CN208142528U - A kind of laser frequency stabilisation device based on spatial model interference - Google Patents
A kind of laser frequency stabilisation device based on spatial model interference Download PDFInfo
- Publication number
- CN208142528U CN208142528U CN201820526476.2U CN201820526476U CN208142528U CN 208142528 U CN208142528 U CN 208142528U CN 201820526476 U CN201820526476 U CN 201820526476U CN 208142528 U CN208142528 U CN 208142528U
- Authority
- CN
- China
- Prior art keywords
- laser
- optical resonator
- direct current
- optical
- spatial model
- 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.)
- Expired - Fee Related
Links
Landscapes
- Lasers (AREA)
Abstract
The utility model discloses a kind of laser frequency stabilisation devices based on spatial model interference, and the characteristic that TEM10 mould is two valve ellipse spots is utilized, the half that a barrier blocks the reflected beams is added in the reflection light field of optical resonator, using the interference of a valve of TEM10 mould and TEM00 mould as error signal, using the piezoelectric ceramics for being loaded into optical resonator after the processing of servo-control system（PZT）On, to achieve the purpose that frequency stabilization.The utility model based on spatial model interference laser frequency stabilisation device it is simple and convenient, without to light field carry out phase-modulation and demodulation filtering operation, reduce system complexity, improve the reliability of system；System structure is simple, easy to operate, and compact-sized, at low cost and frequency stabilization works well.
Description
Technical field
The utility model relates to laser frequency stabilization fields, fill more particularly to a kind of laser frequency stabilization based on spatial model interference
It sets.
Background technique
At present there are many laser steady frequency technology implementation methods, for example sideband modulation frequency stabilization, spatial model interfere frequency stabilization etc..This
The selection of frequency reference standard includes two classes in a little Frequency Stabilization Techniques：Atom and molecule Absorption Line and optical resonator.Wherein optics is humorous
Vibration chamber has stability is high, is not excited optical wavelength to limit and be widely adopted.Frequency stabilization index best at present is exactly using super steady
What resonant cavity was realized.
Spatial model interference technique detects the offset direction of laser frequency using TEM00 mould and TEM10 Mode interference.This method
Have the characteristics that system structure is simple, operation is easy, effect and sideband modulation frequency stabilization than, but need one be of little use two
Pixel photodetector detection of error signals, which increase the complexity of system and costs.
Utility model content
The utility model master is to solve the shortcoming of existing issue and provide a kind of laser based on spatial model interference
Frequency regulator.
The utility model takes following technical scheme：A kind of laser frequency stabilisation device based on spatial model interference, including list
Longitudinal-mode laser, optical resonator, light beam baffle and single pixel direct current photodetector；
Wherein, single longitudinal mode laser, optical resonator, light beam baffle and single pixel direct current photodetector are set to a finger
On fixed laser optical path；Single longitudinal mode laser generates laser beam, and laser beam is emitted to optical resonator, laser beam
Processing through optical resonator, treated laser beam is emitted to single pixel direct current photodetector, light beam baffle plate setting in
In optical path between optical resonator and single pixel direct current photodetector, to will treated that laser beam is divided into first swashs
Light ray and second laser ray, and stop first laser ray, so that second laser ray is injected the photodetection of single pixel direct current
Device.
It wherein, further include optical isolator, optical isolator is set between single longitudinal mode laser and optical resonator
In optical path, to prevent laser beam to be reflected back single longitudinal mode laser.
Wherein, optical resonator includes the first high reflective mirror and the second high reflective mirror, and laser enters after optical resonator through first
The reflection of high reflective mirror and the second high reflective mirror and or projection inject to the single pixel direct current photodetector being arranged in optical path.
Wherein, light beam baffle is set from the laser optical path that the first high reflective mirror projects.
It wherein, further include servo-control system, servo-control system includes proportional integral circuit, high-voltage amplifier and function
Generator, proportional integral circuit connect the single pixel direct current photodetector being arranged on the laser optical path that the first high reflective mirror projects,
High-voltage amplifier connects the piezoelectric ceramics of proportional integral circuit and optical resonator, and function generator connects high-voltage amplifier.
Wherein, single longitudinal mode laser, optical isolator, optical resonator, light beam baffle and single pixel direct current photodetection
Reflecting mirror is set between device, to extend the transmission optical path of laser.
It is different from the prior art, TEM10 is utilized in the laser frequency stabilisation device based on spatial model interference of the utility model
Mould is the characteristic of two valve ellipse spots, and a barrier is added in the reflection light field of optical resonator and blocks the one of the reflected beams
Half, using the interference of a valve of TEM10 mould and TEM00 mould as error signal, after the processing of servo-control system
It is loaded on the piezoelectric ceramics (PZT) of optical resonator, to achieve the purpose that frequency stabilization.The utility model based on spatial model
The laser frequency stabilisation device of interference is simple and convenient, the operation without carrying out phase-modulation and demodulation filtering to light field, reduces system
Complexity improves the reliability of system；System structure is simple, easy to operate, and compact-sized, at low cost and frequency stabilization effect is good
It is good.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of laser frequency stabilisation device based on spatial model interference provided by the utility model.
Fig. 2 is a kind of phase of the TEM00 mould of laser frequency stabilisation device based on spatial model interference provided by the utility model
Position with frequency variation schematic diagram.
Fig. 3 is a kind of phase of the TEM10 mould of laser frequency stabilisation device based on spatial model interference provided by the utility model
Position with frequency variation schematic diagram.
Fig. 4 is a kind of phase of the error signal of laser frequency stabilisation device based on spatial model interference provided by the utility model
Position with frequency variation schematic diagram.
Specific embodiment
Further more detailed description is made to the technical solution of the utility model With reference to embodiment.Obviously,
Described embodiment is only a part of the embodiment of the utility model, instead of all the embodiments.It is practical new based on this
Embodiment in type, those of ordinary skill in the art's every other reality obtained without creative labor
Example is applied, all should belong to the range of the utility model protection.
Refering to fig. 1, Fig. 1 is a kind of structure of laser frequency stabilisation device based on spatial model interference provided by the utility model
Schematic diagram.The device includes：Single longitudinal mode laser 1, optical resonator 2, light beam baffle 3 and single pixel direct current photodetector 4；
Wherein, single longitudinal mode laser 1, optical resonator 2, light beam baffle 3 and single pixel direct current photodetector 4 are set to
On one specified laser optical path；Single longitudinal mode laser 1 generates laser beam, and laser beam is emitted to optical resonator 2, swashs
Processing of the light ray through optical resonator 2, treated, and laser beam is emitted to single pixel direct current photodetector 4, light beam gear
Plate 3 is set in the optical path between optical resonator 2 and single pixel direct current photodetector 4, to by treated, laser is penetrated
Line is divided into first laser ray and second laser ray, and stops first laser ray, and second laser ray is made to inject single pixel
Direct current photodetector 4.
It preferably, further include optical isolator 5, optical isolator 5 is set to single longitudinal mode laser 1 and optical resonator 2
Between optical path on, to prevent laser beam to be reflected back single longitudinal mode laser 1, single longitudinal mode laser 1 is damaged.
Preferably, optical resonator 2 includes that the first high reflective mirror 21 and the second high reflective mirror 22, laser enter optical resonator 2
By the first high reflective mirror 21 and the second high reflective mirror 22 reflection and or projection inject to the single pixel direct current being arranged in optical path
Photodetector 4.
Preferably, light beam baffle 3 is set from the laser optical path that the first high reflective mirror 21 projects.
It preferably, further include servo-control system 6, servo-control system includes proportional integral circuit 61, high-voltage amplifier
62 and function generator 63, it is straight that proportional integral circuit 61 connects the single pixel being arranged on the laser optical path that the first high reflective mirror 21 projects
Streamer electric explorer 4, high-voltage amplifier 62 connect the piezoelectric ceramics of proportional integral circuit 61 and optical resonator 2, and function occurs
Device 63 connects high-voltage amplifier 62.
Preferably, single longitudinal mode laser 1, optical isolator 5, optical resonator 2, light beam baffle 3 and single pixel direct current light
Reflecting mirror is set between electric explorer 4, to extend the transmission optical path of laser.
Exemplary, the structure of the utility model is as shown in Figure 1, in single longitudinal mode laser 1, optical isolator 2, optical resonance
Reflecting mirror is set between chamber 3, light beam baffle 4 and single pixel direct current photodetector 5, has both met the transmission optical path for extending laser
Demand, while device space can be saved.
Single longitudinal mode laser 1 generates laser beam, is emitted into optical isolator 5, since reflection being arranged between each component
Mirror, therefore an optical isolator 5, which is arranged, after single longitudinal mode laser 1 issues laser beam to effectively prevent laser beam to be reflected back
To single longitudinal mode laser 1, laser emitter is damaged and is caused damages.
Before laser beam enters optical resonator 2 from optical isolator 5, a reflecting mirror need to be set.The reflecting mirror is used
Enter the direction of the laser beam of optical resonator 2 in adjusting.Laser beam is by being set to optical isolator 5 and optical resonance
The reflex of reflecting mirror between chamber 2 is irradiated on the first high reflective mirror 21 in optical resonator 2.It is high anti-to project first
Laser beam on mirror 21 only can transmit TEM00 mould when chamber length is scanned specific position, then will be incident in other positions
Light on to the first high reflective mirror 21 in optical resonator 2 all reflects.The laser projection of reflection is to single pixel direct current photoelectricity
Detector 4 is provided with light beam baffle 3 in the optical path of indirect ray, by the way that the position of light beam baffle 3 is arranged, and makes by the
The laser beam of one lens 21 reflection is divided into first laser ray and second laser ray, while stopping the by light beam baffle 3
One laser beam continues to transmit along original optical path, and second laser ray emission is made to enter single pixel direct current photodetector 4.
In the present invention, specific position is scanned constantly in chamber length, the first high reflective mirror 21 makes in addition to TEM00 mould
Laser beam reflects, and transmits TEM00 mould, into optical resonator 2, and projects on the second high reflective mirror 22,
Second high reflective mirror 22 and 21 material of the first high reflective mirror are similar or even identical, and the laser beam transmitted projects the second high reflective mirror
After on 22, the laser beam of wherein most reflects, to form optical path counterclockwise in optical resonator 2, residue swashs
Light ray transmits, and projects optical resonator 2, is emitted in another single pixel direct current photodetector 4.Through the first high reflective mirror
The laser beam of 21 reflections is after the barrier effect of light beam baffle 3, into single pixel direct current photodetector 4.The single pixel is straight
Streamer electric explorer 4 connects the proportional integral circuit 61 of servo-control system 6, while connecting an oscillograph (not indicating), ratio
Integrating circuit 61 connects high-voltage amplifier 62, and high-voltage amplifier 62 connects the piezoelectric ceramics 23 in optical resonator 2, high voltage amplifier
Device 62 is also connected with a function generator 63.In specific embodiment of the present utility model, single longitudinal mode laser 1 generates specified strong
The laser beam of degree is reflected into optical isolator 5 through a reflecting mirror (not indicating), anti-through in addition one or several after injection
Mirror (not indicating) reflection is penetrated, is projected on the first high reflective mirror 21 of optical resonator 2.As shown, in optical isolator 5 and light
It learns and is provided with three reflecting mirrors between resonant cavity 2, while condenser is set between mirrors, play and match the waist spot of laser
The effect intracavitary to optical resonance.Meanwhile the last one reflective mirror by adjusting laser beam before entering optical resonator 2
Angle, it can be achieved that adjustment laser beam projects the angle of the first high reflective mirror 21.By adjusting the angle of the reflective mirror, make to swash
Light ray is projected on the first high reflective mirror 21 with specified angle.After the effect of optical resonator 2, second laser ray is injected
In single pixel direct current photodetector 4, laser beam signal corresponding conversion that single pixel direct current photodetector 4 can will receive
For electric signal, and press height by the effect of function generator 63 proportional integral circuit 61 that electric signal is output to connection
Big device 62 exports triangle wave voltage signal, and high-voltage amplifier 62 connects the piezoelectric ceramics 23 of optical resonator 2, with to piezoelectric ceramics
23 apply voltage, and piezoelectric ceramics 23 occurs to stretch, so that the chamber for changing optical resonator 2 is long under voltage effect.Adjust ratio
Example integrating circuit 61 and high-voltage amplifier 62, the image that the signal observed in proportional integral circuit 61 generates in oscillograph, when
When obtaining required image, stop adjustment reflective mirror and proportional integral circuit 61, the voltage for exporting high-voltage amplifier 62 is fixed
Value, and the size of fixed value is that the voltage value that high-voltage amplifier 62 exports when required image is obtained in oscillograph.
