CN107732638B - Optical frequency carding device and mode locking locking method based on full polarization fibre - Google Patents
Optical frequency carding device and mode locking locking method based on full polarization fibre Download PDFInfo
- Publication number
- CN107732638B CN107732638B CN201710985094.6A CN201710985094A CN107732638B CN 107732638 B CN107732638 B CN 107732638B CN 201710985094 A CN201710985094 A CN 201710985094A CN 107732638 B CN107732638 B CN 107732638B
- Authority
- CN
- China
- Prior art keywords
- polarization
- helical fiber
- fiber
- pulse
- 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.)
- Active
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
Abstract
The present invention relates to a kind of optical frequency carding device and mode locking locking method based on full polarization fibre realizes that mode locking pulse is generated 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；Power control device in device is fed back to after carrier wave position phase zero frequency signal is passed through processing of circuit, or feeds back to cavity loss control device, realizes 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, and the walk-off effect of pulse is solved by the specific configuration of multistage Helical Fiber.Manufactured full polarization fibre optical frequency carding device has high stability, the feature insensitive to temperature fluctuation, mechanical oscillation.
Description
Technical field
The present invention relates to a kind of laser technology, in particular to a kind of optical frequency carding device and lock based on full polarization fibre
Mold lock frequency method.
Background technique
Optical frequency com has very important answer on accurate spectral measurement, Time and frequency standard, absolute distance measurement
With.Currently, the key components of optical frequency com are ultrashort pulse laser oscillators.The arteries and veins of the ultrashort pulse laser oscillator
Mode locking principle is rushed, the factors such as light channel structure have vital influence to the performance of light comb.
Currently, based on the optical frequency com of optical fiber structure compared to the light of solid state gain medium in stability and practicability
Comb has a significant advantage, such as flexible waveguiding structure optical path, lightweight is easy of integration, heat dissipation performance is good.Optical fiber light comb is logical
Frequently with two class mode locking modes.Wherein, the first kind is using saturable absorber in kind, such as semiconductor saturable absorbing mirror, stone
Black alkene, carbon nanotube 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 due to the interior disturber's mask grasping birefringent presence and transmitting in isolation external environment to laser
There is significant advantage, can be interfered with environment resistant, the stability for transmitting signal is strong.Optical fiber light comb based on full polarization fibre is light comb skill
Art moves towards unique effective way of client.Currently, the light comb based on first kind material object saturable absorber has several reports；
In the recent period based on the virtual saturable absorber of the second class (nonlinear interference annular mirror or nonlinear interference annular mirror) with amplification
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, not yet appearance the optical fiber light comb based on polarization maintaining optical fibre nonlinear polarization rotation.
Nonlinear polarization rotation mode locking is realized by two polarized components Cross-phase Modulation in a fiber of pulse
Polarization rotation.And single mode optical fiber can be seen as almost grasping birefringent optical fiber without in, any two are orthogonal partially
Vibration direction there's almost no group velocity difference.Therefore, the orthogonal polarized component of any two can keep foot in single mode optical fiber
Enough time-interleavings, and then enough Nonlinear Cumulatives can be generated by Cross-phase Modulation；Further, since the two polarized components
Preferably, they still can be decomposed and be synthesized on polarization-dependent isolator 108 for overlapping in time, be realized to intracavitary pulse
Loss control, i.e. realization optical kerr effect.
The difficulty that full polarization fibre light comb based on nonlinear polarization rotation mode locking is primarily present is as follows:
The first, in general, polarization maintaining optical fibre is birefringent there are grasping in stronger.When the incident pulse of linear polarization is along polarization-maintaining
When the fast axle or slow axis incidence of optical fiber, 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 it is any other axial incident when, linear polarization changes generating period, and line is inclined
Vibration and elliptical polarization are alternately present.After pulse transmits certain distance in polarization maintaining optical fibre, due to birefringent presence, fast axle and
Polarized component on slow axis can be gone away in time.Escaping rear polarizer component can not generate Cross-phase Modulation.
The second, due to the escaping of the polarized component in fast axle and slow axis, pulse division can be generated.Pulse after division can not
It is synthesized or is decomposed on polarization-dependent isolator 108, that is, cannot achieve the loss control to intracavitary pulse.
Third, the presence due to thermally induced birefringence, i.e. optical fiber fast axle and slow axis change the folding generated for environment temperature
Penetrate rate variable quantity difference, the i.e. difference of temperature change refractive index influence.Thermally induced birefringence can significantly impact pulse in optical fiber
Linear and nonlinear phase delay in fast axle and slow axis, and then influence the stability of laser transmission.
Summary of the invention
The present invention be directed to polarization maintaining optical fibre be applied to optical fiber light comb there are the problem of, propose a kind of fine based on full polarization
Optical frequency carding device and mode locking locking method, mode-locked laser is built based on full polarization fibre, pulse is in Helical Fiber
Nonlinear polarization rotation occurs, the walk-off effect of pulse is solved by the specific configuration of multistage Helical Fiber.
The technical solution of the present invention is as follows: a kind of optical frequency carding device based on full polarization fibre, by full polarization it is fine and
Polarization-preserving optical fibre device is constituted, and the first pumping source output light enters optical fiber by the acousto-optic modulator as power control device and recycles
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 arrives output coupler, exports 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
It is successively formed between three sections of different index regions, first interval is that section, second interval are variable refractivity section, third 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, generate mode locking pulse.
The polarization transmission direction of the polarization-dependent isolator and the first Helical Fiber first interval input terminal incident light are inclined
Vibration direction is vertical.
The repetition rate locking device be automatically controlled piezoelectric ceramics perhaps electrooptic modulator or by the second pump light,
The non-linear pumping refractive index modulation device or above-mentioned piezoelectricity of second wavelength division multiplexer and the second gain fibre composition
Ceramic, non-linear pumping refractive index modulation device, three kinds of electrooptic modulator of any two kinds of groups are combined into or three kinds of combinations.
The mode locking locking method of the optical frequency carding device based on full polarization fibre is exported from loss control device
Linearly polarized light along the first Helical Fiber the incident first Helical Fiber first interval of slow axis, 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, it is gradually evolved into elliptical polarization, and the ellipse degree of bias is continuously increased, different polarization component generates the phase shift not waited, but two is inclined
Shaking, the component still retention time is overlapping, 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, since the fast axle and slow axis of 3rd interval are rolled over
It is equal to penetrate rate, linear phase shiftAgain since two polarized component times are overlapping, there are nonlinear phase shiftsWork as pulse
It is still oval pulse after the second Helical Fiber 3rd interval uniform pitch section is entered from the 3rd interval of the first Helical Fiber,
Its linear phase shiftAgain since two polarized component times are overlapping, there are nonlinear phase shiftsWhen pulse is from the second spiral shell
After optically-active fibre 3rd interval enters the second Helical Fiber second interval variable refractivity section, generating linear phase shift amount is
Nonlinear phase shift amount isSince the first Helical Fiber and the second Helical Fiber are complete same optical fiber,That is line
Property 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 at linear polarization pulse, when pulse peak power reaches a certain particular value, i.e., pulse is in the first spiral
The total nonlinear phase shift accumulated in optical fiber and the second Helical FiberWhen reaching π, this
When, the polarization state of the second Helical Fiber first interval output end emergent light is compared to the first Helical Fiber first interval input terminal
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 the
One section input terminal polarization direction is vertical；It is penetrated again from polarization-dependent isolator, that is, realizes the polarization regulated and controled by nonlinear effect
Dependent loss generates mode locking pulse.
The mode locking locking method of the optical frequency carding device based on full polarization fibre, repetition rate locking device are electricity
One section of optical fiber after polarization-dependent isolator output end is pasted the side of piezoelectric ceramics, by electroluminescent by the piezoelectric ceramics of control
Flexible fine tuning fiber lengths, and then the geometry cavity for controlling optical frequency carding device is long, realizes that repetition rate locks with this.
The mode locking locking method of the optical frequency carding device based on full polarization fibre, repetition rate locking device are non-
Linear pump refractive index modulation device, changes the intensity of the second pump light to 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 mode locking locking method of the optical frequency carding device based on full polarization fibre, repetition rate locking device are electricity
Optical modulator by the refractive index of electro-optic crystal in control electrooptic modulator, and then controls the optics cavity of optical frequency carding device
It is long, realize that repetition rate locks with this.
