CN107947859A - A kind of optical fiber transmission delay compensation device and system - Google Patents
A kind of optical fiber transmission delay compensation device and system Download PDFInfo
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- CN107947859A CN107947859A CN201711313504.9A CN201711313504A CN107947859A CN 107947859 A CN107947859 A CN 107947859A CN 201711313504 A CN201711313504 A CN 201711313504A CN 107947859 A CN107947859 A CN 107947859A
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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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- 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
- H04B10/25891—Transmission components
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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
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
- H04B10/524—Pulse modulation
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The invention discloses a kind of optical fiber transmission delay compensation device and system, described device to include：Temperature control optical fiber disk, fiber stretcher, the first beam splitter, first annular device, phase discriminator, wave filter, temperature control circuit, high-voltage driving circuit.First beam splitter will launch optical signal and be divided into main optical signal, monitoring optical signal；Main optical signal is by first annular device, temperature control optical fiber disk, fiber stretcher to transmission line；Phase discriminator exports phase difference signal to the optical signal, the monitoring optical signal that are returned from transmission line；Wave filter is to phase difference signal, output low frequency, high frequency phase difference signal；Temperature control circuit, high-voltage driving circuit receive low frequency, high frequency phase difference signal, control temperature control optical fiber disk, fiber stretcher respectively.A kind of fibre-optic transmission system (FOTS), comprising described device, also comprising transmitter, Transmission Fibers, receiver.The present invention, which realizes, compensates the high-precision Larger Dynamic sequential time delay of fibre-optic transmission system (FOTS).
Description
Technical field
The present invention relates to optical fiber transmission field, more particularly to a kind of optical fiber transmission delay compensation device and system.
Background technology
Optical fiber is highly prone to the influence of external environment condition, such as temperature, stress factor, under long-distance optical fiber transmission conditions,
The effect is accumulated with transmission range, causes the phase of transmission signal to produce shake, received signal quality deteriorates.Optical path compensation
Technology realizes the adjustment of signal delay, technological means mainly includes optical fiber temperature control technology, mechanical-stretching skill by varying light path
Three kinds of art, photoswitch Fiber Optic Delay Line Technology.Optical fiber temperature control technology using optical fibre refractivity, length be subject to extraneous thermal effect and
The characteristic of change, realizes that continuous light path on a large scale is adjusted, but temperature control is difficult to stablize, and accuracy of temperature control directly determines that delay is mended
Precision is repaid, it is larger to improve difficulty.Mechanical stretching method by by optical fiber carry out axial stretching control, change light path physical length,
So as to control light path, but the delay compensation dynamic range realized is small.Photoswitch delay line technique is by controlling the logical of different switches
The optical fiber of length or fiber waveguide needed for disconnected selection realize the Spline smoothing of light path, but continuously adjustable benefit can not be carried out to light path
Repay.
The content of the invention
The present invention provides a kind of optical fiber transmission delay compensation device and system, solves existing apparatus and system can not be high-precision
A wide range of the problem of continuously adjusting optical fiber transmission delay.
A kind of optical fiber transmission delay compensation device, comprising：Temperature control optical fiber disk, fiber stretcher, the first beam splitter, the first ring
Shape device, phase discriminator, wave filter, temperature control circuit, high-voltage driving circuit；First beam splitter will launch optical signal and be divided into key light letter
Number, monitoring optical signal two parts；The main optical signal inputs first annular the 1st port of device, is exported through the 2nd port, then pass through
The temperature control optical fiber disk, fiber stretcher reach transmission line；The monitoring optical signal inputs the phase discriminator；From transmission line
The optical signal of return is inputted by the fiber stretcher, temperature control optical fiber disk, by first annular the 2nd port of device, defeated through the 3rd port
Go out to phase discriminator；The phase discriminator is used to carry out phase demodulation, output difference letter to the return optical signal and the monitoring optical signal
Number；The wave filter is used to receive the phase difference signal, output high frequency phase difference signal, low frequency phase difference signal；The temperature control circuit
For receiving the low frequency phase difference signal, pulse width modulated waveform is generated, controls the temperature control optical fiber disk；The high drive
Circuit is used to receive the high frequency phase difference signal, generates analog voltage signal, controls the fiber stretcher.
Further, described device also includes：Second circulator, the second beam splitter, amplifier；Second circulator by
2nd port receives the main optical signal of transmission line output, is exported through the 3rd port, then is exported after amplifier to described second point
Beam device；The main optical signal that amplifier exports is divided into by second beam splitter to be received optical signal, returns to optical signal；The return light
Signal inputs the 1st port of the second circulator, is exported through the 2nd port to transmission line.
Further, the temperature control optical fiber disk includes：Cylinder fiber reel, the first semiconductor chilling plate, the second semiconductor system
Cold, it is first heat sink, second heat sink；Optical fiber is wound with the cylinder of the cylinder fiber reel；The first, second semiconductor system
The one side of cold is close on two bottom surfaces of the cylinder fiber reel respectively, and has good heat with the cylinder fiber reel bottom surface
Contact, another side be separately fixed at described first, second it is heat sink on.
Further, the fiber stretcher includes：First semicylinder, the second semicylinder, piezoelectric actuated heap；It is described
Piezoelectric actuated heap is fixed between the side of first, second semicylinder；On the curved surface of first, second semicylinder
It is wound with optical fiber.
Preferably, the cylinder fiber reel is copper shell, and upper bottom surface is scale copper.
Preferably, the semiconductor chilling plate is composed in series using multiple PN junctions.
Preferably, the delay compensation scope of the temperature control optical fiber disk is ten nanosecond orders, and delay compensation precision is a picosecond amount
Level.
Further, the delay compensation scope of the fiber stretcher is ten picosecond magnitudes, and delay compensation precision is femtosecond
Magnitude.
A kind of fibre-optic transmission system (FOTS), comprising the optical fiber transmission delay compensation device, also includes：Transmitter, receiver,
Transmission Fibers；The transmitter is used to export transmitting optical signal；The Transmission Fibers form transmission line, for transmitting terminal and
The optical signal of receiving terminal carries out transmitted in both directions；The main optical signal of the Transmission Fibers output is amplified a part of to described
Receiver, a part, which is formed, returns to optical signal, and transmitting terminal is returned through the Transmission Fibers.
Preferably, the Transmission Fibers are long distance transmission optical fiber.
Beneficial effect of the present invention includes：The present invention provides a kind of continuously adjustable optical fiber transmission delay of high-precision large-range and mends
Repay device, using a fiber stretcher and temperature control optical fiber disk composition tandem type time-delay compensation device, temperature control optical fiber disk by
It is larger in internal temperature amplitude of variation, the delay effect of Larger Dynamic scope can be obtained.But since temperature control is one big used
The hysteresis system of property, is difficult to obtain high-precision control, it is therefore desirable to cascade an optical fiber while high dynamic range is obtained
Stretcher compensates with to combine as the fibre delay line of high-precision small dynamic range while reaches Larger Dynamic and high accuracy
Optical-fiber time-delay compensation target.
Brief description of the drawings
Attached drawing described herein is used for providing a further understanding of the present invention, forms the part of the present invention, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is a kind of optical fiber transmission delay compensation device embodiment；
Fig. 2 is a kind of optical fiber transmission delay compensation device embodiment comprising receiving terminal；
Fig. 3 is a kind of temperature control optical fiber disk embodiment；
Fig. 4 is a kind of fiber stretcher embodiment；
Fig. 5 is a kind of fibre-optic transmission system (FOTS) embodiment.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the specific embodiment of the invention and
Technical solution of the present invention is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only the present invention one
Section Example, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing
Go out all other embodiments obtained under the premise of creative work, belong to the scope of protection of the invention.
In Contemporary Information transmission technology, optical fiber with it with the advantages that roomy, transmission loss is small, electromagnetism interference, extensively
Apply in fields such as national defence, space flight, communication, astronomical observations.Since optical fiber is highly prone to external environment condition, such as temperature, stress because
The influence of element, under long-distance optical fiber transmission conditions, which accumulates with transmission range, causes the phase of transmission signal to be produced
Raw shake, received signal quality deteriorate.Therefore, the research to fiber link phase stabilization technique is most important.
When signal transmits in optical fiber, the temperature of optical fiber and suffered stress are constantly changing, so as to produce phase noise.
Main noise source is change in optical path length caused by above-mentioned factor in signals transmission.In engineer application, fiber link one
As all differed tens to thousands of kilometers, long distance transmission more exacerbates the randomness of outer fiber environmental change, signal phase
Deterioration information can be built up with transmission range.In the isometric distance applications of such as submarine optical fiber cable, by isolating optical fiber and extraneous ring
The obvious difficulty of method in border is big, of high cost, and therefore, compensation light path is the direct effective method for improving stable signal transmission degree.
The technical solution provided below in conjunction with attached drawing, each embodiment that the present invention will be described in detail.
Fig. 1 is a kind of optical fiber transmission delay compensation device embodiment, and the embodiment of the present invention provides a kind of optical fiber transmission delay
Compensation device, comprising：Temperature control optical fiber disk 11, fiber stretcher 12, the first beam splitter 13, first annular device 14, phase discriminator 15, filter
Ripple device 16, temperature control circuit 17, high-voltage driving circuit 18.
First beam splitter will launch optical signal and be divided into main optical signal, monitoring optical signal two parts；The main optical signal
The 1st port of first annular device is inputted, is exported through the 2nd port, then transmission is reached through the temperature control optical fiber disk, fiber stretcher
Circuit；The monitoring optical signal inputs the phase discriminator；From the optical signal that transmission line returns by the fiber stretcher, temperature
Control fiber reel, inputted by first annular the 2nd port of device, exported through the 3rd port to phase discriminator；The phase discriminator is used to return to described
Heliogram and the monitoring optical signal carry out phase demodulation, export phase difference signal；The wave filter is used to receive the phase difference signal,
Export high frequency phase difference signal, low frequency phase difference signal；The temperature control circuit is used to receive the low frequency phase difference signal, and generation pulse is wide
Modulation waveform is spent, controls the temperature control optical fiber disk；The high-voltage driving circuit is used to receive the high frequency phase difference signal, generates mould
Intend voltage signal, control the fiber stretcher.
Optical fiber transmission delay compensation device provided in an embodiment of the present invention uses a fiber stretcher and a temperature control light
Fine disk forms tandem type time-delay compensation device, and temperature control optical fiber disk can obtain Larger Dynamic since internal temperature amplitude of variation is larger
The delay effect of scope.It is but difficult while high dynamic range is obtained since temperature control is the hysteresis system of one big inertia
To obtain high-precision control, it is therefore desirable to cascade fibre delay line of the fiber stretcher as high-precision small dynamic range
Come combine compensate with and meanwhile reach Larger Dynamic and high-precision optical-fiber time-delay compensation target.
Fig. 2 is a kind of optical fiber transmission delay compensation device embodiment comprising receiving terminal, light provided in an embodiment of the present invention
Fine propagation delay time compensation device includes receiving terminal, a kind of optical fiber transmission delay compensation device, comprising：Temperature control optical fiber disk 11, optical fiber
Stretcher 12, the first beam splitter 13, first annular device 14, phase discriminator 15, wave filter 16, temperature control circuit 17, high-voltage driving circuit
18th, the second circulator 19, the second beam splitter 21, amplifier 20.
First beam splitter will launch optical signal and be divided into main optical signal, monitoring optical signal two parts；The main optical signal
The 1st port of first annular device is inputted, is exported through the 2nd port, then transmission is reached through the temperature control optical fiber disk, fiber stretcher
Circuit；The monitoring optical signal inputs the phase discriminator；Second circulator is received the master of transmission line output by the 2nd port
Optical signal, exports through the 3rd port, then is exported after amplifier to second beam splitter；Second beam splitter is by amplifier
The main optical signal of output, which is divided into, to be received optical signal, returns to optical signal；The return optical signal inputs the 1st end of the second circulator
Mouthful, exported through the 2nd port to transmission line；From the optical signal that transmission line returns by the fiber stretcher, temperature control optical fiber
Disk, by first annular the 2nd port of device input, exported through the 3rd port to phase discriminator；The phase discriminator is used to believe the return light
Number and it is described monitoring optical signal carry out phase demodulation, export phase difference signal；The wave filter is used to receive the phase difference signal, and output is high
Frequency phase difference signal, low frequency phase difference signal；The temperature control circuit is used to receive the low frequency phase difference signal, generates pulse width modulation
Waveform, controls the temperature control optical fiber disk；The high-voltage driving circuit is used to receive the high frequency phase difference signal, generates analog voltage
Signal, controls the fiber stretcher.
It should be noted that the transmission line has very big decay when transmitting the main optical signal, therefore needed during reception
Amplifier is wanted to be amplified signal amplitude.
In optical fiber transmission delay compensation device provided in an embodiment of the present invention, the delay compensation dynamic range of temperature control optical fiber disk
It is larger, and compensation precision is relatively low, by cascaded optical fiber stretcher collective effect, can improve compensation precision.By being passed in optical fiber
This optical fiber transmission delay compensation device is inserted into transmission link, the delay of whole fiber transmission link can be changed and connected
Continuous, real-time, a wide range of, high-precision adjusting.
Fig. 3 is a kind of temperature control optical fiber disk embodiment, and the embodiment of the present invention provides temperature control optical fiber disk embodiment, the temperature control light
Fine disk includes：It is cylinder fiber reel, the first semiconductor chilling plate, the second semiconductor chilling plate, first heat sink, second heat sink.
Optical fiber is wound with the cylinder of the cylinder fiber reel；The one side difference of first, second semiconductor chilling plate
Be close on two bottom surfaces of the cylinder fiber reel, and with the cylinder fiber reel bottom surface have it is good thermally contact, another side point
Be not fixed on described first, second it is heat sink on.
Preferably, the cylinder fiber reel is copper shell, and upper bottom surface is scale copper.
Preferably, the semiconductor chilling plate is composed in series using multiple PN junctions.
Preferably, the delay compensation scope of the temperature control optical fiber disk is ten nanosecond orders, and delay compensation precision is a picosecond amount
Level.
The main body of cylinder fiber reel described in the embodiment of the present invention is copper shell, and bottom surface is also on cylinder
For scale copper, for Optical Fiber Winding on cylinder, two panels semiconductor chilling plate is close to two bottom surface of cylinder respectively, and by smearing heat conduction
The modes such as silicone grease are realized to be thermally contacted with the good of bottom cylindrical face.The another side of two panels semiconductor chilling plate is fixed on heat sink, heat
Pass through thermostatical circulating water in heavy.Whole fiber reel is placed in hot box, and recirculated water, optical fiber, electric wire pass through small on hot box
Hole is pierced by.
Semiconductor chilling plate is a kind of electronic component for converting electrical energy into thermal energy using semi-conducting material manufacturing, mainly
It is to be composed in series by multiple PN junctions, can be absorbed respectively using PN junction both ends with releasing heat after powered up to reach heating and refrigeration
Purpose.When changing the current direction of cooling piece with regard to that can change the direction of heat flow at cooling piece both ends so as to fulfill heating and freeze
Switching.Semiconductor chilling plate has the characteristics that small, power is high, is easily integrated, is cheap, fast response time, make its ten
Divide and be adapted to small-sized precise temperature control system.
The optical fiber total length wound on fiber reel can reach several kilometers, and the temperature-control range of semiconductor chilling plate can reach
To tens degrees Celsius, optical fiber transmission delay compensation range can reach for tens nanoseconds, and delay compensation precision reaches several picoseconds.
The delay compensation dynamic range of temperature control optical fiber disk provided in an embodiment of the present invention is larger, and compensation precision is relatively low.
Fig. 4 is a kind of fiber stretcher embodiment, and the embodiment of the present invention provides a kind of fiber stretcher, the fiber-draw
Device includes：First semicylinder, the second semicylinder, piezoelectric actuated heap.
The piezoelectric actuated heap is fixed between the side of first, second semicylinder；First, second semicircle
Optical fiber is wound with the curved surface of cylinder.
Further, the delay compensation scope of the fiber stretcher is ten picosecond magnitudes, and delay compensation precision is femtosecond
Magnitude.
A piezoelectric actuated heap is fixed between two semicylinders, then winds optical fiber.It is piezoelectric actuated to pile up applied voltage
Under the action of, its elongation can change, and maximal tensility is about several microns to tens micron dimensions, the change of its elongation
The spacing of two semicylinders can be changed, so that the propagation delay time of optical fiber changes.The Optical Fiber Winding number of turns is more, time delay
The dynamic range of compensation is bigger, can reach tens picoseconds, compensation precision reaches femtosecond magnitude.
Fig. 5 is a kind of fibre-optic transmission system (FOTS) embodiment, and the embodiment of the present invention provides a kind of fibre-optic transmission system (FOTS), comprising described
Optical fiber transmission delay compensation device, also include：Transmitter 22, receiver 23, Transmission Fibers 24.
The transmitter is used to export transmitting optical signal；First beam splitter will launch optical signal be divided into main optical signal,
Monitor optical signal two parts；The main optical signal inputs first annular the 1st port of device, is exported through the 2nd port, then through described
Temperature control optical fiber disk, fiber stretcher reach transmission line；The monitoring optical signal inputs the phase discriminator；The Transmission Fibers structure
Into transmission line, for carrying out transmitted in both directions to the optical signal of transmitting terminal and receiving terminal；Second circulator is connect by the 2nd port
The main optical signal of transmission line output is received, is exported through the 3rd port, then is exported after amplifier to second beam splitter；It is described
The main optical signal that amplifier exports is divided into by the second beam splitter to be received optical signal, returns to optical signal；The Transmission Fibers output
For the amplified part of main optical signal to the receiver, a part, which is formed, returns to optical signal, is returned through the Transmission Fibers
Return transmitting terminal；The return optical signal inputs the 1st port of the second circulator, is exported through the 2nd port to transmission line；Autobiography
The optical signal that defeated circuit returns is inputted by the fiber stretcher, temperature control optical fiber disk, by first annular the 2nd port of device, through the 3rd
Port is exported to phase discriminator；The phase discriminator is used to carry out phase demodulation, output to the return optical signal and the monitoring optical signal
Phase difference signal；The wave filter is used to receive the phase difference signal, output high frequency phase difference signal, low frequency phase difference signal；The temperature
Control circuit is used to receive the low frequency phase difference signal, generates pulse width modulated waveform, controls the temperature control optical fiber disk；The height
Pressure drive circuit is used to receive the high frequency phase difference signal, generates analog voltage signal, controls the fiber stretcher.
Preferably, the Transmission Fibers are long distance transmission optical fiber.
The embodiment of the present invention provides a kind of high-precision large-range continuously adjustable fibre-optic transmission system (FOTS), can be with Larger Dynamic and height
Precision realizes that optical-fiber time-delay compensates.
It should be noted that term " comprising ", "comprising" or its any other variant are intended to the bag of nonexcludability
Contain, so that process, method, commodity or equipment including a series of elements not only include those key elements, but also including
Other elements that are not explicitly listed, or further include as this process, method, commodity or the intrinsic key element of equipment.
In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that including the key element
Process, method, also there are other identical element in commodity or equipment.
The foregoing is merely the embodiment of the present invention, is not intended to limit the invention.For those skilled in the art
For, the invention may be variously modified and varied.All any modifications made within spirit and principles of the present invention, be equal
Replace, improve etc., it should be included within scope of the presently claimed invention.
Claims (10)
1. a kind of optical fiber transmission delay compensation device, it is characterised in that include：Temperature control optical fiber disk, fiber stretcher, the first beam splitting
Device, first annular device, phase discriminator, wave filter, temperature control circuit, high-voltage driving circuit；
First beam splitter will launch optical signal and be divided into main optical signal, monitoring optical signal two parts；
The main optical signal inputs first annular the 1st port of device, is exported through the 2nd port, then through the temperature control optical fiber disk, light
Fine stretcher reaches transmission line；
The monitoring optical signal inputs the phase discriminator；
From the optical signal that transmission line returns by the fiber stretcher, temperature control optical fiber disk, defeated by first annular the 2nd port of device
Enter, exported through the 3rd port to phase discriminator；
The phase discriminator is used to carry out phase demodulation to the return optical signal and the monitoring optical signal, exports phase difference signal；
The wave filter is used to receive the phase difference signal, output high frequency phase difference signal, low frequency phase difference signal；
The temperature control circuit is used to receive the low frequency phase difference signal, generates pulse width modulated waveform, controls the temperature control light
Fine disk；
The high-voltage driving circuit is used to receive the high frequency phase difference signal, generates analog voltage signal, controls the optical fiber to draw
Stretch device.
2. optical fiber transmission delay compensation device as claimed in claim 1, it is characterised in that described device also includes：Second ring
Shape device, the second beam splitter, amplifier；
Second circulator is received the main optical signal of transmission line output by the 2nd port, is exported through the 3rd port, then through amplification
Exported after device to second beam splitter；
The main optical signal that amplifier exports is divided into by second beam splitter to be received optical signal, returns to optical signal；
The return optical signal inputs the 1st port of the second circulator, is exported through the 2nd port to transmission line.
3. such as claim 1~2 any one of them optical fiber transmission delay compensation device, it is characterised in that the temperature control optical fiber
Disk includes：It is cylinder fiber reel, the first semiconductor chilling plate, the second semiconductor chilling plate, first heat sink, second heat sink；
Optical fiber is wound with the cylinder of the cylinder fiber reel；
The one side of first, second semiconductor chilling plate is close on two bottom surfaces of the cylinder fiber reel respectively, and with
There is a good thermo-contact in the cylinder fiber reel bottom surface, another side be separately fixed at described first, second it is heat sink on.
4. such as claim 1~2 any one of them optical fiber transmission delay compensation device, it is characterised in that the fiber-draw
Device includes：First semicylinder, the second semicylinder, piezoelectric actuated heap；
The piezoelectric actuated heap is fixed between the side of first, second semicylinder；
Optical fiber is wound with the curved surface of first, second semicylinder.
5. optical fiber transmission delay compensation device as claimed in claim 3, it is characterised in that the cylinder fiber reel is copper sky
Heart thin column, upper bottom surface are scale copper.
6. optical fiber transmission delay compensation device as claimed in claim 3, it is characterised in that the semiconductor chilling plate is using more
A PN junction is composed in series.
7. such as claim 1~6 any one of them optical fiber transmission delay compensation device, it is characterised in that the temperature control optical fiber
The delay compensation scope of disk is ten nanosecond orders, and delay compensation precision is picosecond magnitude.
8. such as claim 1~6 any one of them optical fiber transmission delay compensation device, it is characterised in that the fiber-draw
The delay compensation scope of device is ten picosecond magnitudes, and delay compensation precision is femtosecond magnitude.
