CN202759150U - Frequency stabilization device used for improving laser long-term stabilization degree - Google Patents
Frequency stabilization device used for improving laser long-term stabilization degree Download PDFInfo
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- CN202759150U CN202759150U CN 201220359178 CN201220359178U CN202759150U CN 202759150 U CN202759150 U CN 202759150U CN 201220359178 CN201220359178 CN 201220359178 CN 201220359178 U CN201220359178 U CN 201220359178U CN 202759150 U CN202759150 U CN 202759150U
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Abstract
The utility model discloses a frequency stabilization device used for improving a laser long-term stabilization degree, belonging to the laser technology field. The frequency stabilization device used for improving the laser long-term stabilization degree comprises a passive cavity used for the passing of a laser beam of a laser, an photoelectric detection module used for detecting the laser beam intensity penetrating the passive cavity and outputting a photodetection signal, a modulation signal generator used for generating a synchronization reference signal and a modulation signal, a phase detection module used for employing the synchronization reference signal to carry out phase detection on the photodetection signal and outputting a rectifying voltage, and a piezoelectric crystal driver used for adjusting the laser beam frequency of the laser according to the rectifying voltage. The phase detection module is electrically connected with the photoelectric detection module and the piezoelectric crystal driver separately, and the modulation signal generator is electrically connected with the phase detection module and the piezoelectric crystal driver separately. The frequency stabilization device used for improving the laser long-term stabilization degree of the utility model enables the long-term stabilization degree of a laser output frequency to be improved.
Description
Technical field
The utility model relates to the laser technique field, particularly a kind of frequency regulator for improving the laser long-term stability.
Background technology
Laser is the device that utilizes the stimulated radiation principle that light is amplified in the material that some is stimulated or vibrate and launch.Because tiny, the good directionality of laser beam and with huge power, laser is widely used in the each side such as industry, agricultural, accurate measurement and detection, communication and information processing, medical treatment, military affairs.
Along with the range of application of laser is more and more extensive, more and more higher to the long-term stability requirement of laser output frequency.Prior art provides a kind of device that improves the laser long-term stability.That this device comprises is heat sink, temperature controller and observation module.The heat sink gain medium that places laser of holding, and with the gain medium thermo-contact; Temperature controller and heat sink thermo-contact, the temperature of indirect regulation gain medium; The observation module is connected with temperature controller, is used for measuring laser output frequency, and adjusts the temperature of temperature controller according to laser output frequency.
In realizing process of the present utility model, the inventor finds that there is following problem at least in prior art:
Laser itself has certain accuracy limitations to the ambient temperature of gain medium, and the temperature of prior art control gain medium only improves the laser long-term stability in the scope of certain precision.For the very high high accuracy equipment such as gravity gradiometer of laser frequency stability required precision, prior art can't satisfy the requirement of its high-precision laser frequency stabilization.
The utility model content
In order further to improve the long-term stability of laser output frequency, the utility model embodiment provides a kind of frequency regulator for improving the laser long-term stability.Described technical scheme is as follows:
A kind of frequency regulator for improving the laser long-term stability, described device comprises:
Be used for the passive cavity that the laser beam for laser passes through, be used for surveying the intensity of the laser beam that sees through described passive cavity and export the Photoelectric Detection module that light is examined signal, modulation signal generator for generation of synchronous reference signal and modulation signal, be used for adopting described synchronous reference signal described light inspection signal to be carried out the phase detection module of phase-detection and output correction voltage, and the piezoelectric crystal driver of frequency that is used for adjusting according to described correction voltage the laser beam of described laser; Described phase detection module respectively with described Photoelectric Detection module be connected the piezoelectric crystal actuator electrical and be connected; Described modulation signal generator respectively with described phase detection module be connected the piezoelectric crystal actuator electrical and be connected.
Wherein, described device also comprises:
Be used for that the modulation signal that described modulation signal generator is exported is carried out first three frequency division and put on again described piezoelectric crystal driver frequency divider; Described frequency divider is connected between described modulation signal generator and the described piezoelectric crystal driver.
Particularly, described Photoelectric Detection module is photomultiplier.
Wherein, described laser comprises the laser tube of generation and Output of laser light beam; Described laser tube comprise for amplify or the described laser that vibrates to control the chamber mirror of described Laser output direction and frequency; Described piezoelectric crystal driver is the piezoelectric ceramic piece that is installed on the mirror of described chamber.
The beneficial effect that the technical scheme that the utility model embodiment provides is brought is: the laser signal of selecting preset frequency by passive cavity from described laser beam; The laser signal intensity that Photoelectric Detection module detection passive cavity is selected is also exported light inspection signal, and modulation signal generator produces synchronous reference signal; Phase detection module is carried out phase-detection and output correction voltage according to synchronous reference signal to light inspection signal, and the piezoelectric crystal driver is adjusted the frequency of laser Output of laser according to correction voltage; Can initiatively carry out the stable of frequency based on the laser peripheral circuit to laser, the accuracy limitations of Stimulated Light device itself has not improved the long-term stability of the output frequency of laser, satisfies the demand of high precision apparatus.
Description of drawings
In order to be illustrated more clearly in the technical scheme among the utility model embodiment, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the schematic diagram of a kind of frequency regulator for improving the laser long-term stability of providing among the utility model embodiment.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing the utility model execution mode is described in further detail.
Embodiment
Referring to Fig. 1, the utility model embodiment provides a kind of frequency regulator for improving the laser long-term stability.This laser comprises the laser tube 1 of generation and Output of laser light beam.Wherein, this device comprises:
Be used for passive cavity 2 that the laser beam for laser passes through, be used for surveying the intensity of the laser beam that sees through passive cavity 2 and export the Photoelectric Detection module 3 of light inspection signal, for generation of the modulation signal generator 4 of synchronous reference signal and modulation signal, be used for adopting synchronous reference signal that light inspection signal is carried out the mutually detection module 5 of phase-detection and output correction voltage and the piezoelectric crystal driver 7 that is used for adjusting according to correction voltage the frequency of this laser beam.Wherein, phase detection module 5 is electrically connected with Photoelectric Detection module 3 and piezoelectric crystal driver 7 respectively; Modulation signal generator 4 is electrically connected with phase detection module 5 and piezoelectric crystal driver 7 respectively.
Particularly, laser tube 1 is traditional LASER Light Source, in order to produce laser beam.Usually, laser tube 1 comprise under incentive action, realize population inversion with the gain medium that produces Laser output, be used for providing the pumping source of the energy that produces incentive action and be used for amplifying or oscillating laser with the chamber mirror of control Laser output direction and frequency.This is prior art, no longer describes in detail.
Wherein, piezoelectric crystal driver 7 can be mounted in the piezoelectric ceramic piece on the laser tube 1 lumen mirror.Because its electrostrictive properties when being applied in the difference correction voltage of phase detection module 5 outputs at it, can making the chamber long hair in the laser tube 1 give birth to change, thereby cause the variation of laser beam output frequency, finally realizes the stable of laser tube 1 output frequency signal.
Particularly, passive cavity 2 is a metal spiral cavity, is used for the laser beam of injecting is carried out frequency-selecting output.The laser beam frequency of supposing laser tube 1 output is f '; The centre frequency of passive cavity 2 is f; Then passive cavity 2 will be injected the laser signal output that wherein frequency meets f.
Particularly, Photoelectric Detection module 3 detects the intensity of the laser beam that sees through passive cavity 2, and output light inspection signal.This Photoelectric Detection module 3 can be photomultiplier.
Particularly, modulation signal generator 4 for generation of low frequency signal respectively to phase detection module 5 and piezoelectric crystal driver 7.
Particularly, phase detection module 5 is a phase detection device, and the low frequency signal that is used for modulation signal generator 4 is produced is examined signal as phase discrimination signal as synchronous reference signal with the second light, respectively both are carried out phase-detection, and output correction voltage is to piezoelectric crystal driver 7.Thereby cause the variation of the output frequency of laser tube 1, improve the long-term stability of the output signal frequency of laser tube 1.
Wherein, this device also comprises frequency divider 6, and this frequency divider 6 is connected between modulation signal generator 4 and the piezoelectric crystal driver 7, is used for the modulation signal of modulation signal generator 4 outputs is carried out first three frequency division, puts on piezoelectric crystal driver 7 again.Consider that there is the not single situation of frequency in the core point of laser system own, the modulation signal that has added 6 pairs of inputs of frequency divider piezoelectric crystal driver 7 carries out three frequency division, can well eliminate like this impact of laser background.
The beneficial effect that the technical scheme that the utility model embodiment provides is brought is: the laser signal of selecting preset frequency by passive cavity from described laser beam; The laser signal intensity that Photoelectric Detection module detection passive cavity is selected is also exported light inspection signal, and modulation signal generator produces synchronous reference signal; Phase detection module is carried out phase-detection and output correction voltage according to synchronous reference signal to light inspection signal, and the piezoelectric crystal driver is adjusted the frequency of laser Output of laser according to correction voltage; Can initiatively carry out the stable of frequency based on the laser peripheral circuit to laser, the accuracy limitations of Stimulated Light device itself has not improved the long-term stability of the output frequency of laser, satisfies the demand of high precision apparatus.
The above only is preferred embodiment of the present utility model, and is in order to limit the utility model, not all within spirit of the present utility model and principle, any modification of doing, is equal to replacement, improvement etc., all should be included within the protection range of the present utility model.
Claims (4)
1. a frequency regulator that is used for improving the laser long-term stability is characterized in that, described device comprises:
Be used for the passive cavity that the laser beam for laser passes through, be used for surveying the intensity of the laser beam that sees through described passive cavity and export the Photoelectric Detection module that light is examined signal, modulation signal generator for generation of synchronous reference signal and modulation signal, be used for adopting described synchronous reference signal described light inspection signal to be carried out the phase detection module of phase-detection and output correction voltage, and the piezoelectric crystal driver of frequency that is used for adjusting according to described correction voltage the laser beam of described laser; Described phase detection module respectively with described Photoelectric Detection module be connected the piezoelectric crystal actuator electrical and be connected; Described modulation signal generator respectively with described phase detection module be connected the piezoelectric crystal actuator electrical and be connected.
2. device according to claim 1 is characterized in that, described device also comprises:
Be used for that the modulation signal that described modulation signal generator is exported is carried out first three frequency division and put on again described piezoelectric crystal driver frequency divider; Described frequency divider is connected between described modulation signal generator and the described piezoelectric crystal driver.
3. device according to claim 1 is characterized in that, described Photoelectric Detection module is photomultiplier.
4. device according to claim 1 is characterized in that, described laser comprises the laser tube of generation and Output of laser light beam; Described laser tube comprise for amplify or the described laser that vibrates to control the chamber mirror of described Laser output direction and frequency; Described piezoelectric crystal driver is the piezoelectric ceramic piece that is installed on the mirror of described chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220359178 CN202759150U (en) | 2012-07-23 | 2012-07-23 | Frequency stabilization device used for improving laser long-term stabilization degree |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220359178 CN202759150U (en) | 2012-07-23 | 2012-07-23 | Frequency stabilization device used for improving laser long-term stabilization degree |
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| Publication Number | Publication Date |
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| CN202759150U true CN202759150U (en) | 2013-02-27 |
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| CN 201220359178 Expired - Fee Related CN202759150U (en) | 2012-07-23 | 2012-07-23 | Frequency stabilization device used for improving laser long-term stabilization degree |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406347A (en) * | 2015-11-19 | 2016-03-16 | 江汉大学 | Laser device with high stability |
| CN105470803A (en) * | 2015-12-22 | 2016-04-06 | 江汉大学 | Laser frequency stabilizing apparatus |
| CN105490163A (en) * | 2015-11-19 | 2016-04-13 | 江汉大学 | Laser with high frequency locking accuracy |
| CN105490156A (en) * | 2015-11-19 | 2016-04-13 | 江汉大学 | Laser |
-
2012
- 2012-07-23 CN CN 201220359178 patent/CN202759150U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105406347A (en) * | 2015-11-19 | 2016-03-16 | 江汉大学 | Laser device with high stability |
| CN105490163A (en) * | 2015-11-19 | 2016-04-13 | 江汉大学 | Laser with high frequency locking accuracy |
| CN105490156A (en) * | 2015-11-19 | 2016-04-13 | 江汉大学 | Laser |
| CN105490163B (en) * | 2015-11-19 | 2018-11-20 | 江汉大学 | A kind of high frequency locking precision laser |
| CN105490156B (en) * | 2015-11-19 | 2019-06-21 | 江汉大学 | A kind of laser |
| CN105470803A (en) * | 2015-12-22 | 2016-04-06 | 江汉大学 | Laser frequency stabilizing apparatus |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130227 Termination date: 20130723 |