The essence of optical resonator 2 is a mode cleaner.From single longitudinal mode laser 1 be emitted laser actually include
A series of different mode, optical resonator 2 selects one of them to come out from this train patterns, exemplary, will wherein
TEM00 mode elect.The purpose of pattern match is exactly to eliminate the even-order modes in mode, passes through carefully collimated light
Road can eliminate odd order modes, thus only leave TEM00 mode.
In the utility model, the laser being injected into optical resonator 2 is done into minor shifts, swashs the TEM00 mould of injection
Issue TEM10 mould.When laser frequency is near the TEM00 mould resonant frequency of optical resonator 2, the phase of the TEM00 mould of reflection
It is detuning to be proportional to chamber, and TEM10 mould does not resonate near this frequency, the TEM10 mould phase of reflection does not change with frequency.Chamber
When resonance, two valve of left and right of TEM10 mould and the left and right two halves of TEM00 mould are interfered, their interference light intensity is to laser frequency
Response it is just the opposite, therefore with single pixel direct current photodetector 4 separately detect two valve of left and right of light field and by photoelectric current phase
The photoelectric current for being proportional to laser frequency offset can be arrived by subtracting, and be to single longitudinal mode laser 1 by loop filter feedback by it
Frequency stabilization can be achieved.
When optical path is entirely collimated and mode exactly matches, for TEM00 mould, only when chamber length is scanned as half-wave
Long integral multiple, the i.e. frequency of light wave are precisely the free spectral range Δ v of chamberfsrWhen an integral multiple of ≡ c/2L,
TEM00 mould is not reflected completely into intracavitary.And when chamber is long be scanned as the integral multiple of the half of half-wavelength when,
TEM00 mould is fully reflective.Later, optical path is slightly tilted, it will obtain two valves relative to TEM00 mould has ± pi/2 respectively
Phase difference TEM10 mould, TEM10 mould will undergo a gouy phase shift intracavitary, thus with chamber off-resonance.TEM00 mould and
The phase of TEM10 mould and the relationship of frequency are as shown in Figures 2 and 3.If incident field is
Einc=E0eiwt (1)
The reflectivity of chamber is the function of incident field and reflection light field
Since the technology obtains error signal by the interference of high order spatial mode, we can be decomposed incident field
For a series of spatial model, these spatial models can be described by orthonormal Hermitian-Gaussian function.We only consider
The interference of TEM00 mould and TEM10 mould, because for TEM10 mould, even the inclination of a low-angle, which remains on, to be obtained
The amplitude considerable to one.In beam waist position, both modes can be by being described with minor function：
Wherein, ω is beam radius, and x is lateral coordinates, and y is longitudinal coordinate, C00And C01It is constant coefficient.If we are young
Thin ground collimated light path is simultaneously allowed to mode exact matching, and incident field can be expressed as at this time：
Einc=E0eiwtU00 (x, y) (5)
Optical path is slightly tilted later, it will introduces TEM10 mould
Einc=E0eiwt(a0U00(x, y)+ia1U01(x)) (6)
Wherein, a0And a1The inclined degree of optical path is reflected, and is metReflection light field should be at this time：
Eref=E0eiwt(a0U00(x, y) F+ia1U01(x, y)) (7)
Error signal in order to obtain, it would be desirable to calculate reflection power Pref, this can pass throughCome
It arrives：
For reflection power, we, which only need to integrate light intensity, to obtain, but the list common for one
For pixel detector, due to Hermitian-Gaussian function orthogonality,
Will lead to integral in total space integral is zero, from without error signal, it is contemplated that TEM10 mould is that two valves are ellipse
The characteristic of Dapple, the interference of a valve of TEM00 mould and TEM10 mould is used only in we, i.e., to the direction x from-∞ to 0 or from 0
It is integrated to+∞.
