CN106656335B - A kind of device and method for realizing the frequency conversion of microwave signal photonics and multichannel optical fiber transmission - Google Patents
A kind of device and method for realizing the frequency conversion of microwave signal photonics and multichannel optical fiber transmission Download PDFInfo
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- CN106656335B CN106656335B CN201610880057.4A CN201610880057A CN106656335B CN 106656335 B CN106656335 B CN 106656335B CN 201610880057 A CN201610880057 A CN 201610880057A CN 106656335 B CN106656335 B CN 106656335B
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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
- H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
- H04B10/25752—Optical arrangements for wireless networks
- H04B10/25758—Optical arrangements for wireless networks between a central unit and a single remote unit by means of an optical fibre
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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
- H04B10/2507—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion
-
- 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
- H04B10/2587—Arrangements specific to fibre transmission using a single light source for multiple stations
-
- 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
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
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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
- H04B10/5165—Carrier suppressed; Single sideband; Double sideband or vestigial
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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
- H04B10/564—Power control
Abstract
The invention discloses a kind of device and methods that the frequency conversion of microwave signal photonics and multichannel optical fiber transmission are realized using palarization multiplexing modulator.The invention is related to microwave technology and technical field of photo communication.The invention device is as shown, include laser diode LD, palarization multiplexing horse increasing modulator PDM-MZM, erbium-doped optical fiber amplifier EDFA, the 1 point of road N optical splitter 1:N Spiltter, polarizer Pol, Polarization Controller PC, standard single-mode fiber SMF and photoelectric detector PD.The present invention is mixed after carrying out carrier-suppressed double sideband modulation to radio frequency and local oscillator LO signal using PDM-MZM, improves conversion gain and frequency variation signal to the isolation of RF and LO.In addition in the device, optical signal can be divided into multichannel, and every road carries out the optical fiber transmission of different length, and the power fading on every road can independently be compensated by Polarization Control, be independent of each other.The invention device structure is simple, and configuration method is convenient, flexible, has channel expansion, has potential using value in the radio communication of light load, antenna pulling away, multi-static radar system.
Description
Technical field
The present invention relates to microwave signal light in technical field of photo communication and microwave technical field more particularly to optical communication technique
Son learns frequency conversion and multichannel optical fiber transmission.
Background technique
Internet era information content is rapidly increasing, and the demand of media data flow is also continuously increased, and smart phone is general in addition
And so that people are also higher and higher to the requirement in terms of the bandwidth and mobility of network.In this background, light carries radio frequency
(Radio-over-Fiber, RoF) communication system have very big development prospect because it not only have the big bandwidth of fiber optic communication,
High-speed, the advantage of electromagnetism interference are also equipped with the strong feature of wireless communication access, mobility, so RoF communication is not
Carry out the developing direction of broadband wireless communications.
In RoF communication system, frequency transformation is wherein critically important part, due to the limitation of equipment, high-frequency microwave letter
It number only just can be carried out the signal processing of subsequent area of light or electrical domain in suitable frequency range by being converted to.Due to electronics
The limitation of device itself, traditional microwave frequency conversion based on electronic technology there are Bandwidth-Constrained, isolation is poor, electromagnetic interference is serious etc.
Problem.Microwave converter technique based on photonics, using the big bandwidth of photonics, low-loss, high-isolation, without the spy of electromagnetic interference
Point can significantly improve the frequency conversion performance of microwave signal.
However, the Electro-optical Modulation of radio frequency (RF) and local oscillator (LO) signal is bilateral in common photonics frequency conversion system
Band modulation, RF and the modulated photomixing signal of LO are after optical fiber transmits, due to fibre-optical dispersion, up-conversion after mixing or under
Serious power fading may occur for frequency variation signal, influence on communication quality very big.Moreover, power fading is believed by before and after frequency conversion
Number frequency, fiber lengths, optical carrier wavelength influence.
Power fading can be solved the problems, such as using single-side belt Electro-optical Modulation technology, however current single-side belt Electro-optical Modulation skill
Art, which generally requires, uses electric phase shifter or optical filter, realizes that difficulty is larger, frequency tunability is poor.
Summary of the invention
In order to solve the technical problem in the presence of background technology, the invention proposes one kind to be based on palarization multiplexing modulator
Microwave signal converter plant.The device has three big features: first is that RF and LO signal uses suppressed-carrier double side band modulation methods
Formula improves conversion gain and frequency variation signal to the isolation of RF and LO；Second is that frequency variation signal can be compensated by Polarization Control
Power fading after optical fiber transmission；Third is that the device is extended to multichannel application, the signal after making frequency conversion can pass through simultaneously
The transmission of multiple and different length of fibre, and the power fading in each channel is compensated simultaneously.
The technical solution of the invention is as follows: described device includes laser diode (LD), palarization multiplexing Mach increasing Dare
Modulator (PDM-MZM), erbium-doped fiber amplifier (EDFA), 1 point of road N optical splitter (1:N Spiltter), polarizer
(Pol), Polarization Controller (PC), standard single-mode fiber (SMF) and photoelectric detector (PD)；The output port and PDM-MZM of LD
Input terminal be connected, RF signal loading PDM-MZM upper branch Mach increase Dare modulator (X-MZM) on, LO signal loading
Increase on Dare modulator (Y-MZM) in the lower branch Mach of PDM-MZM, the output end of modulator is connected with EDFA, EDFA output
Optical signal is divided into the road N by optical splitter, successively passes through PC, Pol, SMF and PD in each branch optical signal, wherein each branch
SMF length can be different.
X-MZM, the Y-MZM and polarization multiplexer (PBC) of above-mentioned PDM-MZM by Y type optical splitter, parallel up and down are integrated.
Above-mentioned X-MZM and Y-MZM structure having the same and performance, all have independent prevention at radio-frequency port and direct current biasing end
Mouthful.
Apparatus of the present invention at work the following steps are included:
1) continuous light carrier being issued from LD and entering PDM-MZM, light carrier is divided into equal two of power by Y type splitter
Light carrier respectively enters X-MZM and Y-MZM；
2) RF signal drives X-MZM, and the direct current biasing for controlling X-MZM makes its work in smallest point, and output carries RF signal
Carrier-suppressed double sideband optical signal；
3) LO signal drives Y-MZM, and the direct current biasing for controlling Y-MZM makes its work in smallest point, and output carries LO signal
Carrier-suppressed double sideband optical signal；
4) optical signal of X-MZM and Y-MZM output exports PDM-MZM after PBC palarization multiplexing, amplifies by EDFA, so
It is divided into the road N by optical splitter afterwards；
5) every road optical signal first passes around PC, then passes through Pol, and modulation PC makes two polarised lights and Pol into Pol
Main shaft angle is 45 °, after being transmitted by SMF, detects electric signal using PD；
6) every road can according to working frequency and fiber lengths, adjust PC with change two polarised lights phase difference (θ), so that
The up-conversion or down-conversion signal power arrived is maximum, that is, compensates for power fading.
The invention proposes a kind of microwave signal photonics converter plants and method that can be used for multichannel optical fiber transmission, should
Device will carry out palarization multiplexing after RF and LO signal modulation using PDM-MZM's, using PC to two-way before carrying out optical fiber transmission
Polarised light introduces phase difference, offsets the phase shift that fibre-optical dispersion introduces optical sideband, and power fading occurs for the signal after preventing frequency conversion.
Since two sub- modulators of PDM-MZM work in smallest point, it is bilateral that RF and LO signal is all made of suppressed carrier
Band modulation technique, light carrier are inhibited, RF the and LO signal after photodetection is smaller, and the signal after frequency conversion accounts for the master of electric signal
It leads, and then improves conversion gain and frequency variation signal to the isolation of RF and LO.
In the device, optical signal can be divided into multichannel, and every road carries out the optical fiber transmission of different length, and the power fading on every road
It can independently be compensated, be independent of each other by Polarization Control.The equipment that the program uses is simple, at low cost, easy to adjust flexible, tool
There is channel expansion.
Detailed description of the invention
Fig. 1 is the schematic diagram of apparatus of the present invention；
Fig. 2 is in the experiment test to apparatus of the present invention, and modulator is worked respectively in orthogonal points and smallest point, output
Optical signal spectrum；
Fig. 3 is in the experiment test to apparatus of the present invention, and modulator is worked respectively in orthogonal points and smallest point, without
Optical fiber transmits, the electric signal frequency spectrum obtained after PD；
Fig. 4 is in the experiment test to apparatus of the present invention, and under the optical fiber transmission of different length, power fading compensation front and back is accidentally
The curve that difference vector amplitude (EVM) changes with received optical power.
Specific embodiment
Elaborate with reference to the accompanying drawing to the embodiment of the present invention: the present embodiment before being with technical solution of the present invention
It puts and is implemented, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to down
The embodiment stated:
As shown in Figure 1, in the present embodiment, it includes Y type point that device, which includes: LD, RF signal source, LO signal source, PDM-MZM(,
Road device, X-MZM, Y-MZM, PBC), EDFA, 1:4 optical splitter, PC, Pol, SMF, PD.LD is sequentially connected PDM-MZM, EDFA,
EDFA is followed by 1:4 optical splitter.1:4 optical splitter output end connects the identical optical fiber link of 4 structures, i-th (i=1,2,3,
4) a link is sequentially connected PCi, Poli and SMFi.SMFi output termination PDi, obtains frequency variation signal in PDi output end.
In this example, the specific implementation step of method is:
Step 1: LD generates the continuous light carrier of operation wavelength 1552.5nm, optical power 15dBm, is input to half-wave voltage
For the PDM-MZM of 3.5V.The simple signal of RF signal source output frequency 5GHz, for driving X-MZM.LO signal source output frequency
The simple signal of 33GHz, for driving Y-MZM.The modulated optical signal of RF and LO exports PDM- after PBC palarization multiplexing
MZM.Generally modulator is worked in orthogonal points in traditional Electro-optical Modulation, X-MZM and Y-MZM work the PDM- in orthogonal points
The optical signal spectrum of MZM output is as shown by the dash line in figure 2, it can be seen that has significant light carrier.In apparatus of the present invention by X-MZM and
Y-MZM work is in smallest point, and optical signal spectrum such as Fig. 2 of PDM-MZM output is shown in solid, it can be seen that light carrier obtains significantly
Inhibit.
Step 2: setting LO signal power is 8dBm, and RF signal power is 2dBm, and EDFA output power is 8.5dBm.PD
Responsiveness is 0.6A/W.
Step 3: transmitting without optical fiber, and the optical signal of Pol output is directly entered PD.Adjust Pol before PC make two partially
The light phase that shakes is poorθ=0, so that the 38GHz signal after PD after up-conversion is reached maximum.Fig. 3 (b) is finally obtained electric signal frequency spectrum,
It can be seen that the 38GHz signal power after up-conversion is -13.4dBm, conversion gain reaches -15.4dB.In addition, up-conversion signal pair
The isolation of LO signal is up to 31.6dB.It is equal to X-MZM and Y-MZM in order to show that the present invention inhibits the performance advantage of light carrier
The electric signal in orthogonal points that works also is tested, as shown in Fig. 3 (a).Only-the 43dB, and upper change of conversion gain at this time
Frequency signal is to the isolation of LO signal poor (- 23.7dB).Modulator is biased in most according to the present invention it can be seen from comparison
After dot, conversion gain improves 27.6dB, and frequency variation signal improves 55.3dB to LO Signal segregation degree.
Step 4: by the 16QAM signal modulation to RF signal of 100MSym/s, then device up-conversion through the invention
To 38GHz.The photomixing signal of PDM-MZM output carries out length respectively after 1:4 optical splitter and transmits for 0km(non-fiber,
BTB), the optical fiber of 4km, 25km and 50km.Every road enters PD after PC and Pol respectively, obtains the microwave vector letter of 38GHz
Number.
Step 5: successively changing the optical power for entering PD, test the EVM that every road is converted to the vector signal of 38GHz, ties
Fruit is as shown in Figure 4.For the ease of comparing, every road is tested first and is worked asθWhen=0 EVM with optical power change curve, it can be seen that
EVM curve is preferable when BTB, and after the transmission of 4km, 25km and 50km optical fiber, the 38GHz signal after up-conversion occurs more or less
Power fading, and then EVM curve is poor.Then the optical signal on every road passes through PC respectively and is controlled, optical signal in the road Shi Mei
Two polarised light phase differences reach bestθ Opt , the EVM curve on every road is significantly improved at this time, basically reach under BTB mode
Comparable performance.
To sum up, the present invention realizes the photonics frequency conversion of microwave signal using PDM-MZM, and realizes that multichannel optical fiber transmits.
By inhibiting light carrier double sideband modulation, conversion efficiency is improved, the signal after improving frequency conversion is to the isolation of RF and LO, together
When effective compensation carried out to the power fading of frequency variation signal after multichannel optical fiber transmission by Polarization Control.The invention device
Can preferably, and structure is simple, polarization state can be controlled flexibly, and then have very strong operability in practical applications.
In short, embodiments described above is only one embodiment of the present of invention, not it is only used for limiting the present invention
Protection scope, it is noted that for those skilled in the art, in present disclosure, also
Several equivalent variations and replacement, optical power, the carrier frequency of RF and LO signal, RF format modulation signal, port number, optical fiber can be made
The adjustment of the parameters such as length also should be regarded as the scope of protection of the invention.
Claims (4)
1. a kind of method of achievable microwave signal photonics frequency conversion and multichannel optical fiber transmission, laser diode LD output light carry
Wave enters electrooptic modulator, passes through polarization respectively by the optical signal point multichannel of radio frequency and local oscillator LO signal modulation, palarization multiplexing
Enter photoelectric detector PD after controller PC and polarizer Pol and standard single-mode fiber SMF and detect the signal after frequency conversion,
It is characterized in that, the electrooptic modulator is that palarization multiplexing Mach increases Dare modulator PDM-MZM, radio frequency and local oscillator LO signal point
Not Qu Dong PDM-MZM two sub- modulators, it is logical for the road N by the 1 point of road N optical splitter 1:N Spiltter points after PDM-MZM
Road transmission, every paths enter PD detection after passing through PC and Pol and SMF, frequency conversion are realized, by adjusting the bias point of modulator
To improve isolation of system degree and conversion efficiency, every paths can adjust PC according to working frequency and fiber lengths to change two
The phase difference of polarised light, compensates power fading, and the up-conversion made or down-conversion signal power are maximum.
2. microwave signal photonics frequency conversion according to claim 1 and multichannel optical fiber transmission method, which is characterized in that
Two sub- modulators of PDM-MZM modulator work in smallest point, improve converted signals to the isolation of RF and LO, improve
Conversion efficiency.
3. microwave signal photonics frequency conversion according to claim 1 and multichannel optical fiber transmission method, which is characterized in that adjust
Saving PC can be changed up-conversion or the watt level of down-conversion signal after PD.
4. microwave signal photonics frequency conversion according to claim 1 and multichannel optical fiber transmission method, which is characterized in that adjust
Optical signal after system can be divided into multiple channels by optical splitter, and SMF of each channel Jing Guo identical or different length is transmitted, solely
The vertical PC for adjusting each channel, the power of up-conversion or down-conversion signal after can making every channel PD reach maximum, avoid power
Decline.
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| CN110429986B (en) * | 2019-07-03 | 2022-03-18 | 复旦大学 | Multichannel millimeter wave generation and wireless transmission system based on single-side band modulation |
| CN110336611B (en) * | 2019-07-23 | 2021-01-29 | 中国科学院半导体研究所 | Image interference rejection mixer based on optical fiber dispersion effect |
| CN113219828B (en) * | 2021-04-22 | 2022-07-05 | 中国电子科技集团公司第二十九研究所 | Control method for gain consistency of multi-channel analog optical module |
| CN113726444B (en) * | 2021-08-30 | 2023-04-28 | 中国电子科技集团公司第四十四研究所 | Array microwave signal optical domain down-conversion method and device |
| CN114024616B (en) * | 2021-10-22 | 2023-05-02 | 北京邮电大学 | Multi-path variable frequency structure realized by polarization state independent modulation |
| CN114826391B (en) * | 2022-03-11 | 2023-05-12 | 中国电子科技集团公司第二十九研究所 | Method and device for controlling phase difference among channels of multi-channel radio frequency optical transmission product |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9287993B1 (en) * | 2014-10-31 | 2016-03-15 | The United States Of America As Represented By The Secretary Of The Navy | RF channelizer based on parametrically generated combs derived from a single master seed |
| CN105676206A (en) * | 2016-01-14 | 2016-06-15 | 中国人民解放军空军工程大学 | Linear frequency-modulated signal microwave photon frequency multiplication method and device |
| CN105763260A (en) * | 2016-01-16 | 2016-07-13 | 西安电子科技大学 | Device and method of generating triangular waves by using phase modulator and Sagnac ring |
-
2016
- 2016-09-28 CN CN201610880057.4A patent/CN106656335B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9287993B1 (en) * | 2014-10-31 | 2016-03-15 | The United States Of America As Represented By The Secretary Of The Navy | RF channelizer based on parametrically generated combs derived from a single master seed |
| CN105676206A (en) * | 2016-01-14 | 2016-06-15 | 中国人民解放军空军工程大学 | Linear frequency-modulated signal microwave photon frequency multiplication method and device |
| CN105763260A (en) * | 2016-01-16 | 2016-07-13 | 西安电子科技大学 | Device and method of generating triangular waves by using phase modulator and Sagnac ring |
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