9. a kind of fibre-optic transmission system (FOTS), it is characterised in that mended comprising claim 1~8 any one of them optical fiber transmission delay
Device is repaid, is also included：Transmitter, receiver, Transmission Fibers；
The transmitter is used to export transmitting optical signal；
The Transmission Fibers form transmission line, for carrying out transmitted in both directions to the optical signal of transmitting terminal and receiving terminal；
The amplified part of the main optical signal to the receiver, a part for the Transmission Fibers output forms return light
Signal, transmitting terminal is returned through the Transmission Fibers.
10. optical fiber transmission delay compensation system as claimed in claim 1, it is characterised in that the Transmission Fibers is over long distances
Transmission Fibers.
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Cited By (7)
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| CN108828764A (en) * | 2018-03-30 | 2018-11-16 | 深圳市华讯方舟太赫兹科技有限公司 | A kind of optical-fiber drawing device and optical fiber delay scanning system |
| CN109002070A (en) * | 2018-09-12 | 2018-12-14 | 清华大学深圳研究生院 | A kind of temperature controlling box of grading control, control method and femtosecond frequency comb |
| WO2019183953A1 (en) * | 2018-03-30 | 2019-10-03 | 深圳市华讯方舟太赫兹科技有限公司 | Optic fiber stretching device and optic fiber delayed scanning system |
| CN111010235A (en) * | 2019-12-19 | 2020-04-14 | 北京无线电计量测试研究所 | Transceiver and optical time-frequency transmission device |
| CN111917477A (en) * | 2020-08-12 | 2020-11-10 | 中国电子科技集团公司第四十四研究所 | Distributed optical fiber broadband phase-stable transmission system and method based on ring topology |
| CN112198590A (en) * | 2020-09-15 | 2021-01-08 | 北京无线电计量测试研究所 | Active compensation method and device based on optical fiber stretcher and electric optical delay line |
| CN114114718A (en) * | 2021-10-20 | 2022-03-01 | 中国电子科技集团公司第十三研究所 | Time delay control device of optical fiber |
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| WO2019183953A1 (en) * | 2018-03-30 | 2019-10-03 | 深圳市华讯方舟太赫兹科技有限公司 | Optic fiber stretching device and optic fiber delayed scanning system |
| CN109002070A (en) * | 2018-09-12 | 2018-12-14 | 清华大学深圳研究生院 | A kind of temperature controlling box of grading control, control method and femtosecond frequency comb |
| CN109002070B (en) * | 2018-09-12 | 2024-02-23 | 清华大学深圳研究生院 | Hierarchical control temperature control box, hierarchical control method and femtosecond frequency comb |
| CN111010235A (en) * | 2019-12-19 | 2020-04-14 | 北京无线电计量测试研究所 | Transceiver and optical time-frequency transmission device |
| CN111010235B (en) * | 2019-12-19 | 2021-07-06 | 北京无线电计量测试研究所 | Transceiver and optical time-frequency transmission device |
| CN111917477A (en) * | 2020-08-12 | 2020-11-10 | 中国电子科技集团公司第四十四研究所 | Distributed optical fiber broadband phase-stable transmission system and method based on ring topology |
| CN111917477B (en) * | 2020-08-12 | 2021-06-01 | 中国电子科技集团公司第四十四研究所 | Distributed optical fiber broadband phase-stable transmission system and method based on ring topology |
| CN112198590A (en) * | 2020-09-15 | 2021-01-08 | 北京无线电计量测试研究所 | Active compensation method and device based on optical fiber stretcher and electric optical delay line |
| CN114114718A (en) * | 2021-10-20 | 2022-03-01 | 中国电子科技集团公司第十三研究所 | Time delay control device of optical fiber |
| CN114114718B (en) * | 2021-10-20 | 2024-01-30 | 中国电子科技集团公司第十三研究所 | Time delay control device for optical fiber |
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