Or
The image of theoretical error signal is as shown in Figure 4.
It is different from the prior art, TEM10 is utilized in the laser frequency stabilisation device based on spatial model interference of the utility model
Mould is the characteristic of two valve ellipse spots, and a barrier is added in the reflection light field of optical resonator and blocks the one of the reflected beams
Half, using the interference of a valve of TEM10 mould and TEM00 mould as error signal, after the processing of servo-control system
It is loaded on the piezoelectric ceramics (PZT) of optical resonator, to achieve the purpose that frequency stabilization.The utility model based on spatial model
The laser frequency stabilisation device of interference is simple and convenient, the operation without carrying out phase-modulation and demodulation filtering to light field, reduces system
Complexity improves the reliability of system；System structure is simple, easy to operate, and compact-sized, at low cost and frequency stabilization effect is good
It is good.
The foregoing is merely the embodiments of the present invention, and therefore it does not limit the scope of the patent of the utility model, all
It is equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, directly or indirectly uses
In other related technical areas, it is also included in the patent protection scope of the utility model.
Claims (6)
1. a kind of laser frequency stabilisation device based on spatial model interference, which is characterized in that including：
Single longitudinal mode laser, optical resonator, light beam baffle and single pixel direct current photodetector；
Wherein, the single longitudinal mode laser, optical resonator, light beam baffle and single pixel direct current photodetector are set to a finger
On fixed laser optical path；The single longitudinal mode laser generates laser beam, and laser beam is emitted to the optical resonator,
Processing of the laser beam through optical resonator, treated, and laser beam is emitted to the single pixel direct current photodetector, institute
Light beam baffle plate setting is stated in the optical path between the optical resonator and the single pixel direct current photodetector, will locate
Laser beam after reason is divided into first laser ray and second laser ray, and stops first laser ray, penetrates second laser
Line injects the single pixel direct current photodetector.
2. the laser frequency stabilisation device according to claim 1 based on spatial model interference, which is characterized in that further include optics
Isolator, the optical isolator is set in the optical path between the single longitudinal mode laser and optical resonator, to prevent
Laser beam is reflected back the single longitudinal mode laser.
3. the laser frequency stabilisation device according to claim 1 based on spatial model interference, which is characterized in that the optics is humorous
The chamber that shakes includes the first high reflective mirror and the second high reflective mirror, what laser entered after optical resonator through the first high reflective mirror and the second high reflective mirror
Reflection and or projection inject to the single pixel direct current photodetector being arranged in optical path.
4. the laser frequency stabilisation device according to claim 3 based on spatial model interference, which is characterized in that high anti-from first
The light beam baffle is set on the laser optical path that mirror goes out.
5. the laser frequency stabilisation device according to claim 3 based on spatial model interference, which is characterized in that further include servo
Control system, the servo-control system include proportional integral circuit, high-voltage amplifier and function generator, the proportional integration
The single pixel direct current photodetector being arranged on the laser optical path that first high reflective mirror described in circuit connection projects, the high voltage amplifier
Device connects the piezoelectric ceramics of the proportional integral circuit and optical resonator, and the function generator connects the high voltage amplifier
Device.
6. the laser frequency stabilisation device according to claim 5 based on spatial model interference, which is characterized in that the single longitudinal mode
Reflecting mirror is set between laser, optical isolator, optical resonator, light beam baffle and single pixel direct current photodetector, with
Extend the transmission optical path of laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820526476.2U CN208142528U (en) | 2018-04-13 | 2018-04-13 | A kind of laser frequency stabilisation device based on spatial model interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820526476.2U CN208142528U (en) | 2018-04-13 | 2018-04-13 | A kind of laser frequency stabilisation device based on spatial model interference |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208142528U true CN208142528U (en) | 2018-11-23 |
Family
ID=64292853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820526476.2U Expired - Fee Related CN208142528U (en) | 2018-04-13 | 2018-04-13 | A kind of laser frequency stabilisation device based on spatial model interference |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208142528U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111555100A (en) * | 2020-04-29 | 2020-08-18 | 山西大学 | Device and method for generating high-order transverse mode compression light by utilizing three-mode opto-mechanical system |
| CN112762860A (en) * | 2020-12-28 | 2021-05-07 | 电子科技大学 | High frame rate sine fringe field projection module |
-
2018
- 2018-04-13 CN CN201820526476.2U patent/CN208142528U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111555100A (en) * | 2020-04-29 | 2020-08-18 | 山西大学 | Device and method for generating high-order transverse mode compression light by utilizing three-mode opto-mechanical system |
| CN112762860A (en) * | 2020-12-28 | 2021-05-07 | 电子科技大学 | High frame rate sine fringe field projection module |
| CN112762860B (en) * | 2020-12-28 | 2022-03-15 | 电子科技大学 | High frame rate sine fringe field projection module |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9337619B2 (en) | Swept frequency laser for FD OCT with intracavity element and method of operation | |
| US9800019B2 (en) | System and method for stabilizing mode locked swept laser for OCT medical imaging | |
| CN208142528U (en) | A kind of laser frequency stabilisation device based on spatial model interference | |
| CN106123886A (en) | A kind of laser gyro ring resonator beam path alignment device and method | |
| CN112542757A (en) | Faraday laser locked by cavity film of resonant cavity and preparation method thereof | |
| CN103018747A (en) | Laser self-mixing distance measuring system based on uncollimated feedback external cavity | |
| JP3460724B2 (en) | Optical oscillator | |
| CN110165547A (en) | A kind of laser frequency stabilisation device and method | |
| EP0390525B1 (en) | An optical pumping-type solid-state laser apparatus with a semiconductor laser device | |
| US20230400559A1 (en) | Detection apparatus, lidar, chip, and terminal device | |
| CN107425409A (en) | Mode-locked laser and optical system | |
| CN109494563A (en) | The laser light source of DOE optics coherence tomography based on annular chamber active light feedback | |
| JP4508352B2 (en) | Optical space transmission system | |
| JPS60238776A (en) | Light wave range finder | |
| CN207116907U (en) | Mode-locked laser and optical system | |
| CN112945108A (en) | Electro-optical modulation sideband-based precise displacement measurement method and device | |
| CN208092416U (en) | Laser module, laser light source and laser projection device | |
| JPH05323029A (en) | Distance measuring method by light wave range finder | |
| CN207116905U (en) | Optical fiber laser and optical system | |
| CN111585168A (en) | Laser frequency stabilization system and method based on differential saturated absorption spectrum | |
| CN215989636U (en) | Narrow linewidth laser beam splitting device | |
| US5081710A (en) | Laser transmitter | |
| WO2023077801A1 (en) | Laser radar | |
| JP4589620B2 (en) | Optical wavelength reference equipment | |
| CN113916811A (en) | Method for interference suppression in resonance type absorption cavity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181123 Termination date: 20210413 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |