CN105490156B - A kind of laser - Google Patents
A kind of laser Download PDFInfo
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- CN105490156B CN105490156B CN201510799596.0A CN201510799596A CN105490156B CN 105490156 B CN105490156 B CN 105490156B CN 201510799596 A CN201510799596 A CN 201510799596A CN 105490156 B CN105490156 B CN 105490156B
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Abstract
The invention discloses a kind of lasers, belong to field of photoelectric technology.The laser includes laser tube, piezo-electric crystal driver, the first absorption chamber, the second absorption chamber, acousto-optic modulator AOM, low frequency modulations device, synchronous phase discriminator, the laser tube, first absorption chamber, the AOM, second absorption chamber, the synchronous phase discriminator, the piezo-electric crystal driver are sequentially connected, the piezo-electric crystal driver is connect with the laser tube, the low frequency modulations device includes microprocessor interconnected and Direct Digital Frequency Synthesizers DDS, the microprocessor is connected with the synchronous phase discriminator, and the DDS is connect with the AOM.The present invention passes through synchronous phase discriminator and synchronizes phase demodulation generation error signal to the laser signal selected, the laser signal that piezo-electric crystal driver is exported according to error signal adjustment laser tube, finally the output frequency of laser is locked, improves the stability of the output frequency of laser.
Description
Technical field
The present invention relates to field of photoelectric technology, in particular to a kind of laser.
Background technique
Laser is to make light method or device of oscillation transmitting in certain substances being stimulated using stimulated radiation principle
Part.Since laser beam is tiny, good directionality and with huge power, laser is widely used in industry, agricultural, essence
The various aspects such as close measurement and detection, communication and information processing, medical treatment, military affairs.
It is higher and higher to the stability requirement of laser output frequency as will be used wider and wider for laser is general.
The prior art provides a kind of device for improving laser output stability.The device includes heat sink, temperature controller and observation
Module.It is heat sink to hold the laser gain medium being placed in laser, and thermally contacted with laser gain medium；Temperature controller and heat
Heavy thermo-contact, adjusts the temperature of laser gain medium indirectly；Observation module is connect with temperature controller, for measuring laser output
Frequency, and according to the temperature of laser output frequency adjustment temperature controller.
In the implementation of the present invention, the inventor finds that the existing technology has at least the following problems:
Laser itself has certain precision to limit the environment temperature of laser gain medium, and the prior art controls laser and increases
The temperature of beneficial medium only improves laser output stability in the range of certain precision.For laser frequency stability precision
For the high precision apparatus such as exigent gravity gradiometer, the prior art is unable to satisfy the requirement of its high-precision laser frequency stabilization.
Summary of the invention
In order to solve the problems, such as that the prior art is unable to satisfy the requirement of its high-precision laser frequency stabilization, the embodiment of the present invention is provided
A kind of laser.The technical solution is as follows:
The embodiment of the invention provides a kind of laser, the laser includes laser tube, and the laser tube further includes pressure
Transistor driver, the first absorption chamber, the second absorption chamber, acousto-optic modulator AOM, low frequency modulations device, synchronous phase discriminator, it is described to swash
Light pipe, first absorption chamber, the AOM, second absorption chamber, the synchronous phase discriminator, the piezo-electric crystal driver
It is sequentially connected, the piezo-electric crystal driver is connect with the laser tube, and the low frequency modulations device includes micro- place interconnected
Device and Direct Digital Frequency Synthesizers DDS are managed, the microprocessor is connected with the synchronous phase discriminator, the DDS and the AOM
Connection.
Optionally, the synchronous phase discriminator is photomultiplier tube.
Optionally, isotope there are two types of being set in first absorption chamber.
Optionally, isotope there are two types of being set in second absorption chamber.
Optionally, it sets inside the DDS there are two frequency control register, is provided with not in the frequency control register
Same frequency values.
Optionally, the microprocessor and the DDS are connect with the same clock source.
Preferably, the clock source is high steady clock source.
Optionally, the end FSELECT of the DDS is connect with the microprocessor.
Technical solution provided in an embodiment of the present invention has the benefit that
The laser signal of preset frequency, acousto-optic tune are selected from the laser signal that laser tube generates by the first absorption chamber
The laser signal that device processed selects the first absorption chamber is adjusted, and is selected from the laser signal after adjusting by the second absorber
The laser signal of preset frequency out, synchronous phase discriminator synchronize phase demodulation to the laser signal selected, and generation acts on piezo crystals
The error signal of body driver, the laser signal that piezo-electric crystal driver is exported according to error signal adjustment laser tube, finally will
The output frequency of laser locks, and improves the stability of the output frequency of laser, meets the requirement of high precision apparatus.And
Signal source device using laser tube, piezo-electric crystal driver, AOM, absorption chamber, DDS, microprocessor, synchronous phase discriminator these at
Ripe electronic component is realized, is realized simple and convenient, at low cost.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of structural schematic diagram of laser provided in an embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Embodiment
The embodiment of the invention provides a kind of lasers, and referring to Fig. 1, which includes laser tube 1, piezo-electric crystal driving
Device 2, the first absorption chamber 3, the second absorption chamber 4,5, low frequency modulations device (Acousto-optical Modulators, abbreviation AOM)
6, synchronous phase discriminator 7, laser tube 1, the first absorption chamber 3, AOM 5, the second absorption chamber 4, synchronous phase discriminator 7, piezo-electric crystal driving
Device 2 is sequentially connected, and piezo-electric crystal driver 2 is connect with laser tube 1.Low frequency modulations device 6 includes microprocessor 61 interconnected
With Direct Digital Frequency Synthesizers (DDS) 62, microprocessor 61 is connected with synchronous phase discriminator 7, and DDS 62 is connect with AOM 5.
Wherein, laser tube 1 generates laser signal, and the first absorption chamber 3 is selected pre- from the laser signal that laser 1 generates
Determine the laser signal of frequency, the laser signal that AOM 5 selects the first absorption chamber 3 is adjusted, and the second absorption chamber 4 is from AOM 5
The signal of preset frequency, the laser signal that synchronous phase discriminator 7 selects the second absorption chamber 4 are selected in laser signal after adjusting
Phase demodulation is synchronized, generates the error signal for acting on piezo-electric crystal driver 2, piezo-electric crystal driver 2 is according to error signal
The laser signal that laser tube 1 exports is adjusted, finally locks the output frequency of laser, improves the output frequency of laser
Rate stability meets the requirement of high precision apparatus.
Specifically, laser tube 1 can be traditional laser light source, to generate laser beam.Generally, laser
Pipe 1 includes for realizing population inversion under incentive action to generate the laser gain medium of laser output, to provide production
The pumping source of the energy of raw incentive action and for amplifying or oscillating laser is to control the hysteroscope of laser outbound course and frequency.This
For the prior art, no longer it is described in detail.
Piezo-electric crystal driver 2 can be mounted in the piezoelectric ceramic piece in laser tube 1 in hysteroscope.Electroluminescent due to it stretches
Contracting feature can make the chamber length in laser tube 1 change, when it is applied different voltage control signals so as to cause laser light
The variation of beam output frequency, the final stabilization for realizing 1 output frequency signal of laser tube.
It filled with gas in first absorption chamber 3, is filtered with the laser beam exported to laser tube 1, exports preset frequency
Laser signal.The preset frequency is the absorbent core frequency of the gas atom.Specifically, first is injected when laser beam to absorb
When in room 3, on the one hand, frequency will be absorbed not equal to the light of Atomic absorption centre frequency in the first absorption chamber 3 by first in light beam
Room 3 absorbs；On the other hand, frequency will pass through first and inhale equal to the light of Atomic absorption centre frequency in the first absorption chamber 3 in light beam
Room 3 is received, is hardly absorbed.In this way, unwanted laser frequency in laser beam can be filtered out by the first absorption chamber 3
Signal, and select required laser frequency signal.
The structure and principle of second absorption chamber 4 can be identical as the first absorption chamber 3, and this will not be detailed here.
AOM 5 is made of acousto-optic medium and PZT (piezoelectric transducer), when certain special carrier frequency driving piezoelectricity of driving source changes
When energy device, PZT (piezoelectric transducer) is that the ultrasonic wave of generation same frequency is simultaneously passed to acousto-optic medium, and refractive index is formed in acousto-optic medium
Variation, light beam change the direction of propagation of light by the way that interaction occurs when acousto-optic medium, that is, generate diffraction, diffraction light it is strong
Degree and direction change with the intensity of ultrasonic wave and the state of frequency, so that the laser signal generated to laser tube 1 is adjusted.
Optionally, synchronous phase discriminator 7 can be photomultiplier tube.Since photomultiplier tube is existing common components,
Cost of implementation is low.
Optionally, isotope there are two types of being set in the first absorption chamber 3, so that two kinds of isotope RESONANCE ABSORPTIONs, are selected
Signal frequency is locked in atomic ground state hyperfine 0-0 centre frequency.
Optionally, isotope there are two types of being set in the second absorption chamber 4, so that two kinds of isotope RESONANCE ABSORPTIONs, are selected
Signal frequency is locked in atomic ground state hyperfine 0-0 centre frequency.
In practical applications, it can set inside DDS 62 there are two frequency control register, be set in frequency control register
It is equipped with different frequency values.
Optionally, microprocessor 61 and DDS 62 can be connect with the same clock source, so that microprocessor 61 and DDS
The frequency stability of 62 signal is consistent.
Preferably, which can be high steady clock source, and such as Rb atom frequency marking is steady with the frequency for further increasing signal
Fixed degree.
Specifically, the end FSELECT of DDS 62 can be connect with microprocessor 61, to be selected according to the state at the end FSELECT
Select the frequency values output of two frequency values.
In practical applications, microprocessor 61 applies the square-wave signal that duty ratio is 1:1 to the end FSELECT, and DDS 62 exists
The different frequency value of switching internal frequency control register setting in the period of square-wave signal.
The embodiment of the present invention selects swashing for preset frequency by the first absorption chamber from the laser signal that laser tube generates
Optical signal, the laser signal that acousto-optic modulator selects the first absorption chamber are adjusted, through the second absorber after adjusting
The laser signal of preset frequency is selected in laser signal, synchronous phase discriminator synchronizes phase demodulation to the laser signal selected, produces
The raw error signal for acting on piezo-electric crystal driver, piezo-electric crystal driver swash according to what error signal adjustment laser tube exported
Optical signal finally locks the output frequency of laser, improves the stability of the output frequency of laser, meets high-precision and sets
Standby requirement.And signal source device uses laser tube, piezo-electric crystal driver, AOM, absorption chamber, DDS, microprocessor, synchronization
These mature electronic components of phase discriminator are realized, are realized simple and convenient, at low cost.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of laser, the laser includes laser tube, which is characterized in that the laser tube further includes piezo-electric crystal driving
Device, the first absorption chamber, the second absorption chamber, acousto-optic modulator AOM, low frequency modulations device, synchronous phase discriminator, it is the laser tube, described
First absorption chamber, the acousto-optic modulator AOM, second absorption chamber, the synchronous phase discriminator, the piezo-electric crystal driver
It is sequentially connected, the piezo-electric crystal driver is connect with the laser tube, and the low frequency modulations device includes micro- place interconnected
Device and Direct Digital Frequency Synthesizers DDS are managed, the microprocessor is connected with the synchronous phase discriminator, the Direct Digital frequency
Synthesizer DDS is connect with the acousto-optic modulator AOM；
Wherein, the laser tube is used for, and generates laser signal；First absorption chamber is used for, and what is generated from the laser swashs
The laser signal of preset frequency is selected in optical signal；The microprocessor is used for, Xiang Suoshu Direct Digital Frequency Synthesizers DDS
Apply the square-wave signal that duty ratio is 1:1；The Direct Digital Frequency Synthesizers DDS is used for, in the period of the square-wave signal
The frequency values output of interior switching internal frequency control register setting；The acousto-optic modulator AOM is used for, in the Direct Digital
The laser signal selected under the action of the frequency values of frequency synthesizer DDS output to first absorption chamber is adjusted；It is described
Second absorption chamber is used for, and the signal of preset frequency is selected from the laser signal after acousto-optic modulator AOM adjusting；It is described
Synchronous phase discriminator is used for, the laser signal that second absorption chamber is selected under the signal function of microprocessor output into
The synchronous phase demodulation of row, generates the error signal for acting on the piezo-electric crystal driver；The piezo-electric crystal driver is used for, according to
The error signal adjusts the laser signal of the laser tube output.
2. laser according to claim 1, which is characterized in that the synchronous phase discriminator is photomultiplier tube.
3. laser according to claim 1 or 2, which is characterized in that isotope there are two types of being set in first absorption chamber.
4. laser according to claim 1 or 2, which is characterized in that isotope there are two types of being set in second absorption chamber.
5. laser according to claim 1 or 2, which is characterized in that set inside the Direct Digital Frequency Synthesizers DDS
There are two frequency control register, different frequency values are provided in described two frequency control registers.
6. laser according to claim 1 or 2, which is characterized in that the microprocessor and the Direct Digital frequency
Synthesizer DDS is connect with the same clock source.
7. laser according to claim 6, which is characterized in that the clock source is high steady clock source.
8. laser according to claim 1 or 2, which is characterized in that the Direct Digital Frequency Synthesizers DDS's
The end FSELECT is connect with the microprocessor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510799596.0A CN105490156B (en) | 2015-11-19 | 2015-11-19 | A kind of laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510799596.0A CN105490156B (en) | 2015-11-19 | 2015-11-19 | A kind of laser |
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| Publication Number | Publication Date |
|---|---|
| CN105490156A CN105490156A (en) | 2016-04-13 |
| CN105490156B true CN105490156B (en) | 2019-06-21 |
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| CN201510799596.0A Active CN105490156B (en) | 2015-11-19 | 2015-11-19 | A kind of laser |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101442179A (en) * | 2008-12-02 | 2009-05-27 | 浙江大学 | Apparatus and method for locking DDS acousto-optic modulation wavelength |
| CN102801100A (en) * | 2012-07-23 | 2012-11-28 | 江汉大学 | Device for improving output frequency stability of laser and laser with device |
| CN202759150U (en) * | 2012-07-23 | 2013-02-27 | 江汉大学 | Frequency stabilization device used for improving laser long-term stabilization degree |
| CN202840234U (en) * | 2012-07-23 | 2013-03-27 | 江汉大学 | Frequency regulator for improving short-term stability of laser |
| CN103297047A (en) * | 2013-05-29 | 2013-09-11 | 江汉大学 | Atomic frequency standard and servo locking method |
| CN204721334U (en) * | 2015-04-30 | 2015-10-21 | 江汉大学 | Atomic frequency standard servo circuit |
| CN205429415U (en) * | 2015-11-19 | 2016-08-03 | 江汉大学 | Laser device |
-
2015
- 2015-11-19 CN CN201510799596.0A patent/CN105490156B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101442179A (en) * | 2008-12-02 | 2009-05-27 | 浙江大学 | Apparatus and method for locking DDS acousto-optic modulation wavelength |
| CN102801100A (en) * | 2012-07-23 | 2012-11-28 | 江汉大学 | Device for improving output frequency stability of laser and laser with device |
| CN202759150U (en) * | 2012-07-23 | 2013-02-27 | 江汉大学 | Frequency stabilization device used for improving laser long-term stabilization degree |
| CN202840234U (en) * | 2012-07-23 | 2013-03-27 | 江汉大学 | Frequency regulator for improving short-term stability of laser |
| CN103297047A (en) * | 2013-05-29 | 2013-09-11 | 江汉大学 | Atomic frequency standard and servo locking method |
| CN204721334U (en) * | 2015-04-30 | 2015-10-21 | 江汉大学 | Atomic frequency standard servo circuit |
| CN205429415U (en) * | 2015-11-19 | 2016-08-03 | 江汉大学 | Laser device |
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| CN105490156A (en) | 2016-04-13 |
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