CN107819516A - Multi-channel wide band microwave optical transmission chain transmitting terminal phase stabilizing device - Google Patents
Multi-channel wide band microwave optical transmission chain transmitting terminal phase stabilizing device Download PDFInfo
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- CN107819516A CN107819516A CN201711187530.1A CN201711187530A CN107819516A CN 107819516 A CN107819516 A CN 107819516A CN 201711187530 A CN201711187530 A CN 201711187530A CN 107819516 A CN107819516 A CN 107819516A
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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
- H04B10/40—Transceivers
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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
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/077—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
-
- 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
- H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
- H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
- H04B10/077—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
- H04B10/0775—Performance monitoring and measurement of transmission parameters
Abstract
The present invention provides a kind of multi-channel wide band microwave optical transmission chain transmitting terminal phase stabilizing device, including optical transmission chain, phase measurement pilot tone link, Time delay measurement pilot tone link and controller, the first optical signal and the multiplexed optical of the second optical signal that optical transmission chain should provide input optical signal and phase measurement pilot tone link and Time delay measurement pilot tone link pair are divided into multichannel spectroscopic signal and carry out channel transmission, for each road spectroscopic signal, it is transferred to receiving portion along optical fiber corresponding with the passage, input optical signal in receiving portion spectroscopic signal is output as output optical signal, first optical signal and the second optical signal are correspondingly fed back to phase measurement pilot tone link and Time delay measurement pilot tone link, with by phase measurement pilot tone link, Time delay measurement pilot tone link is accordingly to the phase difference of each paths, time difference measures；Controller is adjusted according to time difference measurements result and phase difference measurements control phase compensation block to the phase of each paths optical signal.
Description
Technical field
The invention belongs to microwave light transmission field, and in particular to a kind of multi-channel wide band microwave optical transmission chain transmitting terminal is steady
Phase device.
Background technology
Microwave optical transport technology is due to broadband, low-loss, distributing the excellent of flexible, anti-interference and low weight etc.
Gesture, it is highly suitable for the transmission and distribution of radiofrequency signal, particularly broadband high-frequency signals, in local oscillation signal transmission distribution, radio frequency
Distribution zooms out, phased array submatrix etc. is with a wide range of applications.Ensure single channel microwave light chain in such applications
Phase equalization between the phase stability and multichannel on road is to realize one of key technology of systemic-function.But optical transport
Medium optical fiber is influenceed that optical fiber equivalent length can be caused to change by external environment condition (temperature, vibration etc.) so that what is transmitted penetrates
Frequency signal phase is shaken, and the phase equalization of each interchannel is affected.
At present, realizing the steady phase method of microwave optical transmission chain mainly has two kinds：Passive penalty method and Active Compensation method.Quilt
Dynamic penalty method does not need feedback control, by way of being mixed cancellation, so as to offset the shake of RF phse, but is not suitable for
Broadband signal.Active Compensation method is actually an APC system, includes three big modules：Phase measurement module, phase
Position compensating module and controller.The phase of microwave optical transmission chain is measured by phase measurement module (such as phase discriminator, multiplier)
The amount of jitter of position, control algolithm (such as pid algorithm) is realized using controller, (such as adjustable optic fibre is delayed control phase compensation device
Line, adjustable wavelength laser, phase shifter etc.) feedback regulation is carried out to phase.The microwave based on Active Compensation method currently reported
Optical transmission chain is steady mutually not to consider broadband signal and the steady phase of multi channel signals yet.Although there are a variety of methods to be used for microwave light at present
The steady phase of transmission link, but existing steady phase technology still has the shortcomings that larger, and this is mainly manifested in following two aspects：
Mutually required first, being unsatisfactory for the steady of wide-band microwave optical link.In the prior art, passive penalty method is due to frequency mixer
Limitation Deng microwave device causes that point-frequency signal application can only be directed to.In Active Compensation method, high-precision phase measurement typically uses
Phase discriminator or the detecting way based on vector, are also only applicable to point-frequency signal, under wideband scenarios, the phase discrimination function of signal
It can not realize.
Second, it is unsatisfactory for the requirement of multichannel phase uniformity.Even if single channel wide-band microwave optical link can be implemented separately
It is steady mutually require, overall structure is also very complicated, and can only ensure that the phase of radiofrequency signal is consistent, it is impossible to ensures the letter of each passage
Number cycle is consistent.
The content of the invention
The present invention provides a kind of multi-channel wide band microwave optical transmission chain transmitting terminal phase stabilizing device, to solve steady phase skill at present
Art can not realize the problem of multi-channel wide band microwave light is surely mutually transmitted.
A kind of first aspect according to embodiments of the present invention, there is provided multi-channel wide band steady phase of microwave optical transmission chain transmitting terminal
Device, including optical transmission chain, phase measurement pilot tone link, Time delay measurement pilot tone link and controller, the optical transmission chain
The multiple receiving portions being connected including emitting portion and respectively by optical fiber with the emitting portion, the emitting portion pass through
Corresponding optical fiber forms an optical transport sublink, the phase measurement pilot tone link and Time delay measurement pilot tone with corresponding receiving portion
The transmitting terminal of link is corresponding to be supplied to the emitting portion by the first optical signal and the second optical signal, and the emitting portion is by first
Optical signal and the second optical signal, a branch of optical signal is multiplexed into together with its input optical signal, and the beam optical signal is divided into multichannel point
Optical signal, each road spectroscopic signal are transmitted to corresponding receiving portion by corresponding optical fiber, and for each receiving portion, it believes light splitting
Input optical signal in number is fed back to the first optical signal and the second optical signal by corresponding optical fiber as output light signal output
The emitting portion, the emitting portion, which correspondingly transmits first optical signal and the second optical signal to the phase measurement, to be led
The receiving terminal of frequency link and Time delay measurement pilot tone link；
The phase measurement pilot tone link is used for the first optical signal according to its transmitting terminal and receiving terminal, to each optical transport
The phase difference of sublink is measured and phase measurement is sent into the controller, and the Time delay measurement pilot tone link is used
In the second optical signal according to its transmitting terminal and receiving terminal, the time difference of each optical transport sublink is measured and by the time
Measurement result is sent to the controller；The controller is used for according to the time measurement result to the optical transport sublink
The phase of middle optical signal carries out coarse adjustment, and the phase of optical signal in the optical transport sublink is entered according to the phase measurement
Row fine tuning.
In a kind of optional implementation, in addition to gating component, the controller are used to control the gating component
Break-make so that the first optical signal that each receiving portion is fed back to transmits to the phase measurement successively from the emitting portion
Pilot tone link, the second optical signal that each receiving portion is fed back to transmits to the Time delay measurement successively from the emitting portion leads
Frequency link.
In another optional implementation, the emitting portion includes the first wavelength division multiplexer, optical branching device, multiple
Optical circulator and multiple phase compensation blocks, the corresponding input of first wavelength division multiplexer are respectively used to receive input light letter
Number, the first optical signal and the second optical signal, output end connect the first end of each optical circulator respectively by the optical branching device,
For each optical circulator, its second end connection corresponding phase compensating module, corresponding phase compensating module passes through optical fiber connection pair
Receiving portion is answered, the 3rd end of the optical circulator correspondingly connects phase measurement pilot tone link and Time delay measurement the pilot tone link
Receiving terminal；
First wavelength division multiplexer is multiplexed into light beam being inputted optical signal, the first optical signal and the second optical signal
After signal, the beam optical signal transmission is given to the optical branching device, the beam optical signal is divided into multichannel light splitting letter by the optical branching device
Number, for every road spectroscopic signal, it is delivered to the first end of corresponding optical circulator, then from the second end of corresponding optical circulator
Export and give corresponding phase compensating module, the phase compensation block after phase compensation is carried out to it along corresponding optical fiber transmit to
Corresponding receiving portion；
For each receiving portion, it is using the input optical signal in spectroscopic signal as output light signal output, by first
Optical signal and the second optical signal feed back to the phase compensation block by optical fiber and carry out phase compensation, hereafter the first light letter
Number and the second optical signal be transferred to the second end of corresponding optical circulator, from the three-polar output of corresponding optical circulator and corresponded to
Transmit the receiving terminal to the phase measurement pilot tone link and Time delay measurement pilot tone link.
In another optional implementation, for each receiving portion, it includes reflection bandstop filter, the reflection
Mode filter is used to, using the input optical signal in spectroscopic signal as output light signal output, the first optical signal and the second light be believed
Number the emitting portion is fed back to by corresponding optical fiber.
In another optional implementation, in addition to user's optical sender and multiple user's photoreceivers, it is described
User transmitter is supplied to the emitting portion, user's light receiving signal for radiofrequency signal to be converted into input optical signal
Output optical signal for corresponding receiving portion to be provided is converted into radiofrequency signal output.
In another optional implementation, the phase measurement pilot tone link includes the first optical sender, point frequency is led
Frequency source, phase measurement module and the first photoreceiver, the point frequency pilot source are used to point-frequency signal being sent respectively to described the
The point-frequency signal is converted to first optical signal and carried by one optical sender and phase measurement module, first optical sender
Supply the emitting portion；First photoreceiver carries for the first optical signal fed back to be converted into the first measurement signal
Supply the phase measurement module；The phase measurement module is used for according to the point-frequency signal and the first measurement signal, to each
The phase difference of individual optical transport sublink measures and phase measurement is sent into the controller.
In another optional implementation, the Time delay measurement pilot tone link includes the second optical sender, pulse is led
Frequency source, time measurement module and the second photoreceiver, the pulse guide-frequency source are used to pulse signal being respectively supplied to described the
Two optical senders and time measurement module, second optical sender carry for the pulse signal to be converted into the second optical signal
Supply the emitting portion；Second photoreceiver carries for the second optical signal fed back to be converted into the second measurement signal
Service time measurement module；The time measurement module is used for according to the pulse signal and the second measurement signal, to each light
The time difference of transmission sublink measures and time measurement result is sent into the controller.
In another optional implementation, the gating component includes array of photoswitch and the second wavelength-division demultiplexes
Device, the array of photoswitch are connected with the emitting portion, and the controller is used for the break-make for controlling the array of photoswitch, with
The first optical signal that each receiving portion is fed back to and the second optical signal is set to be transmitted successively to described second from the emitting portion
First optical signal and the second optical signal are correspondingly transferred to the phase by Wave decomposing multiplexer, second Wave decomposing multiplexer
The receiving terminal of position measurement pilot tone link and Time delay measurement pilot tone link.
In another optional implementation, the transmitting terminal of the phase measurement pilot tone link and the first light of receiving terminal
Signal phase difference is twice of input and output optical signal phase difference in corresponding optical transport sublink；The Time delay measurement pilot tone link
Transmitting terminal and receiving terminal the second optical signal time difference be input and output optical signal in corresponding optical transport sublink time
Twice of difference.
In another optional implementation, time difference measurements are that the time difference on the edge of two signals is measured, phase
Potential difference measurement is that the phase difference of two signals is measured.
The beneficial effects of the invention are as follows：
1st, the present invention is surveyed by introducing Time delay measurement pilot tone link, phase measurement pilot tone link, Time delay measurement module, phase
Amount module measures delay jitter and phase jitter indirectly, solves the problems, such as to be difficult to by user link direct measurement；Simultaneously
By double measurements to delay and phase, and combination controller and phase compensation block can both ensure single channel phase stabilization, again
The phase and cycle uniformity between multichannel can be ensured, thus the present invention can be used for realizing the multi-channel wide band steady phase of microwave light
Transmission；
2nd, the present invention uses gating component, each paths is accessed phase measurement pilot tone link and Time delay measurement in turn successively
Pilot tone link, it can avoid for setting corresponding phase measurement pilot tone link and Time delay measurement pilot tone chain respectively per paths
Road, so as to reduce the volume of whole device, reduce cost.
Brief description of the drawings
Fig. 1 is block diagram of the multi-channel wide of the present invention with microwave optical transmission chain transmitting terminal phase stabilizing device；
Fig. 2 is one embodiment structural representation of the multi-channel wide of the present invention with microwave optical transmission chain transmitting terminal phase stabilizing device
Figure；
Fig. 3 is time difference measurements schematic diagram of the present invention；
Fig. 4 is phase difference measurement schematic diagram of the present invention.
Embodiment
In order that those skilled in the art more fully understand the technical scheme in the embodiment of the present invention, and make of the invention real
Apply the above-mentioned purpose of example, feature and advantage can be more obvious understandable, below in conjunction with the accompanying drawings to technical side in the embodiment of the present invention
Case is described in further detail.
In the description of the invention, unless otherwise prescribed with restriction, it is necessary to which explanation, term " connection " should do broad sense reason
Solution, for example, it may be mechanical connection or electrical connection or the connection of two element internals, can be joined directly together, also may be used
To be indirectly connected by intermediary, for the ordinary skill in the art, can understand as the case may be above-mentioned
The concrete meaning of term.
It is block diagram of the multi-channel wide of the present invention with microwave optical transmission chain transmitting terminal phase stabilizing device referring to Fig. 1.Should
Multi-channel wide band microwave optical transmission chain transmitting terminal phase stabilizing device can include the phase measurement pilot tone link of optical transmission chain 110/
120th, Time delay measurement pilot tone link 130 and controller 140, the optical transmission chain 110 include emitting portion 111 and led to respectively
Multiple receiving portions 113 that optical fiber 112 is connected with the emitting portion 111 are crossed, the emitting portion 111 passes through corresponding optical fiber
112 form an optical transport sublink with corresponding receiving portion 113, and the phase measurement pilot tone link 120 and Time delay measurement are led
The transmitting terminal of frequency link 130 is corresponding to be supplied to the emitting portion 111, the emission part by the first optical signal and the second optical signal
Points 111 by the first optical signal and the second optical signal, and a branch of optical signal is multiplexed into together with its input optical signal, and by the beam optical signal
It is divided into multichannel spectroscopic signal, each road spectroscopic signal is transmitted to corresponding receiving portion 113 by corresponding optical fiber 112, connect for each
Receiving portions 113, it believes the first optical signal and the second light using the input optical signal in spectroscopic signal as output light signal output
Number the emitting portion 111 is fed back to by corresponding optical fiber 112, the emitting portion 111 is by first optical signal and second
Optical signal correspondingly transmits the receiving terminal to the phase measurement pilot tone link 120 and Time delay measurement pilot tone link 130；The phase
Pilot tone link 120 is measured for the first optical signal according to its transmitting terminal and receiving terminal, to the phase of each optical transport sublink
Difference measures and phase measurement is sent into the controller 140, and the Time delay measurement pilot tone link 130 is used for basis
Second optical signal of its transmitting terminal and receiving terminal, the time difference of each optical transport sublink is measured and by time measurement knot
Fruit is sent to the controller 140；The controller 140 is used for according to the time measurement result to the optical transport sublink
The phase of middle optical signal carries out coarse adjustment, and the phase of optical signal in the optical transport sublink is entered according to the phase measurement
Row fine tuning.
Phase stability of the multi-channel wide with microwave optical transmission chain and phase equalization are evaluation multichannel wide-band microwaves
The important indicator of optical transmission chain performance.The present invention is by introducing Time delay measurement pilot tone link, phase measurement pilot tone link, delay
Measurement module, phase measurement module come measures delay jitter and phase jitter indirectly, solve be difficult to it is direct by user link
The problem of measurement.Simultaneously by double measurements to delay and phase, and combination controller and phase compensation block can both ensure
Single channel phase stabilization, phase and cycle uniformity between multichannel are ensured that, thus the present invention can be used for realizing more logical
Road wide-band microwave light surely mutually transmits.In addition, multi-channel wide band microwave optical transmission chain transmitting terminal phase stabilizing device can also include
Gating component 150, the controller 140 is used for the break-make for controlling the gating component 150, so that each receiving portion 113 is anti-
The first optical signal being fed back to transmits to the phase measurement pilot tone link 120, each acceptance division successively from the emitting portion 111
113 the second optical signals fed back to are divided to be transmitted successively to the Time delay measurement pilot tone link 130 from the emitting portion 111.This
Invention uses gating component, each paths is accessed phase measurement pilot tone link and Time delay measurement pilot tone link in turn successively, can
To avoid setting corresponding phase measurement pilot tone link and Time delay measurement pilot tone link respectively for each optical transport sublink, from
And the volume of whole device can be reduced, reduce cost, and only gate work in the case where partial light transmission sublink works
The optical transport sublink of work carries out phase and Time delay measurement, can reduce time of measuring, put forward high stable phase efficiency.
Referring to Fig. 2, for a kind of multi-channel wide of the present invention, one with microwave optical transmission chain transmitting terminal phase stabilizing device implements
Example structural representation.In the present embodiment, the emitting portion 111 includes the first wavelength division multiplexer, optical branching device, multiple ring of light rows
Device and multiple phase compensation blocks, the corresponding input of first wavelength division multiplexer are respectively used to receive input optical signal, the
One optical signal and the second optical signal, output end connect the first end of each optical circulator by the optical branching device respectively, for
Each optical circulator, its second end connection corresponding phase compensating module, corresponding phase compensating module connect by the way that optical fiber connection is corresponding
Receiving portions, the 3rd end of the optical circulator correspondingly connect connecing for the phase measurement pilot tone link and Time delay measurement pilot tone link
Receiving end；First wavelength division multiplexer be inputted optical signal, the first optical signal and the second optical signal be multiplexed into light beam letter
After number, the beam optical signal transmission is given to the optical branching device, the beam optical signal is divided into multichannel spectroscopic signal by the optical branching device,
For every road spectroscopic signal, it is delivered to the first end of corresponding optical circulator, then defeated from the second end of corresponding optical circulator
Go out to give corresponding phase compensating module, the phase compensation block is transmitted to right after phase compensation is carried out to it along corresponding optical fiber
The receiving portion answered；For each receiving portion, it, will using the input optical signal in spectroscopic signal as output light signal output
First optical signal and the second optical signal feed back to the phase compensation block by corresponding optical fiber and carry out phase compensation, hereafter described
First optical signal and the second optical signal are transferred to the second end of corresponding optical circulator, from the three-polar output of corresponding optical circulator
And by the corresponding receiving terminal transmitted to the phase measurement pilot tone link and Time delay measurement pilot tone link.
For each receiving portion, it includes reflection bandstop filter, and the reflection bandstop filter is used in spectroscopic signal
Input optical signal as output light signal output, the first optical signal and the second optical signal are fed back to by corresponding optical fiber described
Emitting portion.Above-mentioned optical transmission chain can only be transmitted to light, realize the steady phase of optical signal, in order to realize the steady of radiofrequency signal
Phase, the present invention can also include user's optical sender and multiple user's photoreceivers, and the user transmitter is used for radio frequency
Signal RF_IN is converted into input optical signal and is supplied to the emitting portion 111, and user's light receiving signal is used to connect corresponding
The output optical signal that receiving portions 113 provide is converted into radiofrequency signal RF_OUT_1~RF_OUT_n outputs.
The phase measurement pilot tone link 120 includes the first optical sender, point frequency pilot source, phase measurement module and first
Photoreceiver, the point frequency pilot source are used to point-frequency signal being sent respectively to first optical sender and phase measurement mould
The point-frequency signal is converted to first optical signal and is supplied to the emitting portion 111 by block, first optical sender；Institute
State the first photoreceiver and be supplied to the phase measurement mould for the first optical signal fed back to be converted into the first measurement signal
Block；The phase measurement module is used for according to the point-frequency signal and the first measurement signal, to the phase of each optical transport sublink
Potential difference measures and phase measurement is sent into the controller 140.The Time delay measurement pilot tone link 130 includes the
Two optical senders, pulse guide-frequency source, time measurement module and the second photoreceiver, the pulse guide-frequency source are used for pulse signal
Second optical sender and time measurement module are respectively supplied to, the second optical sender is used to be converted to the pulse signal
Second optical signal is supplied to emitting portion 111；Second photoreceiver is used to the second optical signal fed back to being converted to the
Two measurement signals are supplied to time measurement module；The time measurement module is used to be believed according to the pulse signal and the second measurement
Number, the time difference of each optical transport sublink is measured and time measurement result is sent to the controller 140.
Wherein, when carrying out each channel time difference measurements, with reference to shown in Fig. 3, Time delay measurement module is turned using time figure
(TDC) technology is changed, time measurement module is using pulse signal as local reference signal, and the local reference signal and second are surveyed
The rising edge or trailing edge for measuring signal are contrasted, and obtain the time difference on the edge of two signals and output represents the numeral of the time difference
Measure D.Time delay measurement module measurement range is big, and measurement accuracy is not relatively high, for the delay of each passage of bigness scale, determines each passage
Phase difference is either with or without across the cycle.When carrying out each channel phases difference measurements, with reference to shown in Fig. 4, phase measurement module is by point
Local reference signal and the phase of the second measurement signal are contrasted as local reference signal, obtain two signals by frequency signal
Phase difference, and export and represent the voltage V of the phase difference.Phase measurement module measurement range is small (in a cycle), measurement essence
Degree is high, for carefully surveying the phase jitter of each passage.Because the measurement optical signal of two pilot tone link input inputs can pass through length
Apart from optical fiber twice, that is to say, that the phase changing capacity and Time delay variation of pilot tone link are user link phase changing capacities and prolonged
When twice of variable quantity, so phase or delay by measuring pilot tone link, it is possible to the phase of measurement user link indirectly
Or delay.That is, the phase difference of the transmitting terminal of heretofore described phase measurement pilot tone link and the first optical signal of receiving terminal is
Twice of corresponding optical transport sublink phase difference；The transmitting terminal of the Time delay measurement pilot tone link and the second optical signal of receiving terminal
Time difference be twice of the corresponding optical transport sublink time difference.
In addition, the gating component 150 includes array of photoswitch and the second Wave decomposing multiplexer, the array of photoswitch with
The emitting portion 111 connects, and the controller 140 is used for the break-make for controlling the array of photoswitch, so that each acceptance division
113 the first optical signals fed back to and the second optical signal is divided to be transmitted successively to second Wave Decomposition from the emitting portion 111
First optical signal and the second optical signal are correspondingly transferred to the phase measurement by multiplexer, second Wave decomposing multiplexer
The receiving terminal of pilot tone link 120 and Time delay measurement pilot tone link 130.Controller control 1*n photoswitches switch to from 1 passage in turn
N-channel, gate in turn per road optical signal, phase, the delay of each passage are measured by phase measurement module and Time delay measurement module
Amount of jitter.Controller is after the phase of each passage, delay jitter amount result is got, the delay inequality of passage more each first, leads to
Cross appropriate automatic control algorithm control phase compensation block coarse adjustment so that the phase difference of each passage is not across the cycle.Then compare
The phase jitter of each passage, phase compensation block fine tuning is controlled by appropriate automatic control algorithm so that the phase of each passage
Differential is bordering on 0, and phase stabilization.Phase compensation block uses adjustable optical delay line, realizes high-precision true delay adjustment, has
Effect completes phase compensation function.The present invention by the way of photoswitch switching-over light path, allow return each passage optical signal in turn
Into photoreceiver, the measurement of go forward side by side line delay and phase.If, it is necessary to n ripple by the way of each passage measures simultaneously
Decomposition multiplex device, n photoreceiver 0, n photoreceiver 1, n phase measurement module, n Time delay measurement module, it is also necessary to will
Point frequency pilot source LF1_REF and pulse guide-frequency source LF0_REF is divided into n roads, can so greatly increase the complexity of device.Using wheel
These modules of the method for flow measurement and device all only need 1, only increase a 1*n optical branching device, save volume and cost, n
For the integer more than 1.
As seen from the above-described embodiment, the present invention proposes a kind of new based on pilot tone system and the double e measurement technologies of phase delay
Active Compensation method realize steady phase problem of the multi-channel wide with microwave optical transmission chain.Using the method for pilot tone, solves width
The phase measurement problem of band signal, while using the double e measurement technologies of phase delay, it is consistent with the cycle to solve multichannel phase
Sex chromosome mosaicism.
Those skilled in the art will readily occur to the present invention its after considering specification and putting into practice invention disclosed herein
Its embodiment.The application be intended to the present invention any modification, purposes or adaptations, these modifications, purposes or
Person's adaptations follow the general principle of the present invention and including undocumented common knowledges in the art of the invention
Or conventional techniques.Description and embodiments are considered only as exemplary, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be appreciated that the invention is not limited in the precision architecture for being described above and being shown in the drawings, and
And various modifications and changes can be being carried out without departing from the scope.The scope of the present invention is only limited by appended claim.
Claims (10)
1. a kind of multi-channel wide band microwave optical transmission chain transmitting terminal phase stabilizing device, it is characterised in that including optical transmission chain, phase
Position measurement pilot tone link, Time delay measurement pilot tone link and controller, the optical transmission chain include emitting portion and led to respectively
Multiple receiving portions that optical fiber is connected with the emitting portion are crossed, the emitting portion passes through corresponding optical fiber and corresponding receiving portion
An optical transport sublink is formed, the transmitting terminal of phase measurement pilot tone link and Time delay measurement the pilot tone link is corresponding by first
Optical signal and the second optical signal are supplied to the emitting portion, and the emitting portion is by the first optical signal and the second optical signal, even
A branch of optical signal is multiplexed into its input optical signal, and the beam optical signal is divided into multichannel spectroscopic signal, each road spectroscopic signal leads to
Corresponding optical fiber is crossed to transmit to corresponding receiving portion, for each receiving portion, its using the input optical signal in spectroscopic signal as
Output light signal output, the first optical signal and the second optical signal are fed back into the emitting portion, the hair by corresponding optical fiber
Penetrate part and correspondingly transmit first optical signal and the second optical signal to the phase measurement pilot tone link and Time delay measurement and lead
The receiving terminal of frequency link；
The phase measurement pilot tone link is used for the first optical signal according to its transmitting terminal and receiving terminal, to each optical transport subchain
The phase difference on road measures and phase measurement is sent into the controller, and the Time delay measurement pilot tone link is used for root
According to its transmitting terminal and the second optical signal of receiving terminal, the time difference of each optical transport sublink is measured and by time measurement
As a result it is sent to the controller；The controller is used for according to the time measurement result to light in the optical transport sublink
The phase of signal carries out coarse adjustment, the phase of optical signal in the optical transport sublink is carried out according to the phase measurement thin
Adjust.
2. multi-channel wide band microwave optical transmission chain transmitting terminal phase stabilizing device according to claim 1, it is characterised in that also
Including gating component, the controller is used to control the break-make of the gating component so that each receiving portion feed back to the
One optical signal transmits to the phase measurement pilot tone link successively from the emitting portion, each receiving portion feed back to second
Optical signal transmits to the Time delay measurement pilot tone link successively from the emitting portion.
3. multi-channel wide band microwave optical transmission chain transmitting terminal phase stabilizing device according to claim 1, it is characterised in that institute
Stating emitting portion includes the first wavelength division multiplexer, optical branching device, multiple optical circulators and multiple phase compensation blocks, and described first
The corresponding input of wavelength division multiplexer is respectively used to reception input optical signal, the first optical signal and the second optical signal, output end and led to
The first end that the optical branching device connects each optical circulator respectively is crossed, for each optical circulator, the connection of its second end is corresponding
Phase compensation block, corresponding phase compensating module connect corresponding receiving portion, the 3rd end pair of the optical circulator by optical fiber
The receiving terminal of phase measurement pilot tone link and Time delay measurement the pilot tone link should be connected；
First wavelength division multiplexer is multiplexed into a branch of optical signal being inputted optical signal, the first optical signal and the second optical signal
Afterwards, the beam optical signal transmission is given to the optical branching device, the beam optical signal is divided into multichannel spectroscopic signal, pin by the optical branching device
To every road spectroscopic signal, it is delivered to the first end of corresponding optical circulator, then from the second end output of corresponding optical circulator
Corresponding phase compensating module is given, the phase compensation block is transmitted to corresponding after phase compensation is carried out to it along corresponding optical fiber
Receiving portion；
For each receiving portion, it believes the first light using the input optical signal in spectroscopic signal as output light signal output
Number and the second optical signal the phase compensation block is fed back to by optical fiber and carries out phase compensation, hereafter first optical signal and
Second optical signal is transferred to the second end of corresponding optical circulator, is transmitted from the three-polar output for corresponding to optical circulator and correspondingly
To the phase measurement pilot tone link and the receiving terminal of Time delay measurement pilot tone link.
4. multi-channel wide band microwave optical transmission chain transmitting terminal phase stabilizing device according to claim 1, it is characterised in that pin
To each receiving portion, it includes reflection bandstop filter, and the reflection bandstop filter is used to believe the input light in spectroscopic signal
Number output light signal output is used as, the first optical signal and the second optical signal are fed back into the emitting portion by corresponding optical fiber.
5. multi-channel wide band microwave optical transmission chain transmitting terminal phase stabilizing device according to claim 1, it is characterised in that also
Including user's optical sender and multiple user's photoreceivers, the user transmitter is used to radiofrequency signal being converted into input light
Signal is supplied to the emitting portion, and user's light receiving signal is used to turn the output optical signal that corresponding receiving portion provides
Change radiofrequency signal output into.
6. multi-channel wide band microwave optical transmission chain transmitting terminal phase stabilizing device according to claim 1, it is characterised in that institute
Stating phase measurement pilot tone link includes the first optical sender, point frequency pilot source, phase measurement module and the first photoreceiver, described
Point frequency pilot source is used to point-frequency signal being sent respectively to first optical sender and phase measurement module, the first light hair
Penetrate machine the point-frequency signal is converted into first optical signal and be supplied to the emitting portion；First photoreceiver is used for
The first optical signal fed back to is converted into the first measurement signal and is supplied to the phase measurement module；The phase measurement module
For according to the point-frequency signal and the first measurement signal, being measured to the phase difference of each optical transport sublink and by phase
Measurement result is sent to the controller.
7. multi-channel wide band microwave optical transmission chain transmitting terminal phase stabilizing device according to claim 1, it is characterised in that institute
Stating Time delay measurement pilot tone link includes the second optical sender, pulse guide-frequency source, time measurement module and the second photoreceiver, described
Pulse guide-frequency source is used to pulse signal being respectively supplied to second optical sender and time measurement module, the second light hair
Penetrate machine and be supplied to the emitting portion for the pulse signal to be converted into the second optical signal；Second photoreceiver is used for
The second optical signal fed back to is converted into the second measurement signal and is supplied to time measurement module；The time measurement module is used for
According to the pulse signal and the second measurement signal, the time difference of each optical transport sublink is measured and by time measurement
As a result it is sent to the controller.
8. multi-channel wide band microwave optical transmission chain transmitting terminal phase stabilizing device according to claim 2, it is characterised in that institute
Stating gating component includes array of photoswitch and the second Wave decomposing multiplexer, and the array of photoswitch is connected with the emitting portion,
The controller is used to control the break-make of the array of photoswitch, so that the first optical signal that each receiving portion is fed back to and the
Two optical signals transmit to second Wave decomposing multiplexer successively from the emitting portion, and second Wave decomposing multiplexer is by institute
State the first optical signal and the second optical signal is correspondingly transferred to connecing for the phase measurement pilot tone link and Time delay measurement pilot tone link
Receiving end.
9. multi-channel wide band microwave optical transmission chain transmitting terminal phase stabilizing device according to claim 1, it is characterised in that institute
The transmitting terminal of phase measurement pilot tone link and the first optical signal phase difference of receiving terminal are stated to be inputted in corresponding optical transport sublink
Twice of output light signal phase difference；The time of the transmitting terminal of the Time delay measurement pilot tone link and the second optical signal of receiving terminal
Difference is twice of the time difference of input and output optical signal in corresponding optical transport sublink.
10. multi-channel wide band microwave optical transmission chain transmitting terminal phase stabilizing device according to claim 1, it is characterised in that
Time difference measurements are that the time difference on the edge of two signals is measured, and phase difference measurement is that the phase difference of two signals is surveyed
Amount.
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