CN204205278U - Laser system frequency synchronization system - Google Patents
Laser system frequency synchronization system Download PDFInfo
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- CN204205278U CN204205278U CN201420560436.1U CN201420560436U CN204205278U CN 204205278 U CN204205278 U CN 204205278U CN 201420560436 U CN201420560436 U CN 201420560436U CN 204205278 U CN204205278 U CN 204205278U
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Abstract
The utility model provides a kind of laser system Frequency Synchronization system, and this laser system Frequency Synchronization system comprises a road basic frequency signal generating unit, standard electric signal generation unit and one or more secondary frequencies signal generating unit; Standard electric signal generation unit accesses basic frequency signal generating unit and one or more secondary frequencies signal generating unit respectively; Basic frequency signal generating unit access respectively with one or more secondary frequencies signal generating unit.The utility model can realize the mutual locking of two covers or many cover laser systems especially frequency comb frequency, realizes real dynamic, the real-time synchronization of two covers or many cover laser systems especially frequency comb frequency.
Description
Technical field
The utility model belongs to laser technology field, relates to a kind of laser system Frequency Synchronization system, particularly relates to a kind of frequency that makes and links and synchronous many frequency comb system frequency synchro system.
Background technology
After Frequency Locking and carrier phase lock are carried out to femto-second laser, it can produce all highly stable time domain ultrashort pulse signal of interval, amplitude, power, this pulse train has abundant Fourier transform frequency spectrum, can realize microwave frequency and be connected with the direct of optical frequency.Just can achieve the direct absolute measurement of all optical frequencies from near-infrared to visible region with a stand lock mould femtosecond pulse laser, this achievement is acknowledged as the breakthrough that optical frequency measurement field has revolutionary significance.Pectination optical frequency generator based on locked mode femtosecond pulse technology is considered to realize the light gear that optical frequency and microwave frequency are transmitted, utilize the Optical Clock of femtosecond optical frequency comb technology, not only have abundant frequency, but also there is the frequency stability that can match in excellence or beauty with atomic clock, it has very extensively important application in laser is without guide rail absolute distance measurement, such as, high-speed railway in industry, large aircraft, the preparation of the big machinery such as nuclear power and wind-powered electricity generation change system and debuging, its size is at tens meters of rice even up to a hundred, required precision is in micron dimension, and the satellites formation in space, its measuring distance reaches several thousand kilometers, required precision micron dimension.At these special industry light comb as high accuracy ruler, show huge advantage.
Science and technology, while development of advancing by leaps and bounds, promotes the development of certainty of measurement and measuring distance requirement.Although single optical fiber comb has certain advantage in short distance high accuracy, long distance general precision, there is the shortcoming that cannot overcome for long distance and high precision measurement aspect, be in particular in:
1) when ground test, accurately will measure large scale, the equipment of oversize and device, the factors such as the disturbance of air refraction, the variations in temperature of zones of different, have larger impact to range accuracy, cannot make corresponding compensation;
2), when adopting single optical fiber to comb range finding, data volume is very large, is difficult to accomplish real-time measurement;
3) even if adopt two light combs or many light comb, also there is frequency and the nonsynchronous problem of phase place, cause measure error.
Utility model content
In order to solve the above-mentioned technical problem existed in background technology, the utility model provides a kind of laser system Frequency Synchronization system realizing two covers or many cover Frequency Synchronization or locking.
Technical solution of the present utility model is: the utility model provides a kind of laser system Frequency Synchronization system, it is characterized in that: described system comprises a road basic frequency signal generating unit, standard electric signal generation unit and one or more secondary frequencies signal generating unit; Described standard electric signal generation unit accesses basic frequency signal generating unit and one or more secondary frequencies signal generating unit respectively; Described basic frequency signal generating unit accesses one or more secondary frequencies signal generating unit.
Above-mentioned basic frequency signal generating unit comprises the first laser system, the first photodetector, the first electrical filter, the first electric amplifier, power splitter, basic frequency signal generating unit electricity frequency mixer and the first server; Described first laser system is successively through the first photodetector, the first electrical filter and the first electric amplifier access power splitter; Described power splitter accesses basic frequency signal generating unit electricity frequency mixer and one or more secondary frequencies signal generating unit respectively; Described standard electric signal generation unit accesses the first laser system by basic frequency signal generating unit electricity frequency mixer and the first server successively.
Above-mentioned basic frequency signal generating unit also comprises the first frequency lock cell be arranged in the first laser system; Described standard electric signal generation unit is successively by basic frequency signal generating unit electricity frequency mixer and the first server access first frequency lock cell.
Above-mentioned secondary frequencies signal generating unit comprises the second laser system, the second photodetector, the second electrical filter, the second electric amplifier, the electric frequency mixer of secondary frequencies signal generating unit first, the electric frequency mixer of secondary frequencies signal generating unit second and the second server; Described second laser system is successively by the electric frequency mixer of the second photodetector, the second electrical filter, the second electric amplifier and secondary frequencies signal generating unit first electric frequency mixer access secondary frequencies signal generating unit second; The electric frequency mixer of described power splitter access secondary frequencies signal generating unit first; Described standard electric signal generation unit accesses the second laser system by the electric frequency mixer of secondary frequencies signal generating unit second and the second server successively.
Above-mentioned secondary frequencies signal generating unit also comprises the second frequency lock cell be arranged in the second laser system; Described standard electric signal generation unit is successively by the electric frequency mixer of secondary frequencies signal generating unit second and the second server access second frequency lock cell.
Above-mentioned first frequency lock cell and second frequency lock cell are all the Frequency Locking unit formed by piezoelectric ceramic or acousto-optic modulator etc.
Above-mentioned first laser system and the second laser system are all frequency comb system or laser generation system.
When above-mentioned first laser system and the second laser system are all frequency comb systems, described frequency comb system comprise integrated frequency comb system, microcavity on solid frequency comb system, optical fiber frequency comb system, sheet frequency comb system and by frequency stabilization mode produce the system of frequency comb; When described frequency comb system is optical fiber frequency comb system, described optical fiber frequency comb system comprises the optical fiber frequency comb system of polarization maintaining optical fibre frequency comb system, non PM fiber frequency comb system and different-waveband; When described first laser system and the second laser system are all laser generation system, described laser generation system can be the light pulse laser generation system produced in locked mode mode (comprise initiatively and passive mode locking), the lasing laser system of alternate manner such as laser generation system, quasi-continuous lasing generation system that gain switched laser produces system, modulation produces; When described laser generation system can be the light pulse laser generation system produced in locked mode mode, described laser generation system is the light pulse laser generation system that the light pulse laser generation system that produces of active mode locking mode or passive mode locking mode produce.
Above-mentioned standard electric signal generation unit comprises atomic clock and frequency synthesizer; The quantity of described frequency synthesizer is identical with the quantity sum of secondary frequencies signal generating unit with basic frequency signal generating unit; Described atomic clock is connected with basic frequency signal generating unit and secondary frequencies signal generating unit respectively by frequency synthesizer.
The utility model has the advantages that:
The utility model provides a kind of laser system Frequency Synchronization system, the application is on the basis of the inclined round trip flight optical fiber second frequency comb scheme of all risk insurance, introduce multiple laser system frequency linkage technique, the mutual locking of two covers or many cover laser systems especially frequency comb frequency can be achieved, achieve real dynamic, the real-time synchronization of two covers or many cover laser systems especially frequency comb frequency.The method plays a significant role in range finding, multiple spot clock synchronous, the difference in functionality different modes different frequency multi-frequency comb field such as synchronous, and the method original is cheap, working stability, is adapted at the extensive use of the field such as industry, scientific research.
Accompanying drawing explanation
Fig. 1 is the structural representation of laser system Frequency Synchronization system provided by the utility model
Fig. 2 a is the first frequency comb system frequency change curve;
Fig. 2 b is the frequency variation curve figure that the second frequency comb system follows the first frequency comb system;
Fig. 2 c is the cross-correlation curve chart of the first frequency comb system and the second frequency comb system output frequency.
Embodiment
Primary structure of the present utility model and principle are:
The utility model main purpose provides especially frequency comb system or the interlock of laser generation system frequency of two or more laser system, realizes the multiple laser system especially true synchronization of frequency comb system in frequency.The laser system that the utility model relates to includes but not limited to frequency comb system, wherein frequency comb system comprises solid frequency comb system, optical fiber frequency comb system (comprising the inclined or non-guarantor of guarantor inclined and different-waveband), integrated frequency comb system on sheet, the frequency comb system of microcavity, and other produces the system of frequency comb with frequency stabilization and steady phase mode, laser generation system can be the light pulse produced in locked mode mode (comprising initiatively and passive mode locking), also can be gain switch laser, the laser that modulation produces, the lasing laser system of the alternate manners such as quasi-continuous laser.About the internal structure of frequency comb, the acquisition Nobel Prize of solid structure, traditional optical fiber comb light source is at S. Utility " Prequency combs source with large comb spacing " (International pulication number:WO2012/074623A1, PCT/US2011/057567), " Pulsed laser sources " (Patent number:US8599473B2), " Compact optical frequency comb systems " (International pulication number:WO2012/166572A1, PCT/US2012/039509) introduce in detail, the frequency comb of polarization maintaining optical fibre is in utility model " all risk insurance inclined active tracing type optical fiber comb the light source " (number of accepting: 201410363793.3) introduce in detail, and the scheme of microcavity is at article " Microresonator-based optical frequency combs " (Science, vol.332.pp:555 ~ 559, 2011) embody, do not repeat them here.
The utility model main innovate point is: achieve the Frequency Synchronization of two or more laser system especially between frequency comb system or interlock.The utility model especially uses between frequency comb system in two or more laser system simultaneously, can realize the true synchronization of multiple frequency comb system.
Fig. 1 is shown in by the Frequency Synchronization of multiple laser system especially between frequency comb system or interlock schematic diagram, and laser system Frequency Synchronization system provided by the utility model comprises a road basic frequency signal generating unit, standard electric signal generation unit and one or more secondary frequencies signal generating unit; Standard electric signal generation unit accesses basic frequency signal generating unit and one or more secondary frequencies signal generating unit respectively; Basic frequency signal generating unit accesses one or more secondary frequencies signal generating unit.
Basic frequency signal generating unit comprises the first laser system, the first photodetector, the first electrical filter, the first electric amplifier, power splitter, basic frequency signal generating unit electricity frequency mixer and the first server; First laser system is successively through the first photodetector, the first electrical filter and the first electric amplifier access power splitter; Power splitter accesses basic frequency signal generating unit electricity frequency mixer and one or more secondary frequencies signal generating unit respectively; Standard electric signal generation unit accesses the first laser system by basic frequency signal generating unit electricity frequency mixer and the first server successively.
Basic frequency signal generating unit also comprises the first frequency lock cell be arranged in the first laser system; Standard electric signal generation unit is successively by basic frequency signal generating unit electricity frequency mixer and the first server access first frequency lock cell.
Secondary frequencies signal generating unit comprises the second laser system, the second photodetector, the second electrical filter, the second electric amplifier, the electric frequency mixer of secondary frequencies signal generating unit first, the electric frequency mixer of secondary frequencies signal generating unit second and the second server; Second laser system is successively by the electric frequency mixer of the second photodetector, the second electrical filter, the second electric amplifier and secondary frequencies signal generating unit first electric frequency mixer access secondary frequencies signal generating unit second; The electric frequency mixer of power splitter access secondary frequencies signal generating unit first; Standard electric signal generation unit accesses the second laser system by the electric frequency mixer of secondary frequencies signal generating unit second and the second server successively.
Secondary frequencies signal generating unit also comprises the second frequency lock cell be arranged in the second laser system; Standard electric signal generation unit is successively by the electric frequency mixer of secondary frequencies signal generating unit second and the second server access second frequency lock cell.
First frequency lock cell and second frequency lock cell are all the Frequency Locking unit formed by piezoelectric ceramic or acousto-optic modulator.
First laser system and the second laser system are all frequency comb systems, or laser generation system.
Frequency comb system comprise integrated frequency comb system, microcavity on solid frequency comb system, optical fiber frequency comb system, sheet frequency comb system and by frequency stabilization mode produce the system of frequency comb; When frequency comb system is optical fiber frequency comb system, optical fiber frequency comb system comprises the optical fiber frequency comb system of polarization maintaining optical fibre frequency comb system, non PM fiber frequency comb system and different-waveband.Laser generation system can be the light pulse produced in locked mode mode (comprising initiatively and passive mode locking), also can be the lasing laser system of alternate manner such as laser, quasi-continuous laser of gain switch laser, modulation generation.
Standard electric signal generation unit comprises atomic clock and frequency synthesizer; The quantity of frequency synthesizer is identical with the quantity sum of secondary frequencies signal generating unit with basic frequency signal generating unit; Atomic clock is connected with basic frequency signal generating unit and secondary frequencies signal generating unit respectively by frequency synthesizer.
The synchronous method of synchro system provided by the utility model is:
The light signal that the output of the first frequency comb system contains repetition rate (fr) converts fr light signal to the signal of telecommunication through the first photodetector, through the first filter, first electric amplifier, be connected with power splitter, power splitter can be 1:n, n value can be 2, 3, 4 the link of multiple system can be realized, one of them delivery outlet of power splitter with on the first electric frequency mixer, carry out mixing through the standard electric signal of first frequency synthesizer frequency conversion from atomic clock, obtain error signal through the first servo feedback to the Frequency Locking unit of the first frequency comb system (note: in order to the filter of this error signal of telecommunication of terse extraction no longer describes and display at this), this Frequency Locking unit can be piezoelectric ceramic, the frequency locking subsystems such as acousto-optic modulator.
The repetition rate signal fr exporting the second road signal of telecommunication and the second frequency comb system produced from the second frequency comb system-> second photodetector-> second filter-> second electric amplifier from power splitter creates the error signal of telecommunication (note: no longer to describe at this in order to the filter of this error signal of telecommunication of terse extraction and show) at the second electric frequency mixer, the error signal produced by the second frequency mixer had both comprised the first frequency comb system frequency change information, also the second frequency comb system frequency change information is comprised, the standard signal mixing that this error signal of telecommunication produces with atomic clock-> second frequency synthesizer on the 3rd electric frequency mixer be produced error signal through the second servo feedback to the Frequency Locking unit of the second frequency comb system.Adopt the frequency of this technology second frequency comb system can follow the tracks of the first frequency comb system, Fig. 2 a, Fig. 2 b and Fig. 2 c are exactly the experimental result of two frequency comb frequency interlocks.
Wherein, Fig. 2 a is that the first frequency synthesizer of the first frequency comb system deliberately does frequency sweep action, and Fig. 2 b is the variation diagram of the second frequency comb system output frequency, can find out the first frequency comb system frequency on the second frequency comb system frequency perfect tracking.Fig. 2 c is the first frequency comb system and these two frequency comb system output frequency cross-correlation curves of the second frequency comb system.Same mode can synchronous multiple frequency comb system, it is emphasized that if the repetition rate difference between system and other system is too large at this, the increasing that can increase electricity between the frequency mixer line of power splitter and other frequency comb system frequently or subtract device frequently, realizes the stable operation between system.
Two laser systems or multiple laser system adopt frequency interlock linkage technique simultaneously, can realize multiple laser system dynamic, real-time synchronization that especially frequency comb system is real.This technology synchronously plays a significant role at range finding, multiple spot clock synchronous, difference in functionality different modes different frequency multi-frequency comb.
Claims (9)
1. a laser system Frequency Synchronization system, is characterized in that: described laser system Frequency Synchronization system comprises a road basic frequency signal generating unit, standard electric signal generation unit and one or more secondary frequencies signal generating unit; Described standard electric signal generation unit accesses basic frequency signal generating unit and one or more secondary frequencies signal generating unit respectively; Described basic frequency signal generating unit accesses one or more secondary frequencies signal generating unit.
2. laser system Frequency Synchronization system according to claim 1, is characterized in that: described basic frequency signal generating unit comprises the first laser system, the first photodetector, the first electrical filter, the first electric amplifier, power splitter, basic frequency signal generating unit electricity frequency mixer and the first server; Described first laser system is successively through the first photodetector, the first electrical filter and the first electric amplifier access power splitter; Described power splitter accesses basic frequency signal generating unit electricity frequency mixer and one or more secondary frequencies signal generating unit respectively; Described standard electric signal generation unit accesses the first laser system by basic frequency signal generating unit electricity frequency mixer and the first server successively.
3. laser system Frequency Synchronization system according to claim 2, is characterized in that: described basic frequency signal generating unit also comprises the first frequency lock cell be arranged in the first laser system; Described standard electric signal generation unit is successively by basic frequency signal generating unit electricity frequency mixer and the first server access first frequency lock cell.
4. laser system Frequency Synchronization system according to claim 3, is characterized in that: described secondary frequencies signal generating unit comprises the second laser system, the second photodetector, the second electrical filter, the second electric amplifier, the electric frequency mixer of secondary frequencies signal generating unit first, the electric frequency mixer of secondary frequencies signal generating unit second and the second server; Described second laser system is successively by the electric frequency mixer of the second photodetector, the second electrical filter, the second electric amplifier and secondary frequencies signal generating unit first electric frequency mixer access secondary frequencies signal generating unit second; The electric frequency mixer of described power splitter access secondary frequencies signal generating unit first; Described standard electric signal generation unit accesses the second laser system by the electric frequency mixer of secondary frequencies signal generating unit second and the second server successively.
5. laser system Frequency Synchronization system according to claim 4, is characterized in that: described secondary frequencies signal generating unit also comprises the second frequency lock cell be arranged in the second laser system; Described standard electric signal generation unit is successively by the electric frequency mixer of secondary frequencies signal generating unit second and the second server access second frequency lock cell.
6. laser system Frequency Synchronization system according to claim 5, is characterized in that: described first frequency lock cell and second frequency lock cell are all the Frequency Locking unit formed by piezoelectric ceramic or acousto-optic modulator.
7. the laser system Frequency Synchronization system according to Claims 2 or 3 or 4 or 5 or 6, is characterized in that: described first laser system and the second laser system are all frequency comb system or laser generation system.
8. laser system Frequency Synchronization system according to claim 7, it is characterized in that: when described first laser system and the second laser system are all frequency comb systems, described frequency comb system comprise integrated frequency comb system, microcavity on solid frequency comb system, optical fiber frequency comb system, sheet frequency comb system and by frequency stabilization mode produce the system of frequency comb; When described frequency comb system is optical fiber frequency comb system, described optical fiber frequency comb system comprises the optical fiber frequency comb system of polarization maintaining optical fibre frequency comb system, non PM fiber frequency comb system and different-waveband; When described first laser system and the second laser system are all laser generation system, described laser generation system is that light pulse laser generation system, gain switched laser generation system, the laser generation system of modulating generation or the quasi-continuous lasing produced in locked mode mode produces system; When described laser generation system is the light pulse laser generation system produced in locked mode mode, described laser generation system is the light pulse laser generation system that the light pulse laser generation system that produces of active mode locking mode or passive mode locking mode produce.
9. laser system Frequency Synchronization system according to claim 8, is characterized in that: described standard electric signal generation unit comprises atomic clock and frequency synthesizer; The quantity of described frequency synthesizer is identical with the quantity sum of secondary frequencies signal generating unit with basic frequency signal generating unit; Described atomic clock is connected with basic frequency signal generating unit and secondary frequencies signal generating unit respectively by frequency synthesizer.
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| CN201420560436.1U CN204205278U (en) | 2014-09-26 | 2014-09-26 | Laser system frequency synchronization system |
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| CN201420560436.1U CN204205278U (en) | 2014-09-26 | 2014-09-26 | Laser system frequency synchronization system |
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| CN204205278U true CN204205278U (en) | 2015-03-11 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104283100A (en) * | 2014-09-26 | 2015-01-14 | 中国科学院西安光学精密机械研究所 | Laser system frequency synchronizing system and method |
| CN110914708A (en) * | 2017-05-22 | 2020-03-24 | 德国航空航天中心 | Satellite system for navigation and/or geodetic surveying |
| CN111952831A (en) * | 2020-07-29 | 2020-11-17 | 清华大学深圳国际研究生院 | Dual-optical frequency comb system and offset frequency control method thereof |
-
2014
- 2014-09-26 CN CN201420560436.1U patent/CN204205278U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104283100A (en) * | 2014-09-26 | 2015-01-14 | 中国科学院西安光学精密机械研究所 | Laser system frequency synchronizing system and method |
| CN104283100B (en) * | 2014-09-26 | 2017-09-29 | 中国科学院西安光学精密机械研究所 | Laser system Frequency Synchronization system and synchronous method |
| CN110914708A (en) * | 2017-05-22 | 2020-03-24 | 德国航空航天中心 | Satellite system for navigation and/or geodetic surveying |
| CN110914708B (en) * | 2017-05-22 | 2024-03-29 | 德国航空航天中心 | Satellite system for navigation and/or geodetic measurement |
| CN111952831A (en) * | 2020-07-29 | 2020-11-17 | 清华大学深圳国际研究生院 | Dual-optical frequency comb system and offset frequency control method thereof |
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