CN106953692A - A kind of strange land bi-directional optical phase comparison method and device measured based on local side - Google Patents
A kind of strange land bi-directional optical phase comparison method and device measured based on local side Download PDFInfo
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- CN106953692A CN106953692A CN201710114390.9A CN201710114390A CN106953692A CN 106953692 A CN106953692 A CN 106953692A CN 201710114390 A CN201710114390 A CN 201710114390A CN 106953692 A CN106953692 A CN 106953692A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2589—Bidirectional transmission
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/11—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on acousto-optical elements, e.g. using variable diffraction by sound or like mechanical waves
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
- H04B10/66—Non-coherent receivers, e.g. using direct detection
- H04B10/69—Electrical arrangements in the receiver
- H04B10/697—Arrangements for reducing noise and distortion
Abstract
The invention discloses it is a kind of based on local side measure strange land bi-directional optical phase comparison method and its realize device, it is used as light source using two lasers for separating two places, between with remote optical fiber link be connected, the output optical signal of two lasers is simultaneously opposite on same root optical fiber to be propagated, the flashlight of wherein one laser by optical fiber link to local side send and with another laser beat frequency, simultaneously the flashlight of another laser be sent to behind distal end by reflection backtracking and with its own beat frequency, compared by the way that two beat signals are entered with line phase, it is passive to eliminate optical fiber link common mode phase noise, to realize the comparison of two lasers.The structure of the present invention is not related to Active Compensation link noise, therefore does not need closed-loop control, the problem of in the absence of losing lock, and the reliability that it compares loop is higher.And the present invention is not influenceed by the transmission function of interferometer, therefore available for the phase noise for assessing broadband signal.
Description
Technical field
The invention belongs to optical fiber comparison technology field, it is related to bi-directional optical phase comparison method, it is especially a kind of based on this
Strange land bi-directional optical phase comparison method and its realize device that ground terminal is measured.
Background technology
Recently as continuing to develop for the correlation techniques such as optical frequency com, fiber optic communication, the achievement in research of current light clock
Major progress is achieved, the frequency stability and uncertainty of light clock have broken through 10-18Magnitude, traditional utilization satellite link
The scheme of the long-distance transmissions of frequency time signal is carried out, because the transmission stability of one day can only achieve 10-16Magnitude and can not
Meet the requirement of High Precision Long-distance light clock comparison.With reaching its maturity for Fibre Optical Communication Technology, remote optical fiber optical frequency transmits skill
Art has also shown larger application prospect and accuracy benefits, and the multiple countries of our times have carried out the research of association area, profit
10 can be reached with light transmission fiber frequency signal-20The magnitude in/day, it is sufficient to meet the high accuracy ratio between remote light clock
To demand.
In order to which the high accuracy for preferably realizing remote clock is compared, C.Clivati groups of Italy propose first within 2014
The thought that bi-directional optical phase is compared.In this scenario, the laser positioned at same root optical fiber two ends is sent to opposite end simultaneously
Optical signal, the transmission light for reaching two ends completes its beat frequency with local laser simultaneously, and synchronous acquisition is realized using tracking mode DDS
With processing beat signal, the common mode phase noise of optical fiber link is passively eliminated, high-precision comparison result is obtained.The same year, method
Anne Amy-Klein groups of state propose the experimental program that bi-directional optical frequency is compared, program frequency of use meter on its basis
Number device collection beat signal, is compared by the frequency of two beat signals, obtains high-precision comparison result.The two schemes are equal
Two lasers for being located at two places respectively are simulated by beam splitting using a laser, its output light passes through same connection simultaneously
The optical fiber of two places is propagated and only propagated once in a fiber in opposite directions, it is assumed that be superimposed upon on two directions of propagation on round optical fiber link
Phase noise it is equal, pass through simultaneously gather two places phase or frequency comparison information, you can the passive elimination optical fiber common mode
Phase noise, has finally given 3dB high compared with conventional transmission technology acuracy comparison accuracy, ten thousand seconds frequency stabilities of two schemes
Reach 10-21Magnitude.
But there is also defect for the scheme of above prior art：
One, the scheme of prior art requires higher to the synchronousness of the phase measurement process in strange land, therefore, to assure that two
The phase of ground beat signal or the collection of frequency information have higher while property, are not easy to realize strange land truly.
Two, the circuit part device required for the scheme of prior art is more complicated, is easily introduced unrelated radio noise, influence
Comparison result.
The content of the invention
It is an object of the invention to the shortcoming for overcoming above-mentioned prior art, there is provided a kind of strange land pair measured based on local side
To optical phase comparison method and its realize device.
The purpose of the present invention is achieved through the following technical solutions：
It is this based on local side measure strange land bi-directional optical phase comparison method be：To separate two lasers of two places
As light source, between be connected with remote optical fiber link, the output optical signals of two lasers is simultaneously opposite on same root optical fiber
Propagate, wherein the flashlight of a laser by optical fiber link to local side send and with another laser beat frequency, simultaneously
The flashlight of another laser be sent to behind distal end by reflection backtracking and with its own beat frequency, by clapping the two
Frequency signal enters line phase comparison, passive to eliminate optical fiber link common mode phase noise, to realize the comparison of two lasers.
The present invention proposes a kind of device of the above-mentioned strange land bi-directional optical phase comparison method measured based on local side：Including
Optical texture and electricity part；The optical texture is by local side light path part, optical fiber link part and distal end light path part group
Into；The electricity part is made up of detector and radio-frequency signal source；The radio-frequency signal source includes the first radio-frequency signal source and the
Two radio-frequency signal sources；
Described local side light path part includes first laser device, and the output of the first laser device is connected with the first X-type
The input of beam splitter, the input of the first described X-type beam splitter is also associated with the detector of electricity part；First X-type point
The output of beam device is respectively arranged with the input of the first faraday mirror and first sound-optic modulator；
One end of the optical fiber link part is connected with the output of the first sound-optic modulator of local side light path part, another
End is connected with the output of the second sound-optic modulator of distal end light path part；
The distal end light path part includes second laser, and the output of the second laser is connected with the 2nd Y type beam splitting
The output of device；Another output of the 2nd Y type beam splitters is provided with the second faraday mirror；The 2nd Y type beam splitters
Input is connected with the input of second sound-optic modulator；
First radio-frequency signal source of the circuit part is connected with the radio frequency input of first sound-optic modulator；Second radio frequency is believed
Number source is connected with the radio frequency input of second sound-optic modulator.
Further, the splitting ratio of above-mentioned first X-type beam splitter is 50/50；The splitting ratio of the 2nd Y type beam splitters is
50/50。
Further, the optical fibre device used in above-mentioned optical texture is single-mode fiber device.
Further, have between above-mentioned first sound-optic modulator and second sound-optic modulator and fix and do not constitute multiple proportion
Difference on the frequency.
The present invention also proposes a kind of strange land bi-directional optical phase comparison method of said apparatus, specifically includes following steps：
The output light of the first laser device of local side light path part first passes through the first X-type beam splitter and is divided into two beams, wherein one
Shu Guang, which is reflected and entered along the first X-type beam splitter in the detector of electricity part by the first faraday mirror, waits beat frequency, another beam
Light is transferred into optical fiber link after first sound-optic modulator frequency displacement；Continue to be transferred into distal end light path in optical fiber link part
Part；
2) distal end light path part by by light that optical fiber link is transmitted after second sound-optic modulator frequency displacement, will frequency
Light after shifting is divided into two beams by the 2nd Y type beam splitters, wherein being reflected and along backtracking by the second faraday mirror all the way, this is returned
Light echo returns in local side and the first X-type beam splitter and closes beam beat frequency by the optical signal that the first faraday mirror reflects；At the same time, far
The output light of the second laser of light path part is held to enter optical fiber after the 2nd Y types beam splitter and second sound-optic modulator shift frequency
Link continues to transmit, and reaches after local side with closing beam beat frequency by the optical signal that the first faraday mirror reflects in the first X-type beam splitter.
Compared with prior art, the invention has the advantages that：
1) present invention has preferable phase noise reduction effect：
The present invention, simultaneously bi-directionally to passing optical signal, can passively be eliminated using simple optical fiber and be superimposed upon round optical fiber chain
Common mode phase noise on road, and noise active compensation device need not be introduced in optical frequency transmitting procedure, it not only simplify
Experimental program, and noise suppression effect is outstanding.
2) present invention can complete DATA REASONING in single place：
The present invention only places single photodetector in local side, only local holds two beat signals needed for collection,
Compared by the phase of two beat signals, so as to obtain the comparison result between local side laser and distal end laser.Have
What is imitated avoids by asynchronous the brought influence to comparison accuracy that strange land is measured, and achievement in research will be to remote light
The high accuracy of clock and more advanced atomic clock, which is compared, produces important impetus.
3) radio-frequency devices needed for the present invention are simple, working stability, and the bandwidth range for measuring phase noise is big：
The structure of the present invention is not related to Active Compensation link noise, therefore does not need closed-loop control, in the absence of asking for losing lock
Topic, the reliability that it compares loop is higher.And the present invention is not influenceed by the transmission function of interferometer, therefore it can be used for assessing
The phase noise of broadband signal.
Further, the present invention can overcome the technological deficiency faced in prior art bi-directional optical comparison process.Not only
Do well in terms of optical fiber common mode phase noise reduction, and DATA REASONING and collection can be completed in single place, evade different
The time asynchronous influence of ground measurement, effectively improves comparison accuracy, and can avoid closed-loop control, improves link reliable
Property, available for measurement wideband phase noise, with simple in construction, the advantages of stiffness of system is high.
Brief description of the drawings
Fig. 1 is strange land bi-directional optical phase control experiment method structural representation of the invention.
Wherein：Laser1 is first laser device, and Laser2 is second laser, and Lab1 is local side, and Lab2 is distal end,
AOM1 is first sound-optic modulator, and AOM2 is second sound-optic modulator, and FM1 is the first faraday rotation mirror, and FM2 is second farad
Mirror, PD is detector, and RF1 is the first radio-frequency signal source, and RF2 is the second radio-frequency signal source.
Embodiment
The present invention is to separate the two of two places laser based on the strange land bi-directional optical phase comparison method that local side is measured
Device as light source, between be connected with remote optical fiber link, the output optical signals of the two lasers same phase on same root optical fiber
To propagation, wherein the flashlight of a laser sent by optical fiber link to local side Lab1 and with another laser beat
Frequently, at the same the flashlight of another laser be sent to after the Lab2 of distal end by reflection backtracking and with its own beat frequency, lead to
Cross and enter line phase comparison to the two beat signals, it is passive to eliminate optical fiber link common mode phase noise, to realize two lasers
Comparison.
In order to realize above method, the present invention proposes that a kind of device is as shown in Figure 1：Including optical texture and electricity part；
Optical texture is made up of local side light path part, optical fiber link part and distal end light path part；Electricity part is by detector and penetrates
Frequency source signal is constituted；Radio-frequency signal source includes the first radio-frequency signal source RF1 and the second radio-frequency signal source RF2.
Local side light path part includes first laser device Laser1, and first laser device Laser1 output is connected with the first X
Type beam splitter SMC1 input, the first X-type beam splitter SMC1 input is also associated with the detector PD of electricity part；First X-type
Beam splitter SMC1 output is respectively arranged with the first faraday mirror FM1 and first sound-optic modulator AOM1 input.Optical fiber link
Partial one end is connected with the first sound-optic modulator AOM1 of local side light path part output, and the other end is connected with distal end light path
Partial second sound-optic modulator AOM2 output；Distal end light path part includes second laser Laser2, the second laser
Device Laser2 output is connected with the 2nd Y type beam splitters SMC2 output；Another output of the 2nd Y type beam splitters SMC1
It is provided with the second faraday mirror FM2.The input of the 2nd Y type beam splitters SMC1 is connected with the defeated of second sound-optic modulator AOM2
Enter.First radio-frequency signal source RF1 of circuit part is connected with first sound-optic modulator AOM1 radio frequency input.Second radiofrequency signal
Source RF2 is connected with second sound-optic modulator AOM2 radio frequency input.The optical fibre device used in the optical texture of the present invention is
Single-mode fiber device.Have between first sound-optic modulator AOM1 and second sound-optic modulator AOM2 and fix and do not constitute multiple proportion
Difference on the frequency.
In highly preferred embodiment of the present invention, the first X-type beam splitter SMC1 splitting ratio is 50/50, but is not limited to 50/50
Splitting ratio.2nd Y type beam splitters SMC2 splitting ratio is 50/50, but is not limited to 50/50 splitting ratio.
The strange land bi-directional optical phase comparison method of apparatus above specifically includes following steps：
1) local side light path part is first passed through 50/50 the first X-type beam splitter by first laser device Laser1 output light
It is two beams that SMC1, which is divided to, and 50% light is reflected by the first faraday mirror FM1 and enters electricity part along the first X-type beam splitter SMC1
Beat frequency is waited in detector PD, 50% light is transferred into optical fiber link after first sound-optic modulator AOM1 frequency displacements；Light
The part light is continued to be transferred into distal end light path part by fine link portions.
2) distal end light path part by by light that optical fiber link is transmitted after second sound-optic modulator AOM2 frequency displacements,
It is two beams that light after frequency displacement is divided to by 50/50 the 2nd Y type beam splitters SMC2, wherein anti-by the second faraday mirror FM2 all the way
Penetrate and along backtracking, the return light return to local side Lab1 with it is anti-by the first faraday mirror FM1 in the first X-type beam splitter SMC1
The optical signal penetrated closes beam beat frequency；At the same time, the second laser Laser2 of distal end light path part output light passes through the 2nd Y types
Enter optical fiber link after beam splitter SMC2, second sound-optic modulator AOM2 shift frequencies to continue to transmit, reach after local side Lab1 with the
Beam beat frequency is closed by the first faraday mirror FM1 optical signals reflected in one X-type beam splitter SMC1.
In summary, the present invention is built upon optical signal simultaneously on optical fiber on the basis of opposite propagation, now, passes through vacation
If the common mode phase noise being superimposed upon on two directions of propagation of optical fiber on round optical fiber is equal, therefore contains equal optical fiber phase
Two beat signals of position noise subtract each other, you can eliminate the phase noise, obtain the comparison result of degree of precision.This method
Only devising single detector and being located locally the beat signal of end, i.e., two can draw in local side measurement, then strange land is two-way
Optical phase comparison method avoids the need for obtaining data from distal end, therefore this method is not related to teledata exchange, it is to avoid different
Time synchronized during ground measurement data；Although wherein beat signal carries twice of fiber phase noise, it is necessary to it all the way
Enter line phase with another beat signal again after first being divided to compare.
The effect of acousto-optic modulator AOM1 used in the present invention is to produce the difference on the frequency between reference light and return light,
And then higher signal to noise ratio is obtained using heterodyne detection technology, and AOM2 addition is easy for differentiating useful signal and actual fiber
There is certain node reflected light and Rayleigh scattering light in system.Consider the problem of AOM introduces harmonic wave, therefore used in requiring
AOM should avoid multiple proportion.
All optical fibre devices involved in the present invention are single-mode fiber device, and larger temperature change can influence device
Performance, therefore heater members to be separated in the design, it is ensured that the normal work of other devices.
The light splitting ratio of beam splitter used in the present invention is not fixed, can be according to optical output power of laser and optical fiber chain
The data such as the length on road and specific loss are calculated.Used here as the optical splitter of fixed ratio, actual play is beam splitting
Effect.
Optics used of the invention, electricity device are few, low cost, and without complicated Active Optical Fiber Noise measarement loop, remote
Journey clock ratio pair and more advanced atomic clock field are likely to become a kind of relatively reliable experimental program.
Claims (6)
1. a kind of strange land bi-directional optical phase comparison method measured based on local side, it is characterised in that to separate the two of two places
Platform laser as light source, between with remote optical fiber link be connected, the output optical signal of two lasers is on same root optical fiber
It is simultaneously opposite to propagate, wherein the flashlight of a laser sent by optical fiber link to local side and with another laser beat
Frequently, at the same the flashlight of another laser be sent to behind distal end by reflection backtracking and with its own beat frequency, by right
The two beat signals enter line phase comparison, passive to eliminate optical fiber link common mode phase noise, to realize the ratio of two lasers
It is right.
2. a kind of device for realizing the strange land bi-directional optical phase comparison method measured described in claim 1 based on local side, its
It is characterised by, including optical texture and electricity part；The optical texture is by local side light path part, optical fiber link part and remote
Hold light path part composition；The electricity part is made up of detector and radio-frequency signal source；The radio-frequency signal source is penetrated including first
Frequency source signal (RF1) and the second radio-frequency signal source (RF2)；
Described local side light path part includes first laser device (Laser1), and the output of the first laser device (Laser1) connects
The input of the first X-type beam splitter (SMC1) is connected to, the input of the first described X-type beam splitter (SMC1) is also associated with electricity part
Detector (PD)；The output of the first X-type beam splitter (SMC1) is respectively arranged with the first faraday mirror (FM1) and the first sound
The input of optical modulator (AOM1)；
One end of the optical fiber link part is connected with the output of the first sound-optic modulator (AOM1) of local side light path part, separately
One end is connected with the output of the second sound-optic modulator (AOM2) of distal end light path part；
The distal end light path part includes second laser (Laser2), and the output of the second laser (Laser2) is connected with
The output of 2nd Y types beam splitter (SMC2)；Another output of the 2nd Y types beam splitter (SMC1) is provided with the second faraday
Mirror (FM2)；The input of the 2nd Y types beam splitter (SMC1) is connected with second sound-optic modulator (AOM2) input；
The first radio-frequency signal source (RF1) of the circuit part is connected with the radio frequency input of first sound-optic modulator (AOM1)；The
Two radio-frequency signal sources (RF2) are connected with the radio frequency input of second sound-optic modulator (AOM2).
3. device according to claim 2, it is characterised in that the splitting ratio of the first X-type beam splitter (SMC1) is 50/
50；The splitting ratio of the 2nd Y types beam splitter (SMC2) is 50/50.
4. device according to claim 2, it is characterised in that the optical fibre device used in the optical texture is single mode
Optical fibre device.
5. device according to claim 2, it is characterised in that the first sound-optic modulator (AOM1) and the second acousto-optic are adjusted
There is difference on the frequency that is fixed and not constituting multiple proportion between device (AOM2) processed.
6. the strange land bi-directional optical phase comparison method of a kind of claim 2 described device, it is characterised in that including following step
Suddenly：
1) output light of the first laser device (Laser1) of local side light path part first passes through the first X-type beam splitter (SMC1) and is divided into
Two beams, wherein light beam are reflected by the first faraday mirror (FM1) and enter the spy of electricity part along the first X-type beam splitter (SMC1)
Survey and beat frequency is waited in device (PD), another light beam is transferred into optical fiber link after first sound-optic modulator (AOM1) frequency displacement；
Continue to be transferred into distal end light path part in optical fiber link part；
2) distal end light path part by by light that optical fiber link is transmitted after second sound-optic modulator (AOM2) frequency displacement, will
Light after frequency displacement is divided into two beams by the 2nd Y types beam splitter (SMC2), wherein all the way by the second faraday mirror (FM2) reflection and edge
Backtracking, the return light returns to anti-by the first faraday mirror (FM1) in local side (Lab1) and the first X-type beam splitter (SMC1)
The optical signal penetrated closes beam beat frequency；At the same time, the output light of the second laser (Laser2) of distal end light path part passes through the 2nd Y
Enter optical fiber link after type beam splitter (SMC2) and second sound-optic modulator (AOM2) shift frequency to continue to transmit, reach local side
(Lab1) afterwards with closing beam beat frequency by the optical signal that the first faraday mirror (FM1) reflects in the first X-type beam splitter (SMC1).
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110601762A (en) * | 2019-09-18 | 2019-12-20 | 成都同相科技有限公司 | Radio frequency signal transmission method and system for realizing phase noise compensation |
| CN113098622A (en) * | 2021-03-14 | 2021-07-09 | 北京邮电大学 | Frequency transfer device based on bidirectional phase jitter compensation of optical frequency comb |
| CN114006660A (en) * | 2021-10-29 | 2022-02-01 | 上海交通大学 | Optical frequency transmission device and optical frequency transmission method based on time delay |
| CN114006655A (en) * | 2021-10-09 | 2022-02-01 | 上海交通大学 | Single-ended frequency comparison device and method based on time delay |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901743A (en) * | 2015-05-04 | 2015-09-09 | 中国科学院国家授时中心 | Fiber optical frequency transmission method based on compensation of remote end |
-
2017
- 2017-02-28 CN CN201710114390.9A patent/CN106953692B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901743A (en) * | 2015-05-04 | 2015-09-09 | 中国科学院国家授时中心 | Fiber optical frequency transmission method based on compensation of remote end |
Non-Patent Citations (2)
| Title |
|---|
| ANTHONY BERCY等: "Two-Way Optical Frequency Comparisons at 5*10^(-21) relative stability Over 100-km Telecommunication Network Fibers", 《PHYSICAL REVIEW A》 * |
| C. E. CALOSSO等: "Frequency transfer via a two-way optical phase comparison on a multiplexed fiber network", 《OPTICS LETTERS》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110601762A (en) * | 2019-09-18 | 2019-12-20 | 成都同相科技有限公司 | Radio frequency signal transmission method and system for realizing phase noise compensation |
| CN113098622A (en) * | 2021-03-14 | 2021-07-09 | 北京邮电大学 | Frequency transfer device based on bidirectional phase jitter compensation of optical frequency comb |
| CN114006655A (en) * | 2021-10-09 | 2022-02-01 | 上海交通大学 | Single-ended frequency comparison device and method based on time delay |
| CN114006660A (en) * | 2021-10-29 | 2022-02-01 | 上海交通大学 | Optical frequency transmission device and optical frequency transmission method based on time delay |
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| CN106953692B (en) | 2019-07-26 |
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