CN205429416U - Laser instrument with high stability - Google Patents
Laser instrument with high stability Download PDFInfo
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- CN205429416U CN205429416U CN201520923975.1U CN201520923975U CN205429416U CN 205429416 U CN205429416 U CN 205429416U CN 201520923975 U CN201520923975 U CN 201520923975U CN 205429416 U CN205429416 U CN 205429416U
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Abstract
The utility model discloses a laser instrument with high stability belongs to laser instrument technical field. The laser instrument includes: laser pipe, piezo electric crystal driver, branch slide, photoswitch, resonant cavity, synchronous detection unit, low -frequency modulation ware, interferometer, data processing unit and temperature compensating unit, divide the slide setting to be in in the laser output light path of laser pipe, just divide the slide branch the laser that the laser pipe produced obtains two light path branches, the photoswitch the resonant cavity with the synchronous detection unit sets gradually in the light path branch in two light path branches, the interferometer sets up in another light path branch in two light path branches, the low -frequency modulation ware simultaneously with the photoswitch and synchronous detection unit electricity is connected, the data processing unit with the interferometer electricity is connected, the piezo electric crystal driver simultaneously with the synchronous detection unit the data processing unit and temperature compensating unit electricity is connected.
Description
Technical field
This utility model relates to field of laser device technology, particularly to a kind of laser instrument with high stability.
Background technology
Semiconductor laser is a kind of light supply apparatus with plurality of advantages, as little in volume, simple in construction, monochromaticity are good, coherence is good, working power voltage is low, thus semiconductor laser plays the most important role in fields such as communication, quantum physics, printing, machinery, medical treatment.Particularly in terms of the basic physics researchs such as quantum physics, semiconductor laser has played indispensable significant role especially.
But in quantum physics field, the frequency stability of noise spectra of semiconductor lasers output signal requires the highest, in order to ensure the frequency stability of semiconductor laser output signal, prior art generally improves the frequency stability of semiconductor laser by the working condition controlling semiconductor laser, as controlled the operating temperature of semiconductor laser.
Even if the above-mentioned working condition control of noise spectra of semiconductor lasers is the best, the frequency stability of semiconductor laser output signal is the most not ideal, does not reaches the application requirement in the fields such as high-end experiment, scientific research.
Utility model content
In order to solve problem of the prior art, this utility model embodiment provides a kind of laser instrument with high stability.Described technical scheme is as follows:
This utility model embodiment provides a kind of laser instrument with high stability, and described laser instrument includes: laser tube, piezoquartz driver, light splitting piece, photoswitch, resonator cavity, synchronous detection unit, low frequency modulations device, interferometer, data processing unit and temperature compensation unit；
Described light splitting piece is arranged on the laser output light path of described laser tube, and the described light splitting piece laser that divides described laser tube to produce obtains Liang Ge light path branch, described photoswitch, described resonator cavity and described synchronous detection unit are successively set in a light path branch in said two light path branch, and described interferometer is arranged in another light path branch in said two light path branch；
Described low frequency modulations device electrically connects with described photoswitch and described synchronous detection unit simultaneously, described data processing unit electrically connects with described interferometer, and described piezoquartz driver electrically connects with described synchronous detection unit, described data processing unit and described temperature compensation unit simultaneously.
In a kind of implementation of this utility model embodiment, described photoswitch is acousto-optic modulator.
In the another kind of implementation of this utility model embodiment, described resonator cavity includes steeping equipped with the absorption of 87Rb atom.
In the another kind of implementation of this utility model embodiment, described temperature compensation unit includes:
Temperature conversion circuit, differential amplifier circuit and gain adjusting circuit, described differential amplifier circuit electrically connects with described temperature conversion circuit and described gain adjusting circuit respectively.
Another kind of implementation in this utility model embodiment, described temperature conversion circuit includes electric bridge, described electric bridge includes critesistor Rk, resistance R0 and two resistance R, the resistance value of described resistance R0 is corresponding with described reference work temperature, and the temperature coefficient of described resistance R0 is identical with described critesistor Rk.
nullAnother kind of implementation in this utility model embodiment，Described differential amplifier circuit includes the first operational amplifier A 1、Second operational amplifier A 2、3rd operational amplifier A 3、Two the first resistance R1、Two the second resistance R2，The in-phase input end of described first operational amplifier A 1 is connected between described resistance R0 and described resistance R，The inverting input of described first operational amplifier A 1 is connected with the outfan of described first operational amplifier A 1，The in-phase input end of described second operational amplifier A 2 is connected between described critesistor Rk and described resistance R，The inverting input of described second operational amplifier A 2 is connected with the outfan of described second operational amplifier A 2，The inverting input of described 3rd operational amplifier A 3 is connected with the outfan of described first operational amplifier A 1 by a first resistance R1 in said two the first resistance R1，The in-phase input end of described 3rd operational amplifier A 3 is connected with the outfan of described second operational amplifier A 2 by another the first resistance R1 in said two the first resistance R1，The reverse input end of described 3rd operational amplifier A 3 is also by a second resistance R2 ground connection in said two the second resistance R2，The in-phase input end of described 3rd operational amplifier A 3 is connected with the outfan of described 3rd operational amplifier A 3 also by another the second resistance R2 in said two the second resistance R2，The outfan of described 3rd operational amplifier A 3 also electrically connects with piezoquartz driver.
Another kind of implementation in this utility model embodiment, described gain adjusting circuit includes the 3rd resistance R3, rheostat R4 and four-operational amplifier A4, described 3rd resistance R3 and described rheostat R4 series connection, described 3rd resistance R3 and described rheostat R4 is connected between described second resistance R2 and the outfan of described 3rd operational amplifier A 3 being connected with the in-phase input end of described 3rd operational amplifier A 3, the outfan of described four-operational amplifier A4 and reverse input end are connected to the two ends of described 3rd resistance R3, the in-phase input end ground connection of described four-operational amplifier A4.
In the another kind of implementation of this utility model embodiment, described piezoquartz driver includes:
Three varactors and starting of oscillation subcircuit, the input of described three varactors connects described synchronous detection unit, described synchronous detection unit and the outfan of described temperature compensation unit respectively, and the outfan of described three varactors is simultaneously connected with described piezoquartz driver.
In the another kind of implementation of this utility model embodiment, described piezoquartz driver also includes that constant temperature control circuit, described constant temperature control circuit electrically connect with described starting of oscillation subcircuit.
In the another kind of implementation of this utility model embodiment, described laser instrument also includes that absorption chamber, described absorption chamber are located in the light path between described laser tube and described light splitting piece.
The technical scheme that this utility model embodiment provides has the benefit that
The laser of laser tube output is divided into two-way by light splitting piece, one tunnel produces the first deviation correcting signal via resonator cavity and synchronous detection unit, another road produces the second deviation correcting signal via interferometer and data processing unit, the 3rd deviation correcting signal is produced according to temperature again by temperature compensation unit, above three deviation correcting signal acts on laser tube by piezoquartz driver simultaneously, to ensure the frequency stability of laser output signal, specifically: the first deviation correcting signal produces according to the atomic transition frequency in resonator cavity, therefore can ensure that the short-term stability of laser output signal, second deviation correcting signal produces according to the optical frequency measurement of interferometer, can ensure that the long-time stability of laser output signal, 3rd deviation correcting signal produces according to operating ambient temperature, ensure that the most influenced by ambient temperature of laser output signal.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme in this utility model embodiment, in describing embodiment below, the required accompanying drawing used is briefly described, apparently, accompanying drawing in describing below is only embodiments more of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of laser instrument with high stability that this utility model embodiment provides；
Fig. 2 is the structural representation of a kind of temperature compensation unit that this utility model embodiment provides；
Fig. 3 is the structural representation of a kind of piezoquartz driver that this utility model embodiment provides.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing, this utility model embodiment is described in further detail.
Fig. 1 is the structural representation of a kind of laser instrument with high stability that this utility model embodiment provides, seeing Fig. 1, laser instrument includes: laser tube 10, piezoquartz driver 20, light splitting piece 30, photoswitch 40, resonator cavity 50, synchronous detection unit 60, low frequency modulations device 70, interferometer 80, data processing unit 90 and temperature compensation unit 100；
Light splitting piece 30 is arranged on the laser output light path of laser tube 10, and the laser that light splitting piece 30 shunt excitation light pipe 10 produces obtains Liang Ge light path branch, photoswitch 40, resonator cavity 50 and synchronous detection unit 60 are successively set in a light path branch in Liang Ge light path branch, and interferometer 80 is arranged in another light path branch in Liang Ge light path branch；
Low frequency modulations device 70, for producing the clock signal controlling photoswitch 40 and the synchronous reference signal with clock signal same frequency homophase；
Synchronous detection unit 60, for the optical signal through resonator cavity 50 is carried out Photoelectric Detection, obtains photoelectric detecting signal；Use photoelectric detecting signal to carry out Tong Bu phase demodulation with synchronous reference signal, produce the first deviation correcting signal and export in piezoquartz driver 20；
Data processing unit 90, produces the second deviation correcting signal for the detection signal (DC level signal) produced according to interferometer 80, and the second deviation correcting signal is exported in piezoquartz driver 20；
Temperature compensation unit 100, for producing the 3rd deviation correcting signal according to operating ambient temperature, and exports the 3rd deviation correcting signal in piezoquartz driver 20；
Piezoquartz driver 20, for driving laser tube 10 to work under the effect of the first deviation correcting signal, the second deviation correcting signal and the 3rd deviation correcting signal.
Low frequency modulations device 70 electrically connects with photoswitch 40 and synchronous detection unit 60 simultaneously, and data processing unit 90 electrically connects with interferometer 80, and piezoquartz driver 20 electrically connects with synchronous detection unit 60, data processing unit 90 and temperature compensation unit 100 simultaneously.
nullIn the present embodiment，The laser of laser tube output is divided into two-way by light splitting piece，One tunnel produces the first deviation correcting signal via resonator cavity and synchronous detection unit，Another road produces the second deviation correcting signal via interferometer and data processing unit，The 3rd deviation correcting signal is produced according to temperature again by temperature compensation unit，Above three deviation correcting signal is acted on laser tube by piezoquartz driver simultaneously，To ensure the frequency stability of laser output signal，Specifically: the first deviation correcting signal produces according to the atomic transition frequency in resonator cavity，Therefore can ensure that the short-term stability of laser output signal，Second deviation correcting signal produces according to the optical frequency measurement of interferometer，Can ensure that the long-time stability of laser output signal，3rd deviation correcting signal produces according to operating ambient temperature，Ensure that the most influenced by ambient temperature of laser output signal.
Alternatively, photoswitch 40 is acousto-optic modulator.
Alternatively, resonator cavity 50 includes steeping equipped with the absorption of 87Rb atom.
Fig. 2 is the structural representation of a kind of temperature compensation unit 100 that this utility model embodiment provides, and sees Fig. 2, and temperature compensation unit 100 includes:
Temperature conversion circuit 101, for being converted to voltage difference by the difference of operating ambient temperature Yu reference work temperature；
Differential amplifier circuit 102, for voltage difference is carried out differential amplification, obtains the 3rd correction voltage；
Gain adjusting circuit 103, for regulating the yield value of differential amplifier circuit 102.
Differential amplifier circuit 102 electrically connects with temperature conversion circuit 101 and described gain adjusting circuit 103 respectively.
Referring again to Fig. 2, temperature conversion circuit 101 includes that electric bridge, electric bridge include critesistor Rk, resistance R0 and two resistance R, and the resistance value of resistance R0 is corresponding with reference work temperature, and the temperature coefficient of resistance R0 is identical with critesistor Rk.What the resistance of resistance R0 represented is reference work temperature.Critesistor Rk can be affixed on the surface of laser tube 10, operating ambient temperature when working in order to perception laser tube 10.Therefore when the operating ambient temperature of laser tube 10 is unchanged, in Fig. 2, electric bridge is in balance.The operating ambient temperature of laser tube 10 raises (reduction), then the resistance of critesistor Rk will diminish (becoming big), then electric bridge two ends exist voltage difference, can produce correction voltage through differential amplifier circuit 102 and gain adjusting circuit 103.
nullRefer again to Fig. 2，Differential amplifier circuit 102 includes the first operational amplifier A 1、Second operational amplifier A 2、3rd operational amplifier A 3、Two the first resistance R1、Two the second resistance R2，The in-phase input end of the first operational amplifier A 1 is connected between resistance R0 and resistance R，The inverting input of the first operational amplifier A 1 and the outfan of the first operational amplifier A 1 connect，The in-phase input end of the second operational amplifier A 2 is connected between critesistor Rk and resistance R，The inverting input of the second operational amplifier A 2 and the outfan of the second operational amplifier A 2 connect，The inverting input of the 3rd operational amplifier A 3 is connected by the outfan of a first resistance R1 in two the first resistance R1 and the first operational amplifier A 1，The in-phase input end of the 3rd operational amplifier A 3 is connected by the outfan of another the first resistance R1 in two the first resistance R1 and the second operational amplifier A 2，The reverse input end of the 3rd operational amplifier A 3 is also by a second resistance R2 ground connection in two the second resistance R2，The in-phase input end of the 3rd operational amplifier A 3 connects also by the outfan of another the second resistance R2 in two the second resistance R2 and the 3rd operational amplifier A 3，The outfan of the 3rd operational amplifier A 3 also electrically connects with piezoquartz driver 20.
Refer again to Fig. 2, gain adjusting circuit 103 includes the 3rd resistance R3, rheostat R4 and four-operational amplifier A4,3rd resistance R3 and rheostat R4 series connection, 3rd resistance R3 and rheostat R4 is connected between the second resistance R2 and the outfan of the 3rd operational amplifier A 3 being connected with the in-phase input end of the 3rd operational amplifier A 3, the outfan of four-operational amplifier A4 and reverse input end are connected to the two ends of the 3rd resistance R3, the in-phase input end ground connection of four-operational amplifier A4.
Fig. 3 is the structural representation of a kind of piezoquartz driver 20 that this utility model embodiment provides, and sees Fig. 3, and piezoquartz driver 20 includes:
Three varactor (D1, D2 and D3) and starting of oscillation subcircuit 201, the input of three varactors connects synchronous detection unit 60, synchronous detection unit 60 and the outfan of temperature compensation unit 100 respectively, and the outfan of three varactors is simultaneously connected with piezoquartz driver 20.
Wherein, varactor is according to the different different capacitances of input voltage output, thus finely tunes the output signal frequency value of starting of oscillation subcircuit.
Referring again to Fig. 3, piezoquartz driver 20 also includes that constant temperature control circuit 202, constant temperature control circuit 202 electrically connect with starting of oscillation subcircuit 201.Preferably, constant temperature control circuit 202 can be realized by temperature supplementary units 100, and specific implementation does not repeats.
Referring again to Fig. 1, laser instrument also includes that absorption chamber 110, absorption chamber 110 are located in the light path between laser tube 10 and light splitting piece 30, and absorption chamber 110 is for selecting the laser signal of setpoint frequency from the laser of laser tube output, to ensure the degree of accuracy of subsequent treatment.
One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can be completed by hardware, relevant hardware can also be instructed by program to complete, described program can be stored in a kind of computer-readable recording medium, storage medium mentioned above can be read only memory, disk or CD etc..
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all within spirit of the present utility model and principle, any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.
Claims (10)
1. a laser instrument with high stability, it is characterized in that, described laser instrument includes: laser tube, piezoquartz driver, light splitting piece, photoswitch, resonator cavity, synchronous detection unit, low frequency modulations device, interferometer, data processing unit and temperature compensation unit；
Described light splitting piece is arranged on the laser output light path of described laser tube, and the described light splitting piece laser that divides described laser tube to produce obtains Liang Ge light path branch, described photoswitch, described resonator cavity and described synchronous detection unit are successively set in a light path branch in said two light path branch, and described interferometer is arranged in another light path branch in said two light path branch；
Described low frequency modulations device electrically connects with described photoswitch and described synchronous detection unit simultaneously, described data processing unit electrically connects with described interferometer, and described piezoquartz driver electrically connects with described synchronous detection unit, described data processing unit and described temperature compensation unit simultaneously.
Laser instrument the most according to claim 1, it is characterised in that described photoswitch is acousto-optic modulator.
Laser instrument the most according to claim 1, it is characterised in that described resonator cavity include equipped with87The absorption bubble of Rb atom.
Laser instrument the most according to claim 1, it is characterised in that described temperature compensation unit includes:
Temperature conversion circuit, differential amplifier circuit and gain adjusting circuit, described differential amplifier circuit electrically connects with described temperature conversion circuit and described gain adjusting circuit respectively.
Laser instrument the most according to claim 4, it is characterized in that, described temperature conversion circuit includes electric bridge, described electric bridge includes critesistor Rk, resistance R0 and two resistance R, the resistance value of described resistance R0 is corresponding with reference work temperature, and the temperature coefficient of described resistance R0 is identical with described critesistor Rk.
nullLaser instrument the most according to claim 5，It is characterized in that，Described differential amplifier circuit includes the first operational amplifier A 1、Second operational amplifier A 2、3rd operational amplifier A 3、Two the first resistance R1、Two the second resistance R2，The in-phase input end of described first operational amplifier A 1 is connected between described resistance R0 and described resistance R，The inverting input of described first operational amplifier A 1 is connected with the outfan of described first operational amplifier A 1，The in-phase input end of described second operational amplifier A 2 is connected between described critesistor Rk and described resistance R，The inverting input of described second operational amplifier A 2 is connected with the outfan of described second operational amplifier A 2，The inverting input of described 3rd operational amplifier A 3 is connected with the outfan of described first operational amplifier A 1 by a first resistance R1 in said two the first resistance R1，The in-phase input end of described 3rd operational amplifier A 3 is connected with the outfan of described second operational amplifier A 2 by another the first resistance R1 in said two the first resistance R1，The reverse input end of described 3rd operational amplifier A 3 is also by a second resistance R2 ground connection in said two the second resistance R2，The in-phase input end of described 3rd operational amplifier A 3 is connected with the outfan of described 3rd operational amplifier A 3 also by another the second resistance R2 in said two the second resistance R2，The outfan of described 3rd operational amplifier A 3 also electrically connects with piezoquartz driver.
Laser instrument the most according to claim 6, it is characterized in that, described gain adjusting circuit includes the 3rd resistance R3, rheostat R4 and four-operational amplifier A4, described 3rd resistance R3 and described rheostat R4 series connection, described 3rd resistance R3 and described rheostat R4 is connected between described second resistance R2 and the outfan of described 3rd operational amplifier A 3 being connected with the in-phase input end of described 3rd operational amplifier A 3, the outfan of described four-operational amplifier A4 and reverse input end are connected to the two ends of described 3rd resistance R3, the in-phase input end ground connection of described four-operational amplifier A4.
Laser instrument the most according to claim 1, it is characterised in that described piezoquartz driver includes:
Three varactors and starting of oscillation subcircuit, the input of described three varactors connects described synchronous detection unit, described synchronous detection unit and the outfan of described temperature compensation unit respectively, and the outfan of described three varactors is simultaneously connected with described piezoquartz driver.
Laser instrument the most according to claim 8, it is characterised in that described piezoquartz driver also includes that constant temperature control circuit, described constant temperature control circuit electrically connect with described starting of oscillation subcircuit.
Laser instrument the most according to claim 1, it is characterised in that described laser instrument also includes that absorption chamber, described absorption chamber are located in the light path between described laser tube and described light splitting piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520923975.1U CN205429416U (en) | 2015-11-19 | 2015-11-19 | Laser instrument with high stability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520923975.1U CN205429416U (en) | 2015-11-19 | 2015-11-19 | Laser instrument with high stability |
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| Publication Number | Publication Date |
|---|---|
| CN205429416U true CN205429416U (en) | 2016-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520923975.1U Expired - Fee Related CN205429416U (en) | 2015-11-19 | 2015-11-19 | Laser instrument with high stability |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107248696A (en) * | 2017-06-15 | 2017-10-13 | 江汉大学 | A kind of self-compensation type semiconductor laser |
| CN118539269A (en) * | 2024-07-26 | 2024-08-23 | 成都光创联科技有限公司 | Fine control circuit for laser current |
-
2015
- 2015-11-19 CN CN201520923975.1U patent/CN205429416U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107248696A (en) * | 2017-06-15 | 2017-10-13 | 江汉大学 | A kind of self-compensation type semiconductor laser |
| CN118539269A (en) * | 2024-07-26 | 2024-08-23 | 成都光创联科技有限公司 | Fine control circuit for laser current |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160803 Termination date: 20181119 |