (en) * | 2016-02-22 | 2016-10-19 | 光越科技(深圳)有限公司 | Based on full polarization maintaining fiber mode locking laser source of 8 font cavity configurations |
-
2017
- 2017-10-20 CN CN201710985094.6A patent/CN107732638B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120205352A1 (en) * | 2011-02-14 | 2012-08-16 | Imra America, Inc. | Compact, coherent, high brightness light sources for the mid and far ir |
| CN104466631A (en) * | 2014-09-30 | 2015-03-25 | 天津理工大学 | Passive mode-locking fiber laser based on nonlinear polarization rotation and compound cavity structure |
| CN205657308U (en) * | 2016-02-22 | 2016-10-19 | 光越科技(深圳)有限公司 | Based on full polarization maintaining fiber mode locking laser source of 8 font cavity configurations |
Non-Patent Citations (4)
| Title |
|---|
| ESTHER BAUMANN ET AL: "high-performance, vibration-immune, fiber-laser frequency comb", 《OPTICS LETTERS》 * |
| FENG Y ET AL: "Environmental-adaptability analysis of an all polarization-maintaining fiber-based optical frequency comb", 《OPTICS EXPRESS》 * |
| JAN SZCZEPANEK ET AL: "Ultrafast laser mode-locked using nonlinear polarization evolution in polarization maintaining fibers", 《OPTICS LETTERS》 * |
| QIANG HAO ET AL: "All-optical 20 uHz-level repetition rate stabilization of mode locking with a nonlinear amplifying loop mirror", 《 JOURNAL OF LIGHTWAVE TECHNOLOGY 》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109004501A (en) * | 2018-07-20 | 2018-12-14 | 中国科学院合肥物质科学研究院 | A kind of high stable tunable single longitudinal mode circular cavity optic fibre laser |
| CN109217085A (en) * | 2018-09-06 | 2019-01-15 | 上海理工大学 | A kind of partially ultrafast fiber laser system of all risk insurance of passive full phototiming |
| CN109888602A (en) * | 2019-01-25 | 2019-06-14 | 北京航天计量测试技术研究所 | A kind of all risk insurance mixes ytterbium femtosecond fiber optical frequency com system partially |
| CN111725691A (en) * | 2020-06-03 | 2020-09-29 | 华东师范大学 | Thulium-doped optical fiber optical frequency comb system based on nonlinear polarization rotation mode locking |
| CN111638202A (en) * | 2020-06-04 | 2020-09-08 | 清华大学 | Double-optical-comb coherent anti-Stokes Raman spectrum detection system for localized rapid time-delay scanning |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107732638B (en) | 2019-06-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107732638B (en) | Optical frequency carding device and mode locking locking method based on full polarization fibre | |
| Luo et al. | Tunable and switchable multiwavelength passively mode-locked fiber laser based on SESAM and inline birefringence comb filter | |
| US8237122B2 (en) | Optical scanning and imaging systems based on dual pulsed laser systems | |
| US5119383A (en) | Antiresonant nonlinear mirror for passive laser modelocking | |
| CN106711745A (en) | Wide-tuning and narrow-linewidth nanosecond pulse double-resonance medium-infrared parameter oscillator | |
| KR101501509B1 (en) | Dual Optical-comb Femto-second Optical Fiber Laser | |
| JPH10213827A (en) | Device and method for generating high output optical pulse | |
| CN107302183A (en) | A kind of continuous light injects the pulse laser of semiconductor optical amplifier | |
| JPH01147881A (en) | Mode-locked laser | |
| CN105141258A (en) | Microwave frequency conversion method and apparatus | |
| CN103299494A (en) | Compact, high brightness light sources for the mid and far IR | |
| CN204992236U (en) | Passive mode locking linear polarization psec pulsed optical fibre laser ware | |
| Yang et al. | Tunable femtosecond laser from 965 to 1025 nm in fiber optical parametric oscillator | |
| Hou et al. | Experimental generation of optical non-classical states of light with 1.34 μ m wavelength | |
| US3714607A (en) | Acousto optic method and apparatus for mode decoupling a ring laser | |
| Zhao et al. | Continuous variable entanglement distribution for long-distance quantum communication | |
| CN109361145A (en) | Single wavelength is tunable Q-switch and mode-locking pulse laser | |
| CN108832471A (en) | A kind of dual wavelength lock-out pulse optical fiber laser | |
| Kaminskii et al. | Laser 4 F 3/2→ 4 I 9/2 and 4 F 3/2→ 4 I 13/2 transitions in KY (WO 4) 2: Nd 3+ | |
| CN103326221B (en) | Method for reinforcing frequency doubling luminous efficacy by utilizing annular optical fiber active cavity resonance | |
| Soccolich et al. | Passively mode locked femtosecond color center lasers in the erbium gain band | |
| US20230296911A1 (en) | Nonlinear polarization filtering method, device, and application apparatus | |
| Biaggio et al. | Intracavity frequency doubling of a diode pumped nd: Yag laser using a knbo3 crystal | |
| Voropaev et al. | High power multi-soliton and noise-like pulse generation regimes in a passively mode-locked thulium-doped all-fiber ring oscillator | |
| CN107275915B (en) | A kind of Erbium doped fiber femtosecond laser based on 8 word chamber mode locking of mixed type |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |