CN109286440A - A kind of laser power supply based on doubly clad optical fiber and total road information back system - Google Patents
A kind of laser power supply based on doubly clad optical fiber and total road information back system Download PDFInfo
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- CN109286440A CN109286440A CN201811181729.8A CN201811181729A CN109286440A CN 109286440 A CN109286440 A CN 109286440A CN 201811181729 A CN201811181729 A CN 201811181729A CN 109286440 A CN109286440 A CN 109286440A
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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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Abstract
A kind of laser power supply based on doubly clad optical fiber and total road information back system, including laser transmitting-receiving module, optical fiber transmission module and sensor monitoring module, optical fiber transmission module include doubly clad optical fiber；The present invention uses doubly clad optical fiber as laser power supply and information back access, respectively the transmitting two paths light in fibre core and covering, thus can in an optical fiber transmitting two paths light beam.Laser work is in 1060~1600nm wave band, laser function and signal transmission can be completed at the same time, without the optical path from new setting communication band, and device is mature, it reduces costs, the present invention has merged the relevant technologies progress of optical fiber and fields of light devices, solves the energy supply demand of equipment monitoring sensor under Automation of Electric Systems and smart grid application environment.
Description
Technical field
The present invention relates to optical fiber transmission fields, specifically, being related to a kind of laser power supply based on doubly clad optical fiber and total road
Information back system.
Background technique
With the development of Automation of Electric Systems and smart grid, it is increasingly heavy that centering high-tension electricity equipment carries out real-time monitoring
It wants, intelligent electronic device and the sensor of monitoring using increasingly extensive in power transmission and transforming equipment.For accurate measurements electrical equipment
A variety of physical quantitys, a large amount of, a plurality of types of sensor nodes are by dense distribution in region to be measured.Mesohigh electrical equipment
Monitoring sensor is mainly made of electronic circuit, using low-voltage DC supply.However, becoming in such as high-tension overhead line, electric power
Under the application environments such as depressor, middle-high voltage switch, it is contemplated that installation site and insulating requirements, power supply generally cannot by conducting wire from
Low-pressure side is directly fed, and electrical equipment primary side voltage class is high, can not be directly from primary electricity side-draw.Conventionally by artificial supplementation
The method of sensor node energy is no longer applicable in, cost be also it is very huge, cause power supply to become and restrict online prison
The problem broken through is badly in need of in examining system development.
At present for the energy supply demand of equipment monitoring sensor under Automation of Electric Systems and smart grid application environment, gush
Reveal plurality of energy supplies technology, including natural environment takes energy, electromagnetic field to take energy, non-contact laser energy supply etc., due to equipment monitoring
Number of sensors numerous types, in complicated geographical location circumstances, the safe insulation characteristic of electrical equipment, needs to take in addition
Energy scheme takes into account a variety of requirements such as power supply reliability, power supply quality, output power.Natural environment takes energy method, such as solar energy
And wind energy, larger by seasonal effect, strong winter in solar energy summer is weak, and wind energy is then that weak winter in summer is strong on the contrary；At one day 24
In hour, solar energy can only utilize on daytime, and wind energy is then to be better than daytime at night.Due to the uncontrollability of natural environment, no
Stable electric energy supply can be provided for monitoring device.Electromagnetic field take can method, such as current transformer take can, work by
The influence of power network current.Usual line current dynamic range is very big, when primary current lower (pacifying down to number), cannot obtain foot
Enough energy, cause to take can equipment there are " take can dead angle "；When primary current increase to it is thousands of peace it is above when, take can mutual inductor produce
Interference and damage caused by the raw high pressure inspection each device in pulse pair pair side, it is especially larger to the interference of power supply and subsequent conditioning circuit.
Laser power supply method preferably balances above the characteristics of taking energy method, can shield natural environment and power grid
The influence of electric current provides stable electric energy supply for monitoring device.But how in the type selecting of energy-transmission optic fibre, altogether road information
Transmission and reduce high potential sensor monitoring power consumption and reduce laser power supply system overall cost in terms of improve into
The technical issues of for prior art urgent need to resolve.
Summary of the invention
It is an object of the invention to propose a kind of laser power supply based on doubly clad optical fiber and total road information back system, solution
The energy supply demand of equipment monitoring sensor under Automation of Electric Systems of having determined and smart grid application environment, and simplify system structure
Frame reduces overall cost.
To achieve this purpose, the present invention adopts the following technical scheme:
A kind of laser power supply based on doubly clad optical fiber and total road information back system, it is characterised in that:
Including laser transmitting-receiving module, optical fiber transmission module and sensor monitoring module, the optical fiber transmission module includes double-contracting
Layer optical fiber；
Wherein the laser transmitting-receiving module includes the first optical path beam splitter, photodetector and heat transfer agent memory,
The energy light that the emitting laser is launched is coupled to the double clad light in optical fiber transmission module via the first optical path beam splitter
Covering in fibre perhaps in fibre core all the way toward in addition being connect all the way in covering in opposite end transmitting doubly clad optical fiber or fibre core
For the signal modulation light of receipts via the first optical path beamsplitter to photodetector, photodetector obtains electric signal storage sensing
Information-storing device；
In covering or fibre core in the doubly clad optical fiber all the way toward sensor monitoring module emitted energy light, double clad
The signal modulation light for receiving sensor monitoring module transfer to laser transmitting-receiving module all the way in covering or fibre core in optical fiber；
The sensor monitoring module includes coupling splitter, photovoltaic cell, equipment monitoring sensor and electrooptic modulator,
Wherein the second optical path beam splitter receives the energy light all the way in the covering or fibre core in doubly clad optical fiber, and via coupling
It closes optical splitter and the energy beam is divided into two-way, major part is sent to photovoltaic cell and is powered, and fewer parts is sent to light
Electric modulator is powered equipment monitoring sensor as signal modulation light, the photovoltaic cell, the equipment monitoring sensing
Device exports transducing signal, is transmitted to electrooptic modulator and is modulated to the signal modulation light, the modulated signal modulation
Light is coupled to the covering in doubly clad optical fiber or the another way in fibre core via the second optical path beam splitter, is back to laser
Transceiver module.
Optionally, the energy light transmits in covering, and the signal modulation light transmits in fibre core.
Optionally, the work of the laser, the doubly clad optical fiber, the photodetector and the electrooptic modulator
Wavelength is between 1060~1600nm wave band.
Optionally, the operation wavelength of the laser is less than 3nm, output power between 1060~1600nm, spectral line width
Not less than 5W, working method is continuous wave mode.
Optionally, the photo detector spectral response range is less than between 1060~1600nm, photosensitive response time
0.1ms, corresponding responsive bandwidth are greater than 10KHz.
Optionally, the doubly clad optical fiber operation wavelength is between 1060~1600nm, fibre core numerical aperture between 0.08~
0.12, covering numerical aperture is not less than 0.46, and fibre core is lost@1300nm and is not more than 40dB/km, and cladding loss@1095nm is little
In 15dB/km, sandwich layer diameter is between 10~20um, and cladding diameter is between 130~400um.
Optionally, for the photovoltaic cell operation wavelength between 1060~1600nm, quantum efficiency within this range is not low
The power not less than 1W can be exported after 20%, optical electrical conversion, and the photovoltaic cell includes DC boosting function, being used for will
Cascaded-output voltage rises to 3.3V.
Optionally, the electrooptic modulator is adjustable optical attenuator, and operation wavelength is between 1060~1600nm, operating voltage
Greater than 3.3V, attenuation range is less than 0.1ms between 0~25dB, response speed, and the transmission rate of modulated information is not less than
10Kbits/s。
Optionally, at least 95% light is sent to photovoltaic cell and is powered by the coupling splitter, preferably will be defeated
Enter light wave to export according to 99:1 points to two-way.
Optionally, the first optical path beam splitter and the second optical path beam splitter are by the way of fused biconical taper fiber optic bundle
It is made.
Compared with the existing technology, the present invention has the advantage that:
1. covering and optical fiber that double-clad laser is utilized realize total road transmission as two transmission channels；
2. related component work can be completed at the same time laser function and signal transmission, nothing in 1060~1600nm wave band
Need to be from the optical path of new setting communication band, and device is mature, reduces costs；
3. realizing the one-way transmission from hot side to low potential side, the realization of high potential sensor monitoring power consumption, letter are reduced
The speed of 10Kbits/s or so may be implemented in breath transmission rate, meets under Automation of Electric Systems and smart grid application environment
Equipment monitoring sensor information return queue, compared with the prior art in bi-directional transmission of information and up to 54Mbits/s biography
Defeated rate, hence it is evident that reduce power consumption.
Detailed description of the invention
Fig. 1 is the laser power supply based on doubly clad optical fiber of specific embodiment and altogether road information back system according to the present invention
Integral module figure；
Fig. 2 is the schematic diagram of the laser transmitting-receiving module of specific embodiment according to the present invention；
Fig. 3 is the schematic diagram of the sensing detection module of specific embodiment according to the present invention.
The technical characteristic in appended drawing reference the respectively referred to generation in figure are as follows:
101, laser transmitting-receiving module；102, optical fiber transmission module；103, sensing detection module；201, emitting laser；
202, the first optical path beam splitter；203, photodetector；204, heat transfer agent memory；301, the second optical path beam splitter；302,
Coupling splitter；303, photovoltaic cell；304, equipment monitoring sensor；305, electrooptic modulator.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
The invention reside in: use doubly clad optical fiber as laser power supply and information back access, respectively in fibre core and covering
Middle transmitting two paths light optionally transmits laser function in covering, transmits the signal light of return in fibre core, therefore can be
Transmitting two paths light beam in a piece optical fiber.Laser work is in 1060~1600nm wave band, although power is not high enough, covers sensing
With communicate common wave band, and relevant light paths element manufacturing is mature, can better control system cost, convenient for the big rule of system
Mould, low cost manufacturing, especially suitable under Automation of Electric Systems and smart grid application environment equipment monitoring sensor believe
It is only necessary to single channel information backs in breath passback, for the not high occasion of power consumption requirements.
The laser power supply based on doubly clad optical fiber is shown referring to Fig. 1 to Fig. 3, Fig. 1 and is total to the whole of road information back system
Module figure, Fig. 2 and Fig. 3 respectively illustrate the schematic diagram of laser transmitting-receiving module and sensor monitoring module therein.
A kind of laser power supply and road information back system, including laser transmitting-receiving module 101 altogether based on doubly clad optical fiber, light
Fine transmission module 102 and sensor monitoring module 103, the optical fiber transmission module 102 include doubly clad optical fiber；
Wherein the laser transmitting-receiving module 101 includes the first optical path beam splitter 202, photodetector 203 and sensing letter
Memory 204 is ceased, the laser that the emitting laser 201 is launched, i.e. energy light are coupled to via the first optical path beam splitter 202
Emitting all the way toward opposite end in the covering or fibre core in doubly clad optical fiber in optical fiber transmission module 102, in doubly clad optical fiber
The received light of other institute all the way in covering or fibre core is transmitted to photodetector 203 via the first optical path beam splitter 202, light
Electric explorer 203 obtains electric signal storage heat transfer agent memory 204；
In covering or fibre core in the doubly clad optical fiber all the way toward 103 emitted energy light of sensor monitoring module, it is double
The letter for receiving sensor monitoring module 103 all the way and being transmitted to laser transmitting-receiving module 101 in covering or fibre core in cladded-fiber
Number light；
The sensor monitoring module 103 includes, coupling splitter 302, photovoltaic cell 303, equipment monitoring sensor 304,
With electrooptic modulator 305, wherein the second optical path beam splitter 301 receive doubly clad optical fiber in covering or fibre core in one
The energy light on road, and the energy beam is divided into two-way via coupling splitter 302, major part is sent to photovoltaic cell 303
It is powered, fewer parts is sent to electrooptic modulator 305 and is used as signal modulation light, and the photovoltaic cell 303 is to equipment monitoring
Sensor 304 is powered, and the equipment monitoring sensor 304 exports transducing signal, is transmitted to electrooptic modulator 305 to described
Signal modulation light is modulated, and the modulated signal modulation light is coupled to double-contracting via the second optical path beam splitter 301
The another way in covering or fibre core in layer optical fiber, is back to laser transmitting-receiving module 101.
Therefore, two in the present invention using the covering of doubly clad optical fiber and fibre core as energy light and signal optical transport are led to
The total road transmission of laser function and information back has been accomplished on road.
Optionally, the energy light transmits in covering, and the signal modulation light transmits in fibre core.
Wherein, the operation wavelength of the laser, doubly clad optical fiber, photodetector, electrooptic modulator between 1060~
1600nm wave band.
Therefore, compared to using other wavelength, such as the wavelength of 810~830nm, the system of relevant light paths device of the present invention
Make technical maturity, can better control system cost, and mainly used in laser communication be exactly 1550nm wavelength,
Relevant communication device is also work in this wavelength.Therefore, the present invention laser different without two-way, it is thus only necessary to
1060~1600nm wave band just can be achieved at the same time laser power supply and information back.
Although the present invention realizes the " single of sensor monitoring information in addition, 1060~1600nm wave band of laser power is slightly lower
To " passback, especially meet equipment monitoring sensor information return queue under Automation of Electric Systems and smart grid application environment
, it is not necessarily to high power and high speed, transmission speed, such as can be 10Kbits/s, further reduced the requirement to power consumption.
Further, the operation wavelength of laser 201 is less than 3nm, output power between 1060~1600nm, spectral line width
Not less than 5W, working method is continuous wave mode.
Further, 203 spectral response range of photodetector in laser transmitting-receiving module 101 is between 1060~1600nm,
The photosensitive response time is less than 0.1ms, and corresponding responsive bandwidth is greater than 10KHz.
Further, doubly clad optical fiber operation wavelength is between 1060~1600nm, fibre core numerical aperture between 0.08~0.12,
Covering numerical aperture is not less than 0.46, and fibre core is lost@1300nm and is not more than 40dB/km, and cladding loss@1095nm is not more than
15dB/km, sandwich layer diameter is between 10~20um, and cladding diameter is between 130~400um.
Further, 303 operation wavelength of photovoltaic cell in sensor monitoring module 103 is between 1060~1600nm, in this model
Quantum efficiency in enclosing can export the power not less than 1W not less than 20% after optical electrical conversion, and this module includes DC boosting
Function, for cascaded-output voltage to be risen to 3.3V.
Further, the electrooptic modulator 305 in sensor monitoring module 103 can be adjustable optical attenuator 305, working machine
Reason is based on tunable diffraction gratings, and for operation wavelength between 1060~1600nm, operating voltage is greater than 3.3V, attenuation range between 0~
25dB, response speed are less than 0.1ms, and the transmission rate of modulated information is not less than 10Kbits/s.
At least 95% light is sent to photovoltaic cell 303 and is powered by the coupling splitter, optional real at one
It applies in example, input light wave is exported according to 1:99 points to two-way.
In the present invention, the first optical path beam splitter and the second optical path beam splitter can be using fused biconical taper light in the prior art
The optical fibre device prepared on the basis of fine beam (Taper Fused Fiber Bundle, TFB).It is that a branch of optical fiber is peelled off painting
Then coating is arranged together in a certain way, heating is allowed to melt in high temperature, while stretching optical fiber beam round about,
Optical fiber heating region is melted into melting cone fiber beam (for example, can refer toHttps: //baike.baidu.com/item/% E5%85%89%E7%BA%A4%E5%90%88%E6%9D%9F%E5%99%A8/19555601。)。
As can be seen that a kind of above-mentioned laser power supply based on doubly clad optical fiber of the invention and total road from foregoing description
Information back system, working principle are specific as follows: the high-power laser 201 in the laser transmitting-receiving module 101 of low potential
Continuous light wave is exported, by optical path wave multiplexer 202, the covering of doubly clad optical fiber in optical fiber transmission module 102 is coupled into, is wrapping
Hot side is transmitted to by low potential side in layer.Optical path channel-splitting filter 301 in high potential sensor monitoring module 103, by double clad
Light wave in fibre cladding extracts, and is transmitted to coupling splitter 302.Coupling splitter 302 will input light wave according to 1:99 points
It is exported to two-way, the more branch of luminous energy is coupled into photovoltaic cell 303；The less branch of luminous energy is coupled into variable optical attenuation
Device 305.Photovoltaic cell 303 completes the conversion of luminous energy to electric energy, and carries out DC boosting, powers to equipment monitoring sensor 304,
Thus in completion system laser power supply function.The electric signal that equipment monitoring sensor 304 exports, is transmitted to adjustable optical attenuator
305, complete the adjustable damping to light wave, such as amplitude modulation.Light modulating signal enters double-contracting by optical path channel-splitting filter coupling 301
The fibre core of layer optical fiber, is transmitted to low potential side by hot side in fibre core.By the light in low potential laser transmitting-receiving module 101
Road wave multiplexer 202, light modulating signal are coupled into photodetector 203, thus complete the function of the road system Zhong Gong information back.
The present invention has merged the relevant technologies progress of optical fiber and fields of light devices, solves Automation of Electric Systems and intelligence
The energy supply demand of equipment monitoring sensor under power grid application environment can export the power not less than 1W after conversion；And meeting
Under the premise of low-power consumption, the information back of hot side sensor, the rate of information throughput are realized in such a way that optical fiber is total to road
Not less than 10Kbits/s.
Compared with the existing technology, the present invention has the advantage that:
1. covering and optical fiber that double-clad laser is utilized realize total road transmission as two transmission channels；
2. related component work can be completed at the same time laser function and signal transmission, nothing in 1060~1600nm wave band
Need to be from the optical path of new setting communication band, and device is mature, reduces costs；
3. realizing the one-way transmission from hot side to low potential side, the realization of high potential sensor monitoring power consumption, letter are reduced
The speed of 10Kbits/s or so may be implemented in breath transmission rate, meets under Automation of Electric Systems and smart grid application environment
Equipment monitoring sensor information return queue, compared with the prior art in bi-directional transmission of information and up to 54Mbits/s biography
Defeated rate, hence it is evident that reduce power consumption.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
A specific embodiment of the invention is only limitted to this, for those of ordinary skill in the art to which the present invention belongs, is not taking off
Under the premise of from present inventive concept, several simple deduction or replace can also be made, all shall be regarded as belonging to the present invention by institute
Claims of submission determine protection scope.
Claims (10)
1. a kind of laser power supply based on doubly clad optical fiber and total road information back system, it is characterised in that:
Including laser transmitting-receiving module, optical fiber transmission module and sensor monitoring module, the optical fiber transmission module include double clad light
It is fine；
Wherein the laser transmitting-receiving module includes the first optical path beam splitter, photodetector and heat transfer agent memory, described
The energy light that emitting laser is launched is coupled in the doubly clad optical fiber in optical fiber transmission module via the first optical path beam splitter
Covering perhaps in fibre core all the way toward in covering in opposite end transmitting doubly clad optical fiber or fibre core in addition institute is received all the way
For signal modulation light via the first optical path beamsplitter to photodetector, photodetector obtains electric signal storage heat transfer agent
Memory；
In covering or fibre core in the doubly clad optical fiber all the way toward sensor monitoring module emitted energy light, doubly clad optical fiber
In covering or fibre core in all the way receive sensor monitoring module transfer to laser transmitting-receiving module signal modulation light；
The sensor monitoring module includes coupling splitter, photovoltaic cell, equipment monitoring sensor and electrooptic modulator, wherein
The second optical path beam splitter receives the energy light all the way in covering or fibre core in doubly clad optical fiber, and via coupling point
The energy beam is divided into two-way by light device, and major part is sent to photovoltaic cell and is powered, and fewer parts is sent to photoelectricity tune
Device processed is powered equipment monitoring sensor as signal modulation light, the photovoltaic cell, and the equipment monitoring sensor is defeated
Transducing signal out is transmitted to electrooptic modulator and is modulated to the signal modulation light, the modulated signal modulation light warp
Covering in doubly clad optical fiber or the another way in fibre core are coupled to by the second optical path beam splitter, are back to laser transmitting-receiving
Module.
2. a kind of laser power supply based on doubly clad optical fiber according to claim 1 and total road information back system, special
Sign is:
The energy light transmits in covering, and the signal modulation light transmits in fibre core.
3. a kind of laser power supply based on doubly clad optical fiber according to claim 1 or 2 and total road information back system,
It is characterized in that:
The laser, the doubly clad optical fiber, the photodetector and the electrooptic modulator operation wavelength between
1060~1600nm wave band.
4. a kind of laser power supply based on doubly clad optical fiber according to claim 3 and total road information back system, special
Sign is:
For the operation wavelength of the laser between 1060~1600nm, spectral line width is less than 3nm, and output power is not less than 5W, work
Making mode is continuous wave mode.
5. a kind of laser power supply based on doubly clad optical fiber according to claim 3 and total road information back system, special
Sign is:
For the photo detector spectral response range between 1060~1600nm, the photosensitive response time is less than 0.1ms, corresponding response
Band is wider than 10KHz.
6. a kind of laser power supply based on doubly clad optical fiber according to claim 3 and total road information back system, special
Sign is:
The doubly clad optical fiber operation wavelength is between 1060~1600nm, and fibre core numerical aperture is between 0.08~0.12, covering number
It is worth aperture and is not less than 0.46, fibre core is lost@1300nm and is not more than 40dB/km, and cladding loss@1095nm is not more than 15dB/km, core
Layer diameter is between 10~20um, and cladding diameter is between 130~400um.
7. a kind of laser power supply based on doubly clad optical fiber according to claim 3 and total road information back system, special
Sign is:
The photovoltaic cell operation wavelength is between 1060~1600nm, and quantum efficiency within this range is not less than 20%, optical electrical
The power not less than 1W can be exported after conversion, and the photovoltaic cell includes DC boosting function, be used for cascaded-output voltage
Rise to 3.3V.
8. a kind of laser power supply based on doubly clad optical fiber according to claim 3 and total road information back system, special
Sign is:
The electrooptic modulator is adjustable optical attenuator, and operation wavelength is greater than 3.3V, declines between 1060~1600nm, operating voltage
Subtract range between 0~25dB, response speed is less than 0.1ms, and the transmission rate of modulated information is not less than 10Kbits/s.
9. a kind of laser power supply based on doubly clad optical fiber according to claim 3 and total road information back system, special
Sign is:
At least 95% light is sent to photovoltaic cell and is powered by the coupling splitter, preferably will input light wave according to
99:1, which divides to two-way, to be exported.
10. a kind of laser power supply based on doubly clad optical fiber according to claim 3 and total road information back system, special
Sign is:
The first optical path beam splitter and the second optical path beam splitter are made by the way of fused biconical taper fiber optic bundle.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110380332A (en) * | 2019-07-23 | 2019-10-25 | 国网电力科学研究院武汉南瑞有限责任公司 | A kind of power can monitor laser energy supply device and its monitoring method |
| CN110488428A (en) * | 2019-07-04 | 2019-11-22 | 国网江西省电力有限公司信息通信分公司 | A kind of energy transmission system based on energy-transmission optic fibre |
| CN110715791A (en) * | 2019-10-14 | 2020-01-21 | 南京工程学院 | Optical fiber type laser energy distribution network system and distribution method |
| CN111327361A (en) * | 2020-01-17 | 2020-06-23 | 中国科学院半导体研究所 | Different wavelength laser signal and energy dual-transmission system |
| CN112585891A (en) * | 2019-06-20 | 2021-03-30 | 京瓷株式会社 | Optical fiber power supply system and data communication device |
| CN113965273A (en) * | 2021-12-23 | 2022-01-21 | 国网江西省电力有限公司信息通信分公司 | Laser energy supply method and system of energy-communication common transmission optical fiber |
| CN114285493A (en) * | 2021-12-23 | 2022-04-05 | 国网江西省电力有限公司信息通信分公司 | Optical fiber information common transmission optimization system |
| WO2023049714A1 (en) * | 2021-09-21 | 2023-03-30 | Raytheon Company | Dual-polarization rotationally-insensitive monostatic transceiver with dual cladding fiber |
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