CN106452641B - It is a kind of using etc. time delays wavelength to transmit split-second precision signal device and method - Google Patents
It is a kind of using etc. time delays wavelength to transmit split-second precision signal device and method Download PDFInfo
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Abstract
The invention discloses a kind of time delays wavelength such as use to the device and method of transmission split-second precision signal, is related to technical field of photo communication and Time synchronization technique field.Technical key point：Including the first optical transmitting set, the first optical receiver, the first two-way wavelength division multiplexer, with etc. time delays wavelength to the simple optical fiber of characteristic, the second optical transmitting set, the second optical receiver and the second two-way wavelength division multiplexer.First optical transmitting set, the second optical receiver are connect with the first two-way wavelength division multiplexer；First two-way wavelength division multiplexer is connect with one end of the optical fiber；Second optical transmitting set, the first optical receiver are connect with the second two-way wavelength division multiplexer；Second two-way wavelength division multiplexer is connect with the other end of the optical fiber；The wavelength of the optical signal of the first optical transmitting set transmitting is λ1, the wavelength of the optical signal of the second optical transmitting set transmitting is λ2, λ1And λ2For the optical fiber etc. time delays wavelength pair.
Description
Technical field
The present invention relates to technical field of photo communication and Time synchronization technique field, more particularly to one kind being based on single fiber bi-directional wave
Division multiplexing system, using the method for equal a pair of of the wavelength transmission split-second precision signal of time delay value.
Background technology
Fiber optic communication network mainly uses two kinds of technologies of SDH (Optical synchronization digital system) and Packet Transport Network (PTN) at present.
On long-distance backbone network, in order to increase the bandwidth of network, wavelength-division multiplex (WDM) technology is generally used.Wavelength-division multiplex technique can
So that several times of the message capacity of optical fiber, tens times of ground is increased, has become the preferred option of long distance network high capacity transmission system at present.
In optic fiber beam sensor network, the clock frequencies of all switching nodes must all keep stringent synchronous with phase, can just make
Each switching node in network correctly and efficiently works.It can be seen that can the net synchronization capability of digital synchronous network normal work to communication network
Make most important.
The digital synchronous network in China uses the HMS hierarchical master-slave method of synchronization, i.e., single reference clock is by the same of synchronization distribution network
Step link controls the whole network.Synchronous net uses a series of classification clocks, per Primary Clock all with upper level clock or with level-one when
Clock synchronizes.
With the increase of fiber-optic transmission rate and the expansion of coverage area, optical fiber telecommunications system transmission performance can be by many
The influence of factor, principal element have：Optical sender, the influence of photoreceiver quality, the influence of optical fiber link power attenuation, temperature
Influence, the influence of dispersion, the influence of fiber nonlinear effect.These factors all can to optical fiber high-precision time dissemination system generate compared with
Big influence, especially dispersion.Dispersion is an important indicator of fiber optic materials, it is time delay during causing optical signal transmission
The main reason for inconsistent.Since the optical signal in optical fiber transmission includes different radio-frequency component, dispersion can lead to different frequencies
The optical signal of rate composition is propagated at different rates, pulse can be caused to broaden after certain distance, abnormal to cause signal
Become and receive the bit error rate and increases, most importantly it can lead to the asymmetry of optical transport time delay during optical fiber link time service, into
And time service precision is made to reduce.
In the time dissemination system based on SDH systems, since signal carrys out light chain used in transmission back when carrying out loop time delay test
Road is inconsistent in physical length, causes the test of optical signal one way propagation delay time there are large error, time service precision can only reach
To hundred nanoseconds (ns) magnitude；In the optical fiber time dissemination system based on single-fiber-optic two-way wavelength division multiplexing (WDM) technology, optical link is adopted back and forth
With same root optical fiber, although overcoming test error caused by physically optical link length is inconsistent back and forth, different wave length
Optical signal when carrying out transmission back in same root optical fiber, dispersion will keep the time delay of different wave length optical signal inconsistent, in certain journey
On degree or time service error can be caused.
Such as come up light echo link respectively using the optical signal of 1315nm and 1548nm in dispersion shifted optical fiber (SDF), it passes
When 50 kilometers of defeated distance, the transmission time delay difference of optical link will reach 113.6ns back and forth.If simply in above two system
By the half of loop time delay as one way propagation delay time, it is difficult to satisfaction high-precision (nanosecond order), over long distances (>=1000km's)
Time service requirement.
In another example existing wavelength-division multiplex system, sending direction and reception direction use the optical signal of two kinds of different wave lengths,
I.e. if sending direction uses the wavelength (100km time delays are 489761.95ns) of 1550.52nm, recipient to use 1550.12nm
Wavelength (100km time delays are 489761.129ns), then for the two optical wavelength, what 100km transmission links introduced
Time delay asymmetry is 6.6ns.If transmitting 1000km, the time delay asymmetry introduced is up to 66ns, and this time delay is not
Symmetry can carry out the transmission belt of split-second precision signal very serious influence.
Therefore, in high-precision time dissemination system, when different wave length optical signal how to be overcome to be transmitted in same root optical fiber
Prolong the inconsistent time service error brought, is that existing fiber time service mode solves the problems, such as not yet.
Invention content
For existing wavelength-division multiplex system when transmitting split-second precision signal in the presence of the dispersion shadow by different wave length
Loud there are time delays to differ, the problem for causing transmission precision not high, and the invention discloses a kind of time delays wavelength such as use to transmission
The method of split-second precision signal is transmitted that is, in single-fiber-optic two-way wavelength division multiplexing system using equal a pair of of the wavelength of time delay value
The method of split-second precision signal.
The goal of the invention of the present invention is realized by following technical proposals：
The present invention provides a kind of time delays wavelength such as use to the device of transmission split-second precision signal, including first first
Optical transmitting set, the first optical receiver, the first two-way wavelength division multiplexer, with etc. time delays wavelength to the simple optical fiber of characteristic,
Second optical transmitting set, the second optical receiver and the second two-way wavelength division multiplexer.
First optical transmitting set, the second optical receiver are connect with the first two-way wavelength division multiplexer；First single fiber
Bidirectional wavelength division multiplexing device is connect with one end of the optical fiber；
Second optical transmitting set, the first optical receiver are connect with the second two-way wavelength division multiplexer；Second single fiber
Bidirectional wavelength division multiplexing device is connect with the other end of the optical fiber；
The wavelength of the optical signal of the first optical transmitting set transmitting is λ1, the wavelength of the optical signal of the second optical transmitting set transmitting
For λ2, λ1And λ2For the optical fiber etc. time delays wavelength pair.
Further, the time delays wavelength such as described refers to zero-dispersion wavelength λ with the optical fiber to characteristic0Centered on, there is
Meet λ1＜ λ0＜ λ2Two wavelength Xs1And λ2, the time delay value that the optical signal of the two wavelength transmits in the optical fiber is equal.
Further, the optical fiber be optical fiber G.652, optical fiber G.653, optical fiber G.654 or optical fiber G.655.
Further, the optical fiber be optical fiber G.652, wavelength X1For 1290nm (or 1291nm), wavelength X2For 1330nm
(or 1331nm).Certainly, other wavelength can also be used other than this reciprocity time delay wavelength pair in addition to 1290nm and 1330nm
Etc. time delays wavelength pair.
The present invention also provides the time delays wavelength such as another use to the device of transmission split-second precision signal, including first
Optical transmitting set, the first optical receiver, the first wavelength division multiplexer, the first Wave decomposing multiplexer, with etc. time delays wavelength to characteristic
Simple optical fiber, the second optical transmitting set, the second optical receiver, the second wavelength division multiplexer and the second Wave decomposing multiplexer；
First optical transmitting set is connect with the first wavelength division multiplexer, and the second optical receiver and the first Wave decomposing multiplexer connect
It connects；First wavelength division multiplexer, the first Wave decomposing multiplexer are connect with one end of the optical fiber；
Second optical transmitting set is connect with the second wavelength division multiplexer, and the first optical receiver and the second Wave decomposing multiplexer connect
It connects；Second wavelength division multiplexer, the second Wave decomposing multiplexer are connect with the other end of the optical fiber；
First optical transmitting set, the second optical transmitting set emit the optical signal of at least two-way different wave length, and first respectively
Have in each road optical signal of optical transmitting set transmitting in the wavelength of optical signal all the way and each road optical signal of the second optical transmitting set transmitting
Optical signal all the way the wavelength time delays wavelength pair such as each other；The optical signal of the wavelength time delays wavelength pair such as each other is used for transmission high-precision
Time signal.
Further, the wavelength of the first via optical signal of the first optical transmitting set transmitting is 1560.61nm, the second road optical signal
Wavelength is 1559.79nm, and the wavelength of third road optical signal is 1196nm；The wave of the first via optical signal of second optical transmitting set transmitting
The wavelength of a length of 1558.98nm, the second road optical signal are 1558.17nm, and the wavelength of third road optical signal is 1428nm；Wherein
1196nm and 1428nm waits delay wavelength pair for the optical fiber.Certainly, this reciprocity time delay wavelength in addition to 1196nm and 1428nm
To except, can also use other wavelength etc. time delays wavelength pair.
The present invention also provides a kind of method of the time delays wavelength such as use to transmitting split-second precision signal, including：
Step 1：Using with etc. transmission medium of the time delays wavelength to the optical fiber of characteristic as split-second precision signal；
Step 2：It is respectively λ to select wavelength1And λ2Optical signal respectively as sending direction and receive direction transmission it is high-precision
Spend the optical signal of time signal, wavelength λ1And λ2Two ways of optical signals in the optical fiber propagation delay time it is equal.
By using above technical solution, the present invention has advantageous effect below：It solves and is based on wavelength-division multiplex skill
In the optical fiber time dissemination system of art, the optical signal time delay caused by dispersion for transmitting different wave length is inconsistent, and time service precision is made to decline
The problem of.It selects the wavelength with equal delay characters to two operation wavelengths as single-fiber-optic two-way wavelength division multiplexing system, utilizes
This pair of of wavelength has characteristic of equal time delay, can eliminate the optical signal transmission belt over the same fiber due to different wave length
The delay inequality come can not only improve the precision of optical fiber transmission time signal, realize remote (>=1000km), high-precision (≤1
Nanosecond) optical fiber time service, and can also significantly improve optical fiber it is influenced by ambient temperature after its length and variations in refractive index and
Caused propagation delay time variation helps to realize the optical fiber transmission of vast capacity.Due to etc. time delays wavelength pair two wavelength it
Between wavelength spacing difference it is larger, it is easier to design and realize divide the two wavelength filter, and with the two wavelength
The wavelength-division multiplex and demultiplexer to match.
Description of the drawings
Fig. 1 is the relational graph of G.652 time delay and wavelength in optical fiber.
Fig. 2 is the relational graph of the G.653 time delay of optical fiber and wavelength.
Fig. 3 is coarse wavelength division multiplexing (CWDM) single fiber bi-directional optical transmission system structural schematic diagram.
Fig. 4 is 1290nm and structural schematic diagrams of the 1330nm as single fiber bi-directional transmission wavelength.
Fig. 5 is 1196nm and structural schematic diagrams of the 1428nm as single fiber bi-directional transmission wavelength.
Fig. 6 is dense wave division multipurpose (DWDM) single fiber bi-directional optical transmission system structural schematic diagram.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with specific embodiment, to this
Invention is described in further detail.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
About etc. time delays wavelength to characteristic
Etc. time delays wavelength refer to zero-dispersion wavelength λ with optical fiber to characteristic0Centered on, there is meet λ1＜ λ0And λ2＞ λ0
Two wavelength Xs1And λ2, the time delay value corresponding to the two wavelength is just equal (i.e. time delay difference is approximately zero), therefore by λ1
And λ2The time delays wavelength pair such as referred to as.
By taking the Standard single-mode fiber of domestic most widely used model G.652 at present as an example.Its zero-dispersion wavelength exists
It is the minimum that decays at 1550nm in wavelength, but have larger positive dispersion at 1310nm, about 16.5ps/ (nm.km), work
1310nm both can be selected in wavelength, and 1550nm also can be selected.This optical fiber is current most popular optical fiber, and China has been laid
Optical fiber, the optical cable overwhelming majority be all this type optical fiber.Standard single-mode fiber G.652 in, time delay with wavelength change curve
As shown in Figure 1.
It will be seen from figure 1 that in G.652 optical fiber, if with the zero-dispersion wavelength λ corresponding to zero dispersion point0=
Centered on 1310nm, obvious symmetrical feature is showed, less than λ0With more than λ0Wave-length coverage in, can look for
Two wavelength equal to time delay value, the two wavelength be known as etc. time delays wavelength pair.Such as：1196nm and 1428nm, 1230nm
With 1394nm, 1239nm and 1385nm ..., 1264nm and 1360nm, 1277nm and 1347nm, 1294nm and 1330nm etc. at
To wavelength the time delays wavelength pair such as be all, the time delay value corresponding to two wavelength of these wavelength pair is identical, and (delay inequality is close
It is seemingly zero).If transmitting split-second precision signal using two wavelength of the time delays wavelength pair such as these, i.e., by the two wavelength
Respectively as the bidirectional transmit-receive operation wavelength of single-fiber-optic two-way wavelength division multiplexing optical transmission system, then it is on fiber transmission link
Time delay value is identical, and delay inequality is approximately zero, counteracts the delay inequality of dispersion introducing.
G.653 for dispersion shifted optical fiber, time delay and the relationship of wavelength are as shown in Figure 2.G.652 with Standard single-mode fiber
Delay character compare, due to being G.653 dispersion shifted optical fiber, zero dispersion point is displaced at 1550.52nm, and abbe number is
0.8ps/ (nm.km), therefore the two is variant, chromatic dispersion gradient is also different, but the same characteristic etc. with time delays wavelength pair.
G.655 for non-zero dispersion displacement optical fiber, dispersion shift central point is in 1260nm~1650nm wave-length coverages
It adjusts, abbe number is 4ps/ (nm.km), the characteristic of time delays wavelength pair such as equally exists, and only the slope of curve wants big by one
A bit.(G.653, G.655 the time delay value of optical fiber can accurately measure in laboratory).Therefore, method of the invention is not only
Suitable for G.652 optical fiber, and be also applied for G.653, G.654, G.655 optical fiber etc. have etc. time delays wavelength own to characteristic
Optical fiber.
Next the structure and working principle of two kinds of devices of the invention is illustrated in conjunction with Fig. 3~6.
Fig. 3 shows the first embodiment of apparatus of the present invention, including the first optical transmitting set, the first optical receiver, the first list
Fine bidirectional wavelength division multiplexing device, with etc. time delays wavelength to the simple optical fiber of characteristic, the second optical transmitting set, the second optical receiver and
Two two-way wavelength division multiplexers.
First optical transmitting set, the second optical receiver are connect with the first two-way wavelength division multiplexer；First single fiber
Bidirectional wavelength division multiplexing device is connect with one end of the optical fiber；Second optical transmitting set, the first optical receiver with the second single fiber
Bidirectional wavelength division multiplexing device connects；Second two-way wavelength division multiplexer is connect with the other end of the optical fiber；The first light hair
The wavelength of the optical signal of emitter transmitting is λ1, the wavelength of the optical signal of the second optical transmitting set transmitting is λ2, λ1And λ2For the optical fiber
Etc. time delays wavelength pair.
In the present embodiment, when the optical fiber be optical fiber G.652 when, wavelength X may be used1For 1290nm, wavelength X2For
The two ways of optical signals of 1330nm is as work optical signal.Have the optical transmitting set of 1290nm and the light hair of 1330nm on the market at present
Emitter, without in addition customization, it is convenient to realize.Certainly, other than this reciprocity time delay wavelength pair, aforementioned enumerate can also be used
The time delays wavelength pair such as other.
It is single that the optical signal that the wavelength that the transmitting of first optical transmitting set carries split-second precision signal is 1290nm is sent into first
It in fine bidirectional wavelength division multiplexing device, is then put on optical fiber and transmits, connect by the first light after the second two-way wavelength division multiplexer
Device is received to receive；At the same time the second optical transmitting set transmitting carry split-second precision signal wavelength be 1330nm optical signal simultaneously
It is sent in the second two-way wavelength division multiplexer, by optical fiber, the first two-way wavelength division multiplexer, by the second light-receiving
Device receives.
Since 1290nm, 1330nm are the reciprocity time delay wavelength pair of optical fiber G.652, receive direction and direction occurs
Delay inequality be zero.
Fig. 5, which is shown, uses the time delays such as another pair wavelength to for the structural schematic diagram of the device of operation wavelength.
Referring to Fig. 6, second embodiment of the invention include the first optical transmitting set, the first optical receiver, the first wavelength division multiplexer,
First Wave decomposing multiplexer, with etc. time delays wavelength to the simple optical fiber of characteristic, the second optical transmitting set, the second optical receiver,
Two wavelength division multiplexers and the second Wave decomposing multiplexer.
First optical transmitting set is connect with the first wavelength division multiplexer, and the second optical receiver and the first Wave decomposing multiplexer connect
It connects；First wavelength division multiplexer, the first Wave decomposing multiplexer are connect with one end of the optical fiber；Second optical transmitting set and
Two wavelength division multiplexers connect, and the first optical receiver is connect with the second Wave decomposing multiplexer；Second wavelength division multiplexer, the second Wave Decomposition
Multiplexer is connect with the other end of the optical fiber.
First optical transmitting set, the second optical transmitting set emit the optical signal of at least two-way different wave length, and first respectively
Have in each road optical signal of optical transmitting set transmitting in the wavelength of optical signal all the way and each road optical signal of the second optical transmitting set transmitting
Optical signal all the way wavelength composition etc. time delays wavelength pair；The optical signal of the wavelength time delays wavelength pair such as each other is used for transmission high-precision
Time signal.
For example, the wavelength of the optical signal all the way of the first optical transmitting set transmitting is 1560.61nm, the wavelength of the second road optical signal
Wavelength for 1559.79nm, third road optical signal is 1196nm, and third road optical signal is used for transmission split-second precision signal；The
The wavelength of the optical signal all the way of two optical transmitting sets transmitting is 1558.98nm, and the wavelength of the second road optical signal is 1558.17nm, the
The wavelength of three road optical signals is 1428nm, and third road optical signal is used for transmission split-second precision signal；Wherein 1196nm with
1428nm waits delay wavelength pair for the optical fiber.Its commplementary wave length is used for transmission other service signals.Certainly, in addition to 1196nm with
Except this reciprocity time delay wavelength pair of 1428nm, can also use other wavelength etc. time delays wavelength pair.
The operation principle of the present embodiment is such, and the first optical transmitting set emits the optical signal of three road different wave lengths, wherein
The optical signal that wavelength is 1196nm carries split-second precision signal, remaining two paths of signals carries other service signals.Three road light letters
It number is output on optical fiber and to transmit after the first wavelength division multiplexer, the second Wave decomposing multiplexer receives multiplexed signal and simultaneously solves
Three road optical signals, last three road the first optical receiver of optical signals receive.The second optical transmitting set emits three road different wave lengths simultaneously
Optical signal, the optical signal that medium wavelength is 1428nm carries split-second precision signal, remaining two ways of optical signals carries other industry
Business signal, three road optical signals, which are output to after the second wavelength division multiplexer on optical fiber, to be transmitted, and the first Wave decomposing multiplexer receives multiple
Signal after simultaneously solves three road optical signals, and last three road the second optical receiver of optical signals receives.
The invention also discloses a kind of split-second precision method for transmitting signals suitable for wavelength-division multiplex system, specific to wrap
Include following step：Step 1: using have etc. transmission matchmaker of the time delays wavelength to the optical fiber of characteristic as split-second precision signal
Matter；Step 2: two wavelength Xs of the time delays such as selection1And λ2As sending direction and receive direction a pair of of wavelength, respectively as
The operation wavelength of split-second precision signal is transmitted in single-fiber-optic two-way wavelength division multiplexing system.
The present invention utilizes two wavelength Xs1And λ2With etc. time delays characteristic, solve single-fiber-optic two-way wavelength division multiplexing optical transport
In system the problem of the asymmetric time delay of the transmission link caused by dispersion.It realizes simply, is not required to increase any hardware cost, improve
The precision of time signal transmission.
Apparatus of the present invention include that the two kinds of single fiber bi-directional wavelength-divisions of coarse wavelength division multiplexing (CWDM) and dense wave division multipurpose (DWDM) are multiple
Use optical transmission system.Coarse wavelength division multiplexing refers to utilizing optical multiplexer by the wavelength multiplexing transmitted in different optical fiber a to optical fiber
Middle transmission, its channel are fewer than dense wave division multipurpose.Interval between CWDM system multiplexing wavelength is wider, generally 20nm,
And the interval between dwdm system reuse wavelengths is narrow, can be 0.4nm, 0.8nm, 1.6nm.Fig. 3,4,5 are multiple for thick wavelength-division
With (CWDM) single fiber bi-directional optical transmission system structural schematic diagram.Fig. 6 is dense wave division multipurpose (DWDM) single fiber bi-directional optical transport system
System structural schematic diagram.
Obviously, the whether single fiber bi-directional optical transmission system of coarse wavelength division multiplexing or dense wave division multipurpose, all there is by
The propagation delay time value different problems caused by wavelength difference, this time delay asymmetry will to the transmission of split-second precision signal
Generate very serious influence.The present invention is exactly to believe split-second precision to reduce this time delay asymmetry that dispersion is brought
Number transmission influence, it is proposed that it is a kind of to use the reference point centered on zero-dispersion wavelength, select its left and right time delay value equal
A pair of of wavelength is come the method for transmitting split-second precision signal.
Several preferred embodiments of the present invention have shown and described in above description, but as previously described, it should be understood that the present invention
Be not limited to form disclosed herein, be not to be taken as the exclusion to other embodiments, and can be used for it is various other combination,
Modification and environment, and the above teachings or related fields of technology or knowledge can be passed through in the scope of the invention is set forth herein
It is modified.And changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, then it all should be in this hair
In the protection domain of bright appended claims.
Claims (8)
1. a kind of time delays wavelength such as use are to the device of transmission split-second precision signal, which is characterized in that including the first light emitting
Device, the first optical receiver, the first two-way wavelength division multiplexer, with etc. simple optical fiber, second light of the time delays wavelength to characteristic
Transmitter, the second optical receiver and the second two-way wavelength division multiplexer；
First optical transmitting set, the second optical receiver are connect with the first two-way wavelength division multiplexer；First single fiber bi-directional
Wavelength division multiplexer is connect with one end of the optical fiber；
Second optical transmitting set, the first optical receiver are connect with the second two-way wavelength division multiplexer；Second single fiber bi-directional
Wavelength division multiplexer is connect with the other end of the optical fiber；
The wavelength of the optical signal of the first optical transmitting set transmitting is λ1, the wavelength of the optical signal of the second optical transmitting set transmitting is λ2,
λ1And λ2For the optical fiber etc. time delays wavelength pair, the time delays wavelength such as described refer to the zero-dispersion wavelength of the optical fiber to characteristic
λ0Centered on, there is meet λ1<λ0<λ2Or λ2<λ0<λ1Two wavelength Xs1And λ2, the optical signal of the two wavelength is described
The time delay value transmitted in optical fiber is equal.
2. a kind of time delays wavelength such as use according to claim 1 are to the device of transmission split-second precision signal, feature
Be, the optical fiber be optical fiber G.652, optical fiber G.653, optical fiber G.654 or optical fiber G.655.
3. a kind of time delays wavelength such as use according to claim 1 are to the device of transmission split-second precision signal, feature
Be, the optical fiber be optical fiber G.652, wavelength X1For 1290nm, wavelength X2For 1330nm.
4. a kind of time delays wavelength such as use are to the device of transmission split-second precision signal, which is characterized in that including the first light emitting
Device, the first optical receiver, the first wavelength division multiplexer, the first Wave decomposing multiplexer, with etc. time delays wavelength to the single light of characteristic
Fibre, the second optical transmitting set, the second optical receiver, the second wavelength division multiplexer and the second Wave decomposing multiplexer；
First optical transmitting set is connect with the first wavelength division multiplexer, and the second optical receiver is connect with the first Wave decomposing multiplexer；
First wavelength division multiplexer, the first Wave decomposing multiplexer are connect with one end of the optical fiber；
Second optical transmitting set is connect with the second wavelength division multiplexer, and the first optical receiver is connect with the second Wave decomposing multiplexer；
Second wavelength division multiplexer, the second Wave decomposing multiplexer are connect with the other end of the optical fiber；
First optical transmitting set, the second optical transmitting set emit the optical signal of at least two-way different wave length respectively, and the first light is sent out
There is one in the wavelength of optical signal all the way and each road optical signal of the second optical transmitting set transmitting in each road optical signal of emitter transmitting
The wavelength of the road optical signal time delays wavelength pair such as each other；The optical signal of the wavelength time delays wavelength pair such as each other is used for transmission split-second precision
Signal, the time delays wavelength such as described is to the zero-dispersion wavelength λ that characteristic refers to the optical fiber0Centered on, there is meet λ1<λ0<λ2
Or λ2<λ0<λ1Two wavelength Xs1And λ2, the time delay value that the optical signal of the two wavelength transmits in the optical fiber is equal.
5. a kind of time delays wavelength such as use according to claim 4 are to the device of transmission split-second precision signal, feature
Be, the optical fiber be optical fiber G.652, optical fiber G.653, optical fiber G.654 or optical fiber G.655.
6. a kind of time delays wavelength such as use according to claim 4 are to the device of transmission split-second precision signal, feature
It is, the wavelength of the first via optical signal of the first optical transmitting set transmitting is 1560.61nm, and the wavelength of the second road optical signal is
The wavelength of 1559.79nm, third road optical signal are 1196nm；The wavelength of first via optical signal of second optical transmitting set transmitting is
The wavelength of 1558.98nm, the second road optical signal are 1558.17nm, and the wavelength of third road optical signal is 1428nm；Wherein 1196nm
It is the equal delay wavelength pair of the optical fiber with 1428nm.
7. a kind of method of the time delays wavelength such as use to transmitting split-second precision signal, which is characterized in that including：
Step 1：Using with etc. transmission medium of the time delays wavelength to the optical fiber of characteristic as split-second precision signal；
Step 2：It is respectively λ to select wavelength1And λ2Optical signal respectively as sending direction and receive direction transmission high-precision when
Between signal optical signal, wavelength λ1And λ2Two ways of optical signals in the optical fiber propagation delay time it is equal, and λ1And λ2It is described
Optical fiber etc. time delays wavelength pair, the time delays wavelength such as described is to the zero-dispersion wavelength λ that characteristic refers to the optical fiber0Centered on, it deposits
Meeting λ1<λ0<λ2Or λ2<λ0<λ1Two wavelength Xs1And λ2, the optical signal of the two wavelength transmits in the optical fiber
Time delay value it is equal.
8. a kind of methods of the time delays wavelength to transmitting split-second precision signal such as use according to claim 7, feature
Be, the optical fiber be optical fiber G.652, optical fiber G.653, optical fiber G.654 or optical fiber G.655.
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| WO2018218511A1 (en) * | 2017-05-31 | 2018-12-06 | 华为技术有限公司 | Time delay measurement method and site |
| CN109302258B (en) * | 2018-12-13 | 2021-06-01 | 中国科学院国家授时中心 | Automatic compensation device and method for time delay deviation in optical fiber time transmission |
| CN109799580B (en) * | 2019-01-11 | 2020-08-04 | 中国科学院上海光学精密机械研究所 | Double time delay line for single-fiber bidirectional transmission |
| CN112187346B (en) * | 2020-09-18 | 2022-01-11 | 中国人民解放军海军工程大学 | Round-trip time delay difference estimation method for optical fiber time transmission under temperature change |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008093600A1 (en) * | 2007-01-29 | 2008-08-07 | Nec Corporation | Time synchronization system, time synchronization method, and program |
| WO2011085585A1 (en) * | 2010-07-23 | 2011-07-21 | 华为技术有限公司 | Method and device for time synchronization |
| CN102394741A (en) * | 2011-12-13 | 2012-03-28 | 杭州华三通信技术有限公司 | Method for realizing precision time synchronization based on IEEE1588 and apparatus thereof |
| CN103546225A (en) * | 2013-10-23 | 2014-01-29 | 中国电子科技集团公司第三十四研究所 | Phototiming network timing system and timing method |
-
2015
- 2015-08-04 CN CN201510469151.6A patent/CN106452641B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008093600A1 (en) * | 2007-01-29 | 2008-08-07 | Nec Corporation | Time synchronization system, time synchronization method, and program |
| WO2011085585A1 (en) * | 2010-07-23 | 2011-07-21 | 华为技术有限公司 | Method and device for time synchronization |
| CN102394741A (en) * | 2011-12-13 | 2012-03-28 | 杭州华三通信技术有限公司 | Method for realizing precision time synchronization based on IEEE1588 and apparatus thereof |
| CN103546225A (en) * | 2013-10-23 | 2014-01-29 | 中国电子科技集团公司第三十四研究所 | Phototiming network timing system and timing method |
Non-Patent Citations (1)
| Title |
|---|
| 单模光纤的波长色散及其补偿原理;陈炳炎;《2 01 1’光纤光缆及光器件产品技术研讨会》;20120621;第58-69页 * |
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Inventor after: Meng Zhicai Inventor after: Qin Guping Inventor after: Li Zhongwen Inventor after: Peng Liangfu Inventor after: Li Yousheng Inventor after: Li Gaofeng Inventor after: Hou Bingan Inventor after: Li Lin Inventor before: Meng Zhicai Inventor before: Li Zhongwen Inventor before: Peng Liangfu Inventor before: Li Yousheng Inventor before: Li Gaofeng Inventor before: Hou Bingan Inventor before: Li Lin |
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Denomination of invention: A device and method for transmitting high-precision time signals using equal time delay wavelength pairs Granted publication date: 20180720 Pledgee: China Construction Bank Co.,Ltd. Chengdu Jincheng Branch Pledgor: SICHUAN TAIFU GROUND BEIDOU TECHNOLOGY CO.,LTD. Registration number: Y2024980020271 |