The mode locking locking method of the optical frequency carding device based on full polarization fibre, is amplified by full polarization fibre
Device, polarization-maintaining nonlinear optical fiber and PPLN crystal obtain the carrier wave position phase zero frequency signal of pulse, by the zero frequency signal through oversampling circuit at
The first pumping source is fed back to after reason, perhaps feeds back to the acousto-optic modulator of control pump light intensities or feeds back to loss control
Element realizes 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 optical frequency carding device of full polarization fibre and mode locking frequency locking sides
Method, manufactured full polarization fibre optical frequency carding device has high stability, insensitive to temperature fluctuation, mechanical oscillation
Feature.
Detailed description of the invention
Fig. 1 is that the present invention is based on the optical frequency com apparatus structure schematic diagrams of full polarization fibre；
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.
Specific embodiment
The structural schematic diagram of optical frequency carding device 100 as shown in Figure 1 based on full polarization fibre.Whole device is by all risk insurance
Polarisation is fine and polarization-preserving optical fibre device is constituted.
Device includes the first pumping source 101, acousto-optic modulator 102, the first wavelength division multiplexer 103, the first gain fibre
104, output coupler 105, loss control device 106, Helical Fiber 107, polarization-dependent isolator 108, the second pumping source
109, the second wavelength division multiplexer 110, the second gain fibre 111, piezoelectric ceramics 112, electrooptic modulator 113 and output port 114.
First pumping source, 101 output light enters optical fiber by the acousto-optic modulator 102 as power control device and recycles link, and light is successively
The first wavelength division multiplexer 103, the first gain fibre 104, output coupler 105, loss control device in link are recycled by optical fiber
Part 106, Helical Fiber 107, polarization-dependent isolator 108 and repetition rate locking device return to the first wavelength division multiplexer 103,
By the first gain fibre 104, output coupler 105 is arrived, is 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 second gain fibre 111 form non-linear pumping refractive index modulation device or electrooptic modulator 113, either
Any two kinds of groups of three are combined into 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 are controlled
The geometry cavity of optical fiber light comb oscillator is long；Non-linear pumping refractive index modulation technology is in optical frequency carding device optical 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 controls the refractive index of the optical fiber, and then realizes 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 realizes that repetition rate locks with this.
107 connection type of Helical Fiber 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 Helical Fiber 107a points are the firstth area between three index regions
Between 107a1 be without spin section, slow axis and fast axle have fixed refractive index, the polarization along fast axle or slow axis incident light can be kept
State；Second interval 107a2 is variable refractivity section, and the state of spiral, spiral are formed by spin fiber under heating conditions
Screw 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 terminal, and first interval 107b1 is output end, that is, the third area of the first Helical Fiber
Between 107a3 connect with the 3rd interval 107b3 of the second Helical Fiber.
The specific method of mode locking is slow axis incident first Helical Fiber first of the linearly polarized light along the first Helical Fiber 107a
Section 107a1 keeps 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 refractivity section, it is gradually evolved into elliptical polarization,
And the ellipse degree of bias is continuously increased, different polarization component generates the phase shift not waited, but the two polarized components still retention time is overlapping, middle 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, since the fast axle and slow axis refractive index of 3rd interval 107a3 are equal,
Linear phase shiftAgain since two polarized component times are overlapping, there are nonlinear phase shiftsIn order to offset linear phase shift
With accumulation nonlinear phase shift, the first Helical Fiber 3rd interval 107a3 output end 1072 and the second Helical Fiber 3rd interval
107a3 input terminal 1073 is connected.When pulse enters the second Helical Fiber from the 3rd interval 107a3 of the first Helical Fiber
It is still oval pulse, linear phase shift behind three sections 107b3 uniform pitch sectionAgain since two polarized component times handed over
Folded, there are nonlinear phase shiftsWhen pulse enters the second Helical Fiber from the second Helical Fiber 3rd interval 107b3
Behind two sections 107b2 variable refractivity section, generating 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 pulse enters the second Helical Fiber first interval 107b1 from the second Helical Fiber second interval 107b2, pulse from it is oval partially
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 1074 emergent light of the second Helical Fiber first interval output end is inputted 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 terminal are vertical.
Input terminal of the first Helical Fiber first interval input terminal 1071 as Helical Fiber 107；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 terminal of polarization-dependent isolator 108, polarizes related isolation
The polarization transmission direction of device 108 is vertical with 1071 incident light polarization direction of the first Helical Fiber first interval input terminal.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 terminal incidence 1071, by
One Helical Fiber 107a and the second Helical Fiber 107b generates 90 degree of polarization rotation, and penetrates from polarization-dependent isolator 108,
Realize the Polarization Dependent Loss regulated and controled by nonlinear effect.When incident pulse energy is lower, can not be generated in Helical Fiber
When enough nonlinear phase shifts, polarization-dependent isolator 108 can not be penetrated；It is only generated in Helical Fiber when incident pulse non-thread
Property phase shift, or occur polarization rotation when, could it is some or all of penetrate polarization-dependent isolator 108.
The polarization-dependent isolator 108 or the relevant any optical fiber coupling device of polarization, such as polarization beam apparatus,
The beam splitter etc. of single shaft work.
Piezoelectric ceramics 112 or non-linear pumping refractive index modulation technology can be used in repetition rate locking means, 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 the geometry cavity for controlling optical frequency carding device is long；Non-linear pumping refractive 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 optical fiber link, are passed through
The inverted population for controlling 109 the second gain fibre of strength control 111 of the second pump light controls the refractive index of the optical fiber, into
And realize the control to optical frequency carding device optical cavity length；By controlling the refractive index of electro-optic crystal in electrooptic modulator, into
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 it is non-linear pumping refractive index modulation technology or 113 3 kinds of electrooptic modulator any one,
Two kinds of groups are combined into 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 intracavitary loss control element 106, realizes carrier wave
The locking of position phase zero frequency signal.
First 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 second gain fibre 111 are the optical fiber of variety classes doping.
The mode locking pulse of optical frequency carding device based on full polarization fibre generates non-in Helical Fiber by pulse
Linear polarization rotates to realize.Pass through the repetition rate of mechanical means or optical means locking device.Pass through full polarization fibre
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 power control device in device after processing of circuit, or cavity loss control device is fed back to, realizes carrier wave position
The locking of phase zero frequency signal.
Claims (2)
1. a kind of mode locking locking method of the optical frequency carding device based on full polarization fibre, optical frequency carding device are inclined by all risk insurance
Optical fiber and polarization-preserving optical fibre device are constituted, and the first pumping source output light enters light by the acousto-optic modulator as power control device
Fibre circulation link, light pass sequentially through the first wavelength division multiplexer, the first gain fibre, output coupler, damage in optical fiber circulation link
Control device, Helical Fiber, polarization-dependent isolator and repetition rate locking device are consumed, the first wavelength division multiplexer is returned to, passes through
First gain fibre arrives output coupler, exports 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
It is successively formed between different index regions, first interval is that 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 generates mode locking pulse；
The polarization transmission direction of the polarization-dependent isolator and the first Helical Fiber first interval input terminal incident light polarization side
To vertical；
The repetition rate locking device is automatically controlled piezoelectric ceramics perhaps electrooptic modulator or by the second pump light, second
The non-linear pumping refractive index modulation device or above-mentioned piezoelectricity pottery of wavelength division multiplexer and the second gain fibre composition
Porcelain, non-linear pumping refractive index modulation device, three kinds of electrooptic modulator of any two kinds of groups are combined into or three kinds of combinations；
It is characterized in that, slow axis incident first spiral light of the linearly polarized light exported from loss control device along the first Helical Fiber
Fine first interval keeps linear polarization constant in the first Helical Fiber first interval；Pulse is from first the firstth area of Helical Fiber
Between enter the first Helical Fiber second interval variable refractivity section after, be gradually evolved into elliptical polarization, and the ellipse degree of bias constantly increases
Add, different polarization component generates the phase shift not waited, but the two polarized components still retention time is overlapping, and wherein linear phase shift amount isNonlinear phase shift amount isWhen pulse enters the first Helical Fiber third area from the first Helical Fiber second interval
Between uniform pitch section, since the fast axle and slow axis refractive index of 3rd interval are equal, linear phase shiftAgain due to two polarizations
The component time is overlapping, and there are nonlinear phase shiftsWhen pulse enters the second spiral from the 3rd interval of the first Helical Fiber
It is still oval pulse, linear phase shift behind optical fiber 3rd interval uniform pitch sectionAgain due to two polarized component times
Overlapping, there are nonlinear phase shiftsWhen pulse enters second the secondth area of Helical Fiber from the second Helical Fiber 3rd interval
Between behind variable refractivity section, generating linear phase shift amount isNonlinear phase shift amount isDue to the first Helical Fiber with
Second Helical Fiber is complete same optical fiber,I.e. linear phase shift is cancelled out each other；When pulse is from the second Helical Fiber second
After section enters the second Helical Fiber first interval, pulse, at linear polarization pulse, works as pulse peak from elliptical polarization pulse evolution
Value power reaches a certain particular value, i.e. total nonlinear phase shift for accumulating in the first Helical Fiber and the second Helical Fiber of pulseWhen reaching π, at this point, the second Helical Fiber first interval output end emergent light 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 terminal
The polarization state of output end outgoing is vertical compared to the first Helical Fiber first interval input terminal polarization direction；Again from polarization it is related every
It is penetrated from device, that is, realizes the Polarization Dependent Loss regulated and controled by nonlinear effect, generate mode locking pulse.
2. the mode locking locking method of the optical frequency carding device according to claim 1 based on full polarization fibre, 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 CN107732638A (en) | 2018-02-23 |
| CN107732638B true 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) |
Families Citing this family (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 |
| CN109217085B (en) * | 2018-09-06 | 2020-09-01 | 上海理工大学 | Passive all-optical synchronous full-polarization-preserving ultrafast optical fiber laser system |
| 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 |
| CN111638202B (en) * | 2020-06-04 | 2021-05-28 | 清华大学 | Double-optical-comb coherent anti-Stokes Raman spectrum detection system for localized rapid time-delay scanning |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8787410B2 (en) * | 2011-02-14 | 2014-07-22 | Imra America, Inc. | Compact, coherent, high brightness light sources for the mid and far IR |
| 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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107732638A (en) | 2018-02-23 |
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 | |
| US9698559B2 (en) | Optical scanning and imaging systems based on dual pulsed laser systems | |
| Hofer et al. | Characterization of ultrashort pulse formation in passively mode-locked fiber lasers | |
| KR101501509B1 (en) | Dual Optical-comb Femto-second Optical Fiber Laser | |
| CN105141258B (en) | A kind of microwave conversion method and device | |
| US5119383A (en) | Antiresonant nonlinear mirror for passive laser modelocking | |
| JPH10213827A (en) | Device and method for generating high output optical pulse | |
| JPH01147881A (en) | Mode-locked laser | |
| CN107302183A (en) | A kind of continuous light injects the pulse laser of semiconductor optical amplifier | |
| Villanueva et al. | Active and passive mode-locked fiber lasers for high-speed high-resolution photonic analog-to-digital conversion | |
| Peng et al. | Study of an er-doped all-pm-fiber laser mode-locked by nonlinear polarization evolution | |
| Wu et al. | Nonlinear polarization evolution mode-locked YDFL based on all-PM fiber cavity | |
| Rodríguez-Morales et al. | Sub-200-kHz single soliton generation in a long ring Er-fiber laser with strict polarization control by using twisted fiber | |
| Jang et al. | Environmentally-stable all-normal-dispersion picosecond Yb-doped fiber laser with an achromatic quarter-wave-plate | |
| CN108598856A (en) | Femto-second laser | |
| US3714607A (en) | Acousto optic method and apparatus for mode decoupling a ring laser | |
| CN114899688A (en) | Device and method for generating polarization multiplexing dual-optical-frequency comb | |
| CN108832471A (en) | A kind of dual wavelength lock-out pulse optical fiber laser | |
| Luo et al. | Multi-wavelength erbium-doped fiber ring laser based on wavelength-dependent polarization rotation with a phase modulator and an in-line comb filter | |
| 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 | |
| Yoshino et al. | Fiber-coupling-operated orthogonal-linear-polarization Nd: YAG microchip laser: photothermal beat-frequency stabilization and interferometric displacement measurement application | |
| Pan et al. | Tunable and Switchable Low-Threshold Multi-Wavelength Erbium-Doped Fiber Pulsed Laser Based on Lyot Filter and NOLM | |
| US20230296911A1 (en) | Nonlinear polarization filtering method, device, and application apparatus |
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 |