CN2747756Y - Phase-lock laser frequency stabilizer - Google Patents
Phase-lock laser frequency stabilizer Download PDFInfo
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- CN2747756Y CN2747756Y CN 200420111355 CN200420111355U CN2747756Y CN 2747756 Y CN2747756 Y CN 2747756Y CN 200420111355 CN200420111355 CN 200420111355 CN 200420111355 U CN200420111355 U CN 200420111355U CN 2747756 Y CN2747756 Y CN 2747756Y
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Abstract
The utility model discloses a phase-lock laser frequency stabilizer, comprising a tunable laser (1), a beam splitter mirror (2), a frequency stabilization reference source (3), a light-sensitive detector (4), a modulating signal source (5), a phase-sensitive detector (8), and a tuning driver (9). The phase-lock laser frequency stabilizer is characterized in that: the modulating signals output by the modulating signal source (5) are applied to the frequency stabilization reference source (3), and the laser frequency is locked on the frequency point of the goal. The advantages of the utility model are that the output laser has no frequency dispersion, and also has no attached modulation for the frequency or the intensity.
Description
Technical field:
The utility model relates to laser frequency stabilization, particularly a kind of phase-locked laser frequency stabilization.
Background technology:
Present laser frequency stabilization mainly adopts difference frequency stabilization and phase locking frequency stabilized.
The difference frequency stabilization is to allow the output frequency of laser be positioned on the slope of frequency stabilization a reference source (absworption peak slope, transmission peaks slope etc.), tells two bundles from output laser, and wherein beam of laser obtains the shoot laser intensity I through frequency stabilization a reference source frequency discrimination
1, the intensity I of regulating another Shu Jiguang
2, make it near I
1, with I
1And I
2Difference as error signal, the output frequency of negative feedback locked laser.The advantage of difference frequency stabilization is: the additional modulation that does not have laser frequency and intensity.Its weak point is: frequency stabilization circuit is in the DC operation state, and the point of safes of frequency drifts about easily.
Phase locking frequency stabilized is the output frequency by modulated laser, its peak value in frequency stabilization a reference source (absworption peak, transmission peaks etc.) is swung, the part of output laser is produced the corresponding strength modulation signal behind frequency stabilization a reference source frequency discrimination, method by phase sensitive detection, deviation between the crest frequency of detection laser centre frequency and frequency stabilization a reference source, size and Orientation according to deviation, the output center frequency of laser is adjusted in negative feedback, the crest frequency of laser frequency center and frequency stabilization a reference source is consistent, thereby reaches the purpose of frequency stabilization.The advantage of phase locking frequency stabilized is: can make on the rift-free peak point that is locked in frequency stabilization a reference source in frequency center.Its weak point is: the introducing of modulation makes laser frequency produce additional modulation, the also common simultaneously additional modulation with laser intensity.
In a word, existing frequency-stabilizing method can't both not had frequency and intensity additional modulation, rift-free again laser frequency stabilization effect.
Summary of the invention:
The purpose of this utility model is: a kind of phase-locked laser frequency stabilization device is provided, this device is that modulation signal is applied on the frequency stabilization a reference source, rather than be applied on the tune driver of laser, laser is not modulated, make output laser not have the additional modulation of frequency and intensity; Because the peak value that adopts modulating signal source as frequency reference, makes output laser not have frequency drift.
In order to achieve the above object, the utility model adopts following technical scheme:
A kind of phase-locked laser frequency stabilization device is made up of tunable laser, beam splitter, frequency stabilization a reference source, photodetector, modulating signal source, phase-sensitive detector and tune driver; On the output light path of tunable laser, place beam splitter, coaxial in order placement frequency stabilization a reference source and photodetector on the reflected light path of beam splitter, the output signal of telecommunication of photodetector is delivered to phase-sensitive detector, the sine wave signal of modulating signal source output is applied on the frequency stabilization a reference source, the square-wave signal of modulating signal source output is delivered to phase-sensitive detector, the error signal of phase-sensitive detector output is delivered to tune driver, and the output signal of tune driver is applied to tunable laser.
Advantage of the present utility model and effect: this device makes the laser frequency and the intensity of laser output not only not have drift but also do not have additional modulation.
Description of drawings:
Fig. 1 is a kind of structural representation of phase-locked laser frequency stabilization device.
Wherein: 1 tunable laser, 2 beam splitters, 3 frequency stabilization a reference sources, 4 photodetectors, 5 modulating signal sources, 8 phase-sensitive detectors, 9 tune driver.
Phase sensitive detection schematic diagram when Fig. 2 laser is in different frequency point.
Phase sensitive detection schematic diagram when Fig. 2 a laser is in target frequency point;
Phase sensitive detection schematic diagram when Fig. 2 b laser is lower than target frequency point slightly;
The phase sensitive detection schematic diagram of Fig. 2 c laser during far below target frequency point;
Phase sensitive detection schematic diagram when Fig. 2 d laser is slightly higher than target frequency point;
The phase sensitive detection schematic diagram of Fig. 2 e laser during far above target frequency point.
Wherein: 10 modulation signals, 11 frequency stabilization a reference source curves, the signal when 12 laser frequencies are positioned at target frequency point on the detector, the signal when 13 laser frequencies are lower than target frequency slightly on the detector, 14 laser frequencies are the signal on the detector when signal on the detector, the signal when 15 laser frequencies are slightly higher than target frequency on the detector, 16 laser frequencies are far above target frequency during far below target frequency.
Fig. 3 is the relation of frequency stabilization a reference source curve and error signal.
Wherein: 17 frequency error curves.
Embodiment:
The utility model is described in further detail below in conjunction with accompanying drawing:
Structure of the present utility model is: as shown in Figure 1, on the output light path of tunable laser 1, place beam splitter 2, coaxial in order placement frequency stabilization a reference source 3 and photodetector 4 on the reflected light path of beam splitter 2, the output signal of telecommunication of photodetector 4 is delivered to phase-sensitive detector 8; The sine wave signal of modulating signal source 5 outputs is applied on the frequency stabilization a reference source 3; The square-wave signal of modulating signal source 5 outputs is delivered to phase-sensitive detector 8, and the error signal of phase-sensitive detector 8 outputs is delivered to tune driver 9, and the output signal of tune driver 9 is applied to tunable laser 1.
Describe the course of work of the present utility model below in conjunction with accompanying drawing, by Fig. 1, Fig. 2, Fig. 3 as can be known, with beam splitter 2 the output light of tunable laser 1 is divided into two bundles, transmitted light is directly exported, and reverberation is input to frequency stabilization a reference source 3; Modulating signal source 5 output amplitudes are that A, frequency are f
TSinewave modulation signal 10 be applied on the frequency stabilization a reference source 3; As shown in Figure 2: frequency stabilization a reference source 3 makes the crest frequency of frequency stabilization a reference source put v at target frequency under the signal effect by signal synthesizer 7 outputs
0Left and right sides v
-And v
+Between the vibration, the illumination that frequency stabilization a reference source 3 is sent (or transmission) is mapped to photodetector 4.If laser frequency v just in time equals v
0, with picked up signal 12, signal 12 is two frequencys multiplication of modulation signal 10 on the photodetector 4; If laser frequency v is partial to v slightly
_, with picked up signal 13, signal 13 is two frequencys multiplication of modulation signal 10, and phase place is more leading than signal 12 on the photodetector 4; If laser frequency v is partial to v greatly
_, will obtain on the photodetector 4 and the signal 14 of modulation signal 10 with the frequency homophase; If laser frequency v is partial to v a little
+, with picked up signal 15, signal 15 is two frequencys multiplication of modulation signal 10 on the photodetector 4, and phase place lags behind than signal 12; If laser frequency v is partial to v greatly
+, will obtain signal 16 on the photodetector 4 with modulation signal 10 with same frequency and reversed-phase.With modulating signal source 5 output with modulation signal 10 with the square-wave signals of homophases frequently, together be input to phase-sensitive detector 8 together with picked up signal on the photodetector 4.When the signal on the photodetector 4 was 12, the phase-sensitive detector output voltage was zero; When the signal on the photodetector 4 was 13 or 14, the phase-sensitive detector output voltage was less than zero; When the signal on the photodetector 4 is 15 or 16, the phase-sensitive detector output voltage is greater than zero, obtain frequency error curve 17 shown in Figure 3 thus, regulate control signal as error according to this, carry out negative feedback through 9 pairs of tunable laser of tune driver 1 and regulate control, make the output laser frequency of tunable laser 1 be locked in target frequency point v
0The place is to reach the frequency stabilization purpose.
The frequency stabilization a reference source that adapts with the utility model: frequency stabilization a reference source 3 can be selected atom Zeemen effect device, Faraday effect device or have a reference source of the device (or system) of certain tunability as laser frequency stabilization by atom steam bubble and acousto-optic crystal combination components etc.If seek out bigger frequency stabilization frequency-tuning range, can also select to have warbled F-P etalon as the frequency stabilization reference source.
Claims (1)
1, a kind of phase-locked laser frequency stabilization device is characterized in that, this device is made up of tunable laser (1), beam splitter (2), frequency stabilization a reference source (3), photodetector (4), modulating signal source (5), phase-sensitive detector (8) and tune driver (9); On the output light path of tunable laser (1), place beam splitter (2), coaxial in order placement frequency stabilization a reference source (3) and photodetector (4) on the reflected light path of beam splitter (2), the output signal of telecommunication of photodetector (4) is delivered to phase-sensitive detector (8), the modulation signal of modulating signal source (5) output is applied on the frequency stabilization a reference source (3), the square-wave signal of modulating signal source (5) output is delivered to phase-sensitive detector (8), the error signal of phase-sensitive detector (8) output is delivered to tune driver (9), and the output signal of tune driver (9) is applied to tunable laser (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420111355 CN2747756Y (en) | 2004-11-12 | 2004-11-12 | Phase-lock laser frequency stabilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420111355 CN2747756Y (en) | 2004-11-12 | 2004-11-12 | Phase-lock laser frequency stabilizer |
Publications (1)
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|---|---|
| CN2747756Y true CN2747756Y (en) | 2005-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420111355 Expired - Fee Related CN2747756Y (en) | 2004-11-12 | 2004-11-12 | Phase-lock laser frequency stabilizer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800395A (en) * | 2010-03-04 | 2010-08-11 | 浙江大学 | Digitalized laser phase-locking device and phase-locking method |
| CN107546571A (en) * | 2017-07-31 | 2018-01-05 | 北京航天控制仪器研究所 | A kind of pump light frequency-stabilizing method for SERF atomic spin gyroscopes |
| CN111736134A (en) * | 2020-07-13 | 2020-10-02 | 中国科学院精密测量科学与技术创新研究院 | Single seed injection differential absorption laser radar based on electro-optical modulation |
| CN113078552A (en) * | 2021-03-15 | 2021-07-06 | 中国科学院上海光学精密机械研究所 | Frequency stabilizing device of single-frequency laser based on intracavity self-reference |
-
2004
- 2004-11-12 CN CN 200420111355 patent/CN2747756Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800395A (en) * | 2010-03-04 | 2010-08-11 | 浙江大学 | Digitalized laser phase-locking device and phase-locking method |
| CN101800395B (en) * | 2010-03-04 | 2011-11-02 | 浙江大学 | Digitalized laser phase-locking device and phase-locking method |
| CN107546571A (en) * | 2017-07-31 | 2018-01-05 | 北京航天控制仪器研究所 | A kind of pump light frequency-stabilizing method for SERF atomic spin gyroscopes |
| CN111736134A (en) * | 2020-07-13 | 2020-10-02 | 中国科学院精密测量科学与技术创新研究院 | Single seed injection differential absorption laser radar based on electro-optical modulation |
| CN113078552A (en) * | 2021-03-15 | 2021-07-06 | 中国科学院上海光学精密机械研究所 | Frequency stabilizing device of single-frequency laser based on intracavity self-reference |
| CN113078552B (en) * | 2021-03-15 | 2022-08-30 | 中国科学院上海光学精密机械研究所 | Frequency stabilizing device of single-frequency laser based on intracavity self-reference |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |