CN108494489A - A kind of radiofrequency signal surely mutually transmits device and method - Google Patents
A kind of radiofrequency signal surely mutually transmits device and method Download PDFInfo
- Publication number
- CN108494489A CN108494489A CN201810268054.4A CN201810268054A CN108494489A CN 108494489 A CN108494489 A CN 108494489A CN 201810268054 A CN201810268054 A CN 201810268054A CN 108494489 A CN108494489 A CN 108494489A
- Authority
- CN
- China
- Prior art keywords
- optical
- phase
- signal
- light
- radio frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000013307 optical fiber Substances 0.000 claims abstract description 34
- 238000001514 detection method Methods 0.000 claims abstract description 17
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims abstract description 13
- 230000003287 optical effect Effects 0.000 claims description 178
- 230000005540 biological transmission Effects 0.000 claims description 45
- 238000011084 recovery Methods 0.000 claims description 8
- 230000001629 suppression Effects 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims 2
- 102100029469 WD repeat and HMG-box DNA-binding protein 1 Human genes 0.000 claims 1
- 101710097421 WD repeat and HMG-box DNA-binding protein 1 Proteins 0.000 claims 1
- 238000001914 filtration Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- RDYMFSUJUZBWLH-UHFFFAOYSA-N endosulfan Chemical compound C12COS(=O)OCC2C2(Cl)C(Cl)=C(Cl)C1(Cl)C2(Cl)Cl RDYMFSUJUZBWLH-UHFFFAOYSA-N 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
- H04B10/54—Intensity modulation
- H04B10/541—Digital intensity or amplitude modulation
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
Abstract
Description
技术领域technical field
本发明涉及微波光子学技术领域，具体涉及一种射频信号稳相传输装置及方法。The invention relates to the technical field of microwave photonics, in particular to a radio frequency signal phase-stable transmission device and method.
背景技术Background technique
稳相传输技术是一种保持传输射频信号相位稳定的技术，在射电天文学、分布式合成孔径雷达、高精度标准时钟分发和粒子加速器等领域具有广泛的应用。由于光纤具有低损耗、价格低和抗电磁干扰等优点，基于微波光子链路的射频信号稳相传输技术受到广泛的关注。但是，光纤的长度会由于环境扰动(特别是温度的变化)而随机变化，因此在光纤中传输的信号经历的延时也随之抖动，导致传输后的射频信号相位不稳定。为了实现射频信号经过光纤传输到远端后相位保持稳定，实时检测和补偿由光纤长度变化引起的相位抖动显得尤为重要。Phase-stabilized transmission technology is a technology that keeps the phase of transmitted radio frequency signals stable. It has a wide range of applications in the fields of radio astronomy, distributed synthetic aperture radar, high-precision standard clock distribution, and particle accelerators. Due to the advantages of optical fiber with low loss, low price and anti-electromagnetic interference, the phase-stable transmission technology of radio frequency signals based on microwave photonic links has attracted extensive attention. However, the length of the optical fiber will change randomly due to environmental disturbances (especially temperature changes), so the delay experienced by the signal transmitted in the optical fiber will also jitter accordingly, resulting in the phase instability of the transmitted RF signal. In order to keep the phase of the RF signal stable after it is transmitted to the remote end through the optical fiber, it is particularly important to detect and compensate the phase jitter caused by the change of the optical fiber length in real time.
目前，基于光纤的射频信号稳相传输技术主要是利用往返补偿原理，即通过比较往返一次后的传输信号与参考信号的相位差，得到传输链路引入的相位抖动，最终通过相位补偿使远端输出的射频信号相位保持稳定。高精度的相位检测和相位补偿是实现基于光纤的高频率、远距离、超稳定射频信号稳相传输的关键技术。基于电子鉴相器的传统电学相位检测技术，受到电子瓶颈限制，其工作带宽窄，且对高频信号的相位检测精度低。近年来，基于微波光子技术的射频信号稳相传输，具有宽带宽和精度高的优点，但需要高频光电探测和处理系统，且仍然需要采用高频鉴相器。At present, the phase-stable transmission technology of radio frequency signals based on optical fiber mainly uses the principle of round-trip compensation, that is, by comparing the phase difference between the transmission signal and the reference signal after one round-trip, the phase jitter introduced by the transmission link is obtained, and finally the remote phase is compensated through phase compensation. The phase of the output RF signal remains stable. High-precision phase detection and phase compensation are the key technologies to realize phase-stable transmission of high-frequency, long-distance, and ultra-stable radio frequency signals based on optical fibers. The traditional electrical phase detection technology based on the electronic phase detector is limited by the electronic bottleneck, its working bandwidth is narrow, and the phase detection accuracy of high-frequency signals is low. In recent years, the phase-stable transmission of radio frequency signals based on microwave photonic technology has the advantages of wide bandwidth and high precision, but high-frequency photoelectric detection and processing systems are required, and high-frequency phase detectors are still required.
发明内容Contents of the invention
本发明的目的在于：提供一种射频信号稳相传输装置及方法，解决了目前射频信号稳相传输过程中由于采用高频鉴相器和高频探测器进行相位检测，检测精度低和工作带宽受限的技术问题。The purpose of the present invention is to provide a radio frequency signal phase-stable transmission device and method, which solves the problems of low detection accuracy and working bandwidth due to the use of high-frequency phase detectors and high-frequency detectors for phase detection in the current radio-frequency signal phase-stable transmission process. Restricted technical issues.
本发明采用的技术方案如下：The technical scheme that the present invention adopts is as follows:
一种射频信号稳相传输装置，包括本地端，所述本地端通过光纤与远端光连接，所述本地端包括光载射频信号产生模块和与所述光载射频信号产生模块光连接的相位比较与控制模块，所述相位比较与控制模块包括光分束器和与所述光分束器的输出端1光连接的相位补偿器，所述相位补偿器连接所述光纤，还包括相位比较组件，所述相位比较组件包括光耦合器，所述相位补偿器与光耦合器光连接，所述光束分束器的输出端口2连接声光移频器，所述声光移频器与光耦合器光连接，所述光耦合器的输出端分别与光带通滤波器A和光带通滤波器B光连接，所述光带通滤波器A与光电探测器A光连接，所述光带通滤波器B与所述光电探测器B光连接，所述光电探测器A和光电探测器B的输出端均与电子鉴相器电连接，所述电子鉴相器与相位补偿器电连接。A radio frequency signal phase-stable transmission device, including a local end, the local end is optically connected to the remote end through an optical fiber, the local end includes an optical radio frequency signal generation module and a phase optically connected to the optical radio frequency signal generation module A comparison and control module, the phase comparison and control module includes an optical beam splitter and a phase compensator optically connected to the output end 1 of the optical beam splitter, the phase compensator is connected to the optical fiber, and also includes a phase comparison component, the phase comparison component includes an optical coupler, the phase compensator is optically connected to the optical coupler, the output port 2 of the beam splitter is connected to an acousto-optic frequency shifter, and the acousto-optic frequency shifter is connected to an optical The coupler is optically connected, and the output end of the optical coupler is optically connected with the optical bandpass filter A and the optical bandpass filter B respectively, and the optical bandpass filter A is optically connected with the photodetector A, and the optical bandpass filter A is optically connected with the photodetector A, and the optical bandpass filter A The pass filter B is optically connected to the photodetector B, the output terminals of the photodetector A and the photodetector B are both electrically connected to an electronic phase detector, and the electronic phase detector is electrically connected to a phase compensator.
进一步的，所述光电探测器A和光电探测器B均为低频光电探测器。Further, both the photodetector A and the photodetector B are low-frequency photodetectors.
进一步的，所述光载射频信号产生模块包括光源、微波源和电光强度调制器，所述光源与电光强度调制器光连接，所述微波源电与所述电光强度调制器电连接，所述电光强度调制器与所述光分束器光连接。Further, the optical radio frequency signal generation module includes a light source, a microwave source and an electro-optic intensity modulator, the light source is optically connected to the electro-optical intensity modulator, the microwave source is electrically connected to the electro-optical intensity modulator, and the An electro-optical intensity modulator is optically connected to the optical beam splitter.
进一步的，所述远端为射频信号恢复模块，所述射频信号恢复模块包括与光纤光连接的光反射器，所述光反射器连接高频光电探测器，所述高频光电探测器输出相位稳定的射频信号。Further, the remote end is a radio frequency signal recovery module, and the radio frequency signal recovery module includes an optical reflector connected to the optical fiber, the optical reflector is connected to a high-frequency photodetector, and the high-frequency photodetector outputs a phase Stable RF signal.
进一步的，所述光反射器反射来自光纤的部分光，所述光反射器由光环形器与光分束器的组合构成或由法拉第旋转镜构成。Further, the optical reflector reflects part of the light from the optical fiber, and the optical reflector is composed of a combination of an optical circulator and an optical beam splitter or a Faraday rotating mirror.
进一步的，所述相位补偿器由可调光延时线、光线拉伸器和温控光线卷中的一个构成。Further, the phase compensator is composed of one of an adjustable light delay line, a light stretcher and a temperature-controlled light coil.
一种射频信号稳相传输方法，包括以下步骤：A radio frequency signal phase-stable transmission method, comprising the following steps:
步骤1：本地端利用载波抑制的双边带调制方法产生调制信号并分光为传输光信号和参考光信号；Step 1: The local end uses the double sideband modulation method of carrier suppression to generate a modulation signal and split it into a transmission optical signal and a reference optical signal;
步骤2：所述传输光信号经光纤传输至远端，并由远端返回至本地端，与参考光信号一并传输至相位比较组件进行相位差检测；Step 2: The transmitted optical signal is transmitted to the remote end through the optical fiber, and returned to the local end from the remote end, and transmitted to the phase comparison component together with the reference optical signal for phase difference detection;
步骤3：本地端利用相位差检测的输出信号，控制相位补偿器进行相位补偿，使远端输出的射频信号相位保持稳定。Step 3: The local end uses the output signal of the phase difference detection to control the phase compensator to perform phase compensation, so that the phase of the radio frequency signal output by the remote end remains stable.
进一步的，所述步骤2中利用相位比较组件进行相位差检测的具体步骤如下：Further, the specific steps of using the phase comparison component to detect the phase difference in the step 2 are as follows:
S201：相位比较组件中的声光移频器对所述参考光信号进行移频，并对返回的传输光信号和移频后的参考光信号进行耦合；S201: The acousto-optic frequency shifter in the phase comparison component shifts the frequency of the reference optical signal, and couples the returned transmission optical signal and the frequency-shifted reference optical signal;
S202：利用两个光带通滤波器，分别滤出耦合后的传输光信号和移频参考光信号的+1阶光边带和-1阶光边带，并分别利用两个光电探测器进行检测，得到两个低频信号；；S202: Use two optical band-pass filters to filter out the +1-order optical sidebands and -1-order optical sidebands of the coupled transmission optical signal and the frequency-shifted reference optical signal, respectively, and use two photodetectors to perform Detect, get two low frequency signals;
S203：对所述两低频电信号进行相位差检测。S203: Perform phase difference detection on the two low-frequency electrical signals.
综上所述，由于采用了上述技术方案，本发明的有益效果是：In summary, owing to adopting above-mentioned technical scheme, the beneficial effect of the present invention is:
1.射频信号稳相传输装置中的相位比较组件，通过移频外差的方法，将相位差大小不变地从高频信号转移到低频信号上，提高了相位差检测的精度，进而提高稳相精度。1. The phase comparison component in the RF signal phase-stable transmission device transfers the phase difference from the high-frequency signal to the low-frequency signal without changing the size of the phase difference through the method of frequency-shifting heterodyne, which improves the accuracy of the phase difference detection, thereby improving the stability phase accuracy.
2.相位比较组件中未使用高频光电探测器和高频电子鉴相器，仅采用低频光电探测器和低频电子鉴相器，降低了系统成本，同时提高了系统的工作带宽。2. The phase comparison component does not use high-frequency photodetectors and high-frequency electronic phase detectors, but only uses low-frequency photodetectors and low-frequency electronic phase detectors, which reduces the system cost and improves the working bandwidth of the system.
3.光载射频信号产生模块采用载波抑制的双边带调制方式，克服了在光纤中传输时由色散导致的信号周期性衰落现象，实现长距离传输。3. The optical radio frequency signal generation module adopts carrier suppression double sideband modulation method, which overcomes the periodic signal fading phenomenon caused by dispersion during transmission in optical fiber, and realizes long-distance transmission.
附图说明Description of drawings
本发明将通过例子并参照附图的方式说明，其中：The invention will be illustrated by way of example with reference to the accompanying drawings, in which:
图1是本发明的整体示意图；Fig. 1 is the overall schematic diagram of the present invention;
图2是2×2光耦合器输出光信号L3的光谱图。FIG. 2 is a spectrum diagram of the output optical signal L3 of the 2×2 optical coupler.
具体实施方式Detailed ways
本说明书中公开的所有特征，或公开的所有方法或过程中的步骤，除了互相排斥的特征和/或步骤以外，均可以以任何方式组合。All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and/or steps.
下面结合图1、图2对本发明作详细说明。The present invention will be described in detail below in conjunction with FIG. 1 and FIG. 2 .
一种射频信号稳相传输装置，包括本地端，所述本地端通过光纤与远端光连接，所述本地端包括光载射频信号产生模块和与所述光载射频信号产生模块光连接的相位比较与控制模块，所述相位比较与控制模块包括光分束器和与所述光分束器的输出端1光连接的相位补偿器，所述相位补偿器连接所述光纤，还包括相位比较组件，所述相位比较组件包括光耦合器，所述相位补偿器与光耦合器光连接，所述光分束器的输出端口2连接声光移频器，所述声光移频器与光耦合器光连接，所述光耦合器的输出端分别与光带通滤波器A和光带通滤波器B光连接，所述光带通滤波器A与光电探测器A光连接，所述光带通滤波器B与所述光电探测器B光连接，所述光电探测器A和光电探测器B的输出端均与电子鉴相器电连接，所述电子鉴相器与相位补偿器电连接。A radio frequency signal phase-stable transmission device, including a local end, the local end is optically connected to the remote end through an optical fiber, the local end includes an optical radio frequency signal generation module and a phase optically connected to the optical radio frequency signal generation module A comparison and control module, the phase comparison and control module includes an optical beam splitter and a phase compensator optically connected to the output end 1 of the optical beam splitter, the phase compensator is connected to the optical fiber, and also includes a phase comparison component, the phase comparison component includes an optical coupler, the phase compensator is optically connected to the optical coupler, the output port 2 of the optical beam splitter is connected to an acousto-optic frequency shifter, and the acousto-optic frequency shifter is connected to an optical The coupler is optically connected, and the output end of the optical coupler is optically connected with the optical bandpass filter A and the optical bandpass filter B respectively, and the optical bandpass filter A is optically connected with the photodetector A, and the optical bandpass filter A is optically connected with the photodetector A, and the optical bandpass filter A The pass filter B is optically connected to the photodetector B, the output terminals of the photodetector A and the photodetector B are both electrically connected to an electronic phase detector, and the electronic phase detector is electrically connected to a phase compensator.
所述光电探测器A和光电探测器B均为低频光电探测器。The photodetectors A and B are both low-frequency photodetectors.
所述光载射频信号产生模块包括光源、微波源和电光强度调制器，所述光源与电光强度调制器光连接，所述微波源电与所述电光强度调制器电连接，所述电光强度调制器与所述光分束器光连接。The light-borne radio frequency signal generating module includes a light source, a microwave source and an electro-optical intensity modulator, the light source is optically connected to the electro-optic intensity modulator, the microwave source is electrically connected to the electro-optical intensity modulator, and the electro-optical intensity modulator device is optically connected to the optical beam splitter.
所述远端为射频信号恢复模块，所述射频信号恢复模块包括与光纤光连接的光反射器，所述光反射器连接高频光电探测器，所述高频光电探测器输出相位稳定的射频信号。The remote end is a radio frequency signal recovery module, and the radio frequency signal recovery module includes an optical reflector connected to an optical fiber, the optical reflector is connected to a high-frequency photodetector, and the high-frequency photodetector outputs a phase-stable radio frequency Signal.
所述光反射器反射来自光纤的部分光，所述光反射器由光环形器与光分束器的组合构成或由法拉第旋转镜构成。The optical reflector reflects part of the light from the optical fiber, and the optical reflector is formed by a combination of an optical circulator and an optical beam splitter or by a Faraday rotating mirror.
所述相位补偿器由可调光延时线、光线拉伸器和温控光线卷中的一个构成。The phase compensator is composed of one of an adjustable light delay line, a light stretcher and a temperature-controlled light roll.
一种射频信号稳相传输方法，包括以下步骤：A radio frequency signal phase-stable transmission method, comprising the following steps:
步骤1：本地端利用载波抑制的双边带调制方法产生调制信号并分光为传输光信号和参考光信号；Step 1: The local end uses the double sideband modulation method of carrier suppression to generate a modulation signal and split it into a transmission optical signal and a reference optical signal;
步骤2：所述传输光信号经光纤传输至远端，并由远端返回至本地端，与参考光信号一并传输至相位比较组件进行相位差检测；Step 2: The transmitted optical signal is transmitted to the remote end through the optical fiber, and returned to the local end from the remote end, and transmitted to the phase comparison component together with the reference optical signal for phase difference detection;
步骤3：本地端利用相位差检测的输出信号，控制相位补偿器进行相位补偿，使远端输出的射频信号相位保持稳定。Step 3: The local end uses the output signal of the phase difference detection to control the phase compensator to perform phase compensation, so that the phase of the radio frequency signal output by the remote end remains stable.
进一步的，所述步骤2中利用相位比较组件进行相位差检测的具体步骤如下：Further, the specific steps of using the phase comparison component to detect the phase difference in the step 2 are as follows:
S201：相位比较组件中的声光移频器对所述参考光信号进行移频，并对返回的传输光信号和移频后的参考光信号进行耦合；S201: The acousto-optic frequency shifter in the phase comparison component shifts the frequency of the reference optical signal, and couples the returned transmission optical signal and the frequency-shifted reference optical signal;
S202：利用两个光带通滤波器，分别滤出耦合后的传输光信号和移频参考光信号的+1阶光边带和-1阶光边带，并分别利用两个光电探测器进行检测，得到两个低频信号；；S202: Use two optical band-pass filters to filter out the +1-order optical sidebands and -1-order optical sidebands of the coupled transmission optical signal and the frequency-shifted reference optical signal, respectively, and use two photodetectors to perform Detect, get two low frequency signals;
S203：对所述两低频电信号进行相位差检测。S203: Perform phase difference detection on the two low-frequency electrical signals.
具体实施例1Specific embodiment 1
一种射频信号稳相传输装置，包括本地端，所述本地端通过光纤与远端光连接，所述本地端包括光载射频信号产生模块和与所述光载射频信号产生模块光连接的相位比较与控制模块，所述相位比较与控制模块包括光分束器和与所述光分束器的输出端1光连接的相位补偿器的正向输入端，所述相位补偿器的正向输出端与反向输入端均连接所述光纤；A radio frequency signal phase-stable transmission device, including a local end, the local end is optically connected to the remote end through an optical fiber, the local end includes an optical radio frequency signal generation module and a phase optically connected to the optical radio frequency signal generation module A comparison and control module, the phase comparison and control module includes an optical beam splitter and a positive input end of a phase compensator optically connected to the output end 1 of the optical beam splitter, and the positive output of the phase compensator Both the end and the reverse input end are connected to the optical fiber;
还包括相位比较组件，所述相位比较组件包括光耦合器，所述耦合器为2×2光耦合器，所述相位补偿器的反向输出端与光耦合器的输入端口1光连接，所述光分束器的输出端口2连接声光移频器，所述声光移频器与光耦合器的输入端口2光连接，所述光耦合器的输出端口1连接光带通滤波器A，所述光带通滤波器A与低频光电探测器A光连接，所述低频光电探测器A的输出端与电子鉴相器的输入端口1电连接，所述光耦合器的输出端口2连接光带通滤波器B，所述光带通滤波器B与低频光电探测器B光连接，所述低频光电探测器B的输出端与电子鉴相器的输入端口2电连接，所述电子鉴相器的输出端与相位补偿器电连接；所述相位补偿器由光线拉伸器构成。It also includes a phase comparison component, the phase comparison component includes an optical coupler, the coupler is a 2×2 optical coupler, the reverse output end of the phase compensator is optically connected to the input port 1 of the optical coupler, the The output port 2 of the optical beam splitter is connected to the acousto-optic frequency shifter, and the acousto-optic frequency shifter is optically connected to the input port 2 of the optical coupler, and the output port 1 of the optical coupler is connected to the optical bandpass filter A , the optical bandpass filter A is optically connected to the low-frequency photodetector A, the output end of the low-frequency photodetector A is electrically connected to the input port 1 of the electronic phase detector, and the output port 2 of the optical coupler is connected to An optical bandpass filter B, the optical bandpass filter B is optically connected to the low-frequency photodetector B, the output end of the low-frequency photodetector B is electrically connected to the input port 2 of the electronic phase detector, and the electronic detector The output end of the phaser is electrically connected with the phase compensator; the phase compensator is composed of a light stretcher.
所述远端为射频信号恢复模块，所述射频信号恢复模块包括与光纤光连接的光反射器，所述光反射器反射来自光纤的部分光，反射的光随光纤传入相位补偿器中，所述反射器透射的光传输至于所述光反射器光连接的高频光电探测器，所述高频光电探测器输出相位稳定的射频信号；所述光反射器由法拉第旋转镜构成。The remote end is a radio frequency signal recovery module, and the radio frequency signal recovery module includes an optical reflector connected to the optical fiber, the optical reflector reflects part of the light from the optical fiber, and the reflected light is transmitted into the phase compensator along with the optical fiber, The light transmitted by the reflector is transmitted to the high-frequency photodetector optically connected to the light reflector, and the high-frequency photodetector outputs a phase-stable radio frequency signal; the light reflector is composed of a Faraday rotating mirror.
所述光载射频信号产生模块包括光源、微波源和电光强度调制器，所述光源光连接电光强度调制器，所述微波源电连接所述电光强度调制器，所述电光强度调制器与所述光分束器的输入端光连接。The light-borne radio frequency signal generation module includes a light source, a microwave source and an electro-optical intensity modulator, the light source is optically connected to the electro-optic intensity modulator, the microwave source is electrically connected to the electro-optic intensity modulator, and the electro-optical intensity modulator is connected to the electro-optical intensity modulator. The input end of the optical beam splitter is optically connected.
具体实施例2Specific embodiment 2
本实施例基于实施例1，主要阐述本发明的传输方法。This embodiment is based on Embodiment 1, and mainly describes the transmission method of the present invention.
步骤1：设本地端电光强度调制器输出的载波抑制双边带调制的光载波信号为L1，所述光载波信号中包含两个光波Ω1和Ω2，由于本装置及方法只关注相位信息，不关注光载波信号幅度大小，因此将光波Ω1和Ω2分别表示为：Step 1: Set the carrier-suppressed double-sidedband modulated optical carrier signal output by the local electro-optical intensity modulator as L1, and the optical carrier signal contains two optical waves Ω1 and Ω2. Since this device and method only focus on phase information, they do not pay attention to The magnitude of the optical carrier signal, so the light waves Ω1 and Ω2 are expressed as:
其中，j表示虚数，t表示时间，ωc表示激光源输出的光载波信号的角频率，ωRF表示微波源输出的射频信号的角频率，光波Ω1的相位，表示光波Ω2的相位。Wherein, j represents an imaginary number, t represents time, ω c represents the angular frequency of the optical carrier signal output by the laser source, and ω RF represents the angular frequency of the radio frequency signal output by the microwave source, The phase of the light wave Ω1, Indicates the phase of light wave Ω2.
步骤2：光载波信号L1经光分束器分光为传输光信号与参考光信号，所述传输光信号经光纤往返传输一次，由于外界温度变化及机械振动，信号的相位发生了随机抖动，传输光信号回到本地端后变为光信号L2，所述光信号L2包括两个光波Ω3和Ω4，分别表示为：Step 2: The optical carrier signal L1 is split into a transmission optical signal and a reference optical signal by an optical beam splitter. The transmission optical signal is transmitted back and forth through an optical fiber. Due to external temperature changes and mechanical vibrations, the phase of the signal fluctuates randomly, and the transmission After the optical signal returns to the local end, it becomes an optical signal L2, and the optical signal L2 includes two optical waves Ω3 and Ω4, respectively expressed as:
其中，j表示虚数，t表示时间，ωc表示激光源输出的光载波信号的角频率，ωRF表示微波源输出的射频信号的角频率，光波Ω3的相位，表示光波Ω4的相位。Wherein, j represents an imaginary number, t represents time, ω c represents the angular frequency of the optical carrier signal output by the laser source, and ω RF represents the angular frequency of the radio frequency signal output by the microwave source, The phase of the light wave Ω3, Indicates the phase of light wave Ω4.
步骤3：由于参考光信号为光载波信号L1中的一部分，因此参考光信号与所述光载波信号实质相同；所述参考光信号经声光移频器后移频Δω(小于100MHz)，得到光信号L1′，其中光信号L1＇包括Ω1＇和Ω2＇，Ω1＇和Ω2＇表示为：Step 3: Since the reference optical signal is a part of the optical carrier signal L1, the reference optical signal is substantially the same as the optical carrier signal; the reference optical signal is frequency-shifted by Δω (less than 100MHz) after the acousto-optic frequency shifter to obtain The optical signal L1', wherein the optical signal L1' includes Ω1' and Ω2', and Ω1' and Ω2' are expressed as:
其中，j表示虚数，t表示时间，ωc表示激光源输出的光载波信号的角频率，ωRF表示微波源输出的射频信号的角频率，光波Ω1＇的相位，表示光波Ω2＇的相位。Wherein, j represents an imaginary number, t represents time, ω c represents the angular frequency of the optical carrier signal output by the laser source, and ω RF represents the angular frequency of the radio frequency signal output by the microwave source, The phase of light wave Ω1', Indicates the phase of light wave Ω2'.
由于参考光信号经过声光移频器移频后改变相同的频率，因此Ω1＇和Ω2＇的相位差与Ω1和Ω2的相位差的差值很小，且为一个固定值，可忽略不计，近似认为：Since the reference optical signal changes the same frequency after being frequency-shifted by the acousto-optic frequency shifter, the difference between the phase difference between Ω1' and Ω2' and the phase difference between Ω1 and Ω2 is very small, and it is a fixed value, which can be ignored. Approximately think:
光信号L1＇与光信号L2在2×2的光耦合器中耦合得到光信号L3，所述光信号L3的光谱图如图2所示；The optical signal L1' and the optical signal L2 are coupled in a 2×2 optical coupler to obtain an optical signal L3, and the spectrum diagram of the optical signal L3 is shown in Figure 2;
光信号L3经过光带通滤波器A后得到光信号L4，光信号L3经过光带通滤波器B后得到光信号L5，光带通滤波器A的通带中心频率为ωc-ωRF，光带通滤波器B的通带中心频率为ωc+ωRF，则光信号L4包含两个光波Ω1＇和Ω3，光信号L5包含两个光波Ω2＇和Ω4；After the optical signal L3 passes through the optical band-pass filter A, the optical signal L4 is obtained, and after the optical signal L3 passes through the optical band-pass filter B, the optical signal L5 is obtained. The center frequency of the passband of the optical band-pass filter A is ω c -ω RF , The passband center frequency of the optical bandpass filter B is ω c +ω RF , then the optical signal L4 contains two light waves Ω1' and Ω3, and the optical signal L5 contains two light waves Ω2' and Ω4;
光信号L4经过低频光电探测器A拍频后，检测得到频率大小为Δω的低频电信号V1；光信号L5经过低频光电探测器B拍频后，检测得到频率大小为Δω的低频电信号V2，After the optical signal L4 is beat by the low-frequency photodetector A, a low-frequency electrical signal V 1 with a frequency of Δω is detected; after the optical signal L5 is beat by the low-frequency photodetector B, a low-frequency electrical signal V with a frequency of Δω is detected. 2 ,
具体表示为：Specifically expressed as:
步骤4：将电信号V1和V2输入到低频鉴相器中，鉴相器的输出电压由V1和V2的相位差决定，表示为：Step 4: Input the electrical signals V1 and V2 into the low-frequency phase detector, and the output voltage of the phase detector is determined by the phase difference of V1 and V2 Decide, Expressed as:
其中，为经过光纤往返传输一次后传输光信号上所载射频号的相位，而为本地端参考光信号上所载射频信号的相位，则即为待求传输射频信号的相位抖动，利用相位抖动信息控制相位补偿器，对传输的射频信号的相位抖动进行预补偿，最终在远端得到相位稳定的射频信号。in, In order to transmit the phase of the radio frequency signal carried on the optical signal after a round-trip transmission through the optical fiber, and is the phase of the radio frequency signal carried on the local reference optical signal, then That is, to obtain the phase jitter of the RF signal to be transmitted, the phase jitter information is used to control the phase compensator to pre-compensate the phase jitter of the transmitted RF signal, and finally obtain a phase-stable RF signal at the remote end.
本发明的工作原理为：Working principle of the present invention is:
本地端的光载射频信号产生模块利用电光强度调制器，采用抑制载波的双边带调制方式产生调制光信号，调制光信号经过光分束器一分为二，一部分作为传输光信号送入传输光纤并由远端的光反射器返回到本地端，另一部分作为参考光信号，与回到本地端的传输光信号一同送入相位比较组件；在相位比较组件里，参考光信号经过声光移频器移频(小于100MHz)后，与传输光信号通过2×2光耦合器耦合后分别进入光带通滤波器A和光带通滤波器B，光带通滤波器A滤出耦合后光信号的+1阶光边带并由低频光电探测器A检测，光带通滤波器B滤出耦合后光信号的-1阶光边带并由低频光电探测器B检测；电子鉴相器对低频光电探测器A和低频光电探测器B的输出信号进行相位差检测，电子鉴相器的输出信号控制相位补偿器进行相位补偿，实现射频信号的稳相传输。所述电光强度调制器产生的+1、-1阶光边带的频率间隔为射频信号的频率。The optical-carrying radio frequency signal generation module at the local end uses an electro-optical intensity modulator to generate a modulated optical signal using a double-sideband modulation method that suppresses the carrier. The modulated optical signal is divided into two by an optical beam splitter, and a part is sent into the transmission optical fiber as a transmission optical signal and sent to the optical fiber. The optical reflector at the far end returns to the local end, and the other part is used as a reference optical signal, which is sent to the phase comparison component together with the transmission optical signal returned to the local end; in the phase comparison component, the reference optical signal is shifted by an acousto-optic frequency shifter. frequency (less than 100MHz), the transmitted optical signal is coupled with a 2×2 optical coupler and enters the optical band-pass filter A and optical band-pass filter B respectively, and the optical band-pass filter A filters out the +1 of the coupled optical signal The first-order optical sideband is detected by the low-frequency photodetector A, and the optical band-pass filter B filters out the -1-order optical sideband of the coupled optical signal and is detected by the low-frequency photodetector B; the electronic phase detector is used for the low-frequency photodetector Phase difference detection is performed on the output signals of A and low-frequency photodetector B, and the output signal of the electronic phase detector controls the phase compensator to perform phase compensation to realize the stable phase transmission of radio frequency signals. The frequency interval of the +1 and -1 order optical sidebands generated by the electro-optic intensity modulator is the frequency of the radio frequency signal.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810268054.4A CN108494489A (en) | 2018-03-27 | 2018-03-27 | A kind of radiofrequency signal surely mutually transmits device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810268054.4A CN108494489A (en) | 2018-03-27 | 2018-03-27 | A kind of radiofrequency signal surely mutually transmits device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108494489A true CN108494489A (en) | 2018-09-04 |
Family
ID=63317185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810268054.4A Pending CN108494489A (en) | 2018-03-27 | 2018-03-27 | A kind of radiofrequency signal surely mutually transmits device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108494489A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109104245A (en) * | 2018-09-17 | 2018-12-28 | 中国电子科技集团公司第三十八研究所 | Transmission system when multichannel is steady without the non-co-operation signal of spuious broadband |
| CN109286124A (en) * | 2018-09-18 | 2019-01-29 | 上海交通大学 | Laser linewidth compression method and system |
| CN109412687A (en) * | 2018-11-09 | 2019-03-01 | 浙江大学 | A kind of optical path time delay rapid measurement device based on frequency domain standing wave method |
| CN111092659A (en) * | 2019-11-29 | 2020-05-01 | 电子科技大学 | A Double-chirp Signal Generation System Based on Stimulated Brillouin Scattering |
| CN111786726A (en) * | 2020-06-08 | 2020-10-16 | 深圳金信诺高新技术股份有限公司 | Radio frequency optical transmission system and method for phase-stable transmission |
| CN111834873A (en) * | 2020-07-29 | 2020-10-27 | 中国电子科技集团公司第三十四研究所 | Optical fiber phase stabilizing device based on tunable laser |
| CN112260758A (en) * | 2020-11-03 | 2021-01-22 | 中航光电科技股份有限公司 | Bidirectional homologous phase-coherent microwave optical fiber phase-stable transmission method |
| CN112291015A (en) * | 2020-08-19 | 2021-01-29 | 扬州船用电子仪器研究所(中国船舶重工集团公司第七二三研究所) | STM32 processor-based microwave phase-stable transmission system and method |
| CN112367120A (en) * | 2020-10-23 | 2021-02-12 | 西北工业大学 | Microwave local oscillation source double-frequency optical fiber phase-stabilizing transmission system |
| CN113098622A (en) * | 2021-03-14 | 2021-07-09 | 北京邮电大学 | Frequency transfer device based on bidirectional phase jitter compensation of optical frequency comb |
| CN113259007A (en) * | 2021-06-24 | 2021-08-13 | 上海交通大学 | Cascaded optical frequency transfer device and method |
| CN113391136A (en) * | 2021-05-31 | 2021-09-14 | 重庆邮电大学 | Microwave photon frequency measurement device and method based on fixed low-frequency detection |
| CN114826406A (en) * | 2021-05-27 | 2022-07-29 | 中航光电科技股份有限公司 | Ultra-wideband radio frequency optical fiber phase-stabilized transmission system based on magnetic suspension technology |
| CN115102619A (en) * | 2022-07-18 | 2022-09-23 | 中国电子科技集团公司第四十三研究所 | Radio frequency signal self-adaptive optical fiber phase-stable transmission device and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701529A (en) * | 2013-12-09 | 2014-04-02 | 北京邮电大学 | Signal time delay stable transmission method and system of broadband |
| CN103716089A (en) * | 2013-12-26 | 2014-04-09 | 南京航空航天大学 | RF signal optical fiber phase-stabilized transmission method and system |
| CN104065416A (en) * | 2014-06-26 | 2014-09-24 | 中国科学院半导体研究所 | Microwave signal optical fiber phase stable transmission system based on microwave phase shifter |
| CN104467967A (en) * | 2014-10-21 | 2015-03-25 | 中国科学院半导体研究所 | Microwave signal optical fiber steady-phase transmission system based on phase compensation |
| CN105141365A (en) * | 2015-06-11 | 2015-12-09 | 北京邮电大学 | Device and method for getting delay jitter of optical fiber link |
-
2018
- 2018-03-27 CN CN201810268054.4A patent/CN108494489A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103701529A (en) * | 2013-12-09 | 2014-04-02 | 北京邮电大学 | Signal time delay stable transmission method and system of broadband |
| CN103716089A (en) * | 2013-12-26 | 2014-04-09 | 南京航空航天大学 | RF signal optical fiber phase-stabilized transmission method and system |
| CN104065416A (en) * | 2014-06-26 | 2014-09-24 | 中国科学院半导体研究所 | Microwave signal optical fiber phase stable transmission system based on microwave phase shifter |
| CN104467967A (en) * | 2014-10-21 | 2015-03-25 | 中国科学院半导体研究所 | Microwave signal optical fiber steady-phase transmission system based on phase compensation |
| CN105141365A (en) * | 2015-06-11 | 2015-12-09 | 北京邮电大学 | Device and method for getting delay jitter of optical fiber link |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109104245A (en) * | 2018-09-17 | 2018-12-28 | 中国电子科技集团公司第三十八研究所 | Transmission system when multichannel is steady without the non-co-operation signal of spuious broadband |
| CN109286124A (en) * | 2018-09-18 | 2019-01-29 | 上海交通大学 | Laser linewidth compression method and system |
| CN109412687A (en) * | 2018-11-09 | 2019-03-01 | 浙江大学 | A kind of optical path time delay rapid measurement device based on frequency domain standing wave method |
| CN111092659A (en) * | 2019-11-29 | 2020-05-01 | 电子科技大学 | A Double-chirp Signal Generation System Based on Stimulated Brillouin Scattering |
| CN111786726A (en) * | 2020-06-08 | 2020-10-16 | 深圳金信诺高新技术股份有限公司 | Radio frequency optical transmission system and method for phase-stable transmission |
| CN111834873A (en) * | 2020-07-29 | 2020-10-27 | 中国电子科技集团公司第三十四研究所 | Optical fiber phase stabilizing device based on tunable laser |
| CN112291015A (en) * | 2020-08-19 | 2021-01-29 | 扬州船用电子仪器研究所(中国船舶重工集团公司第七二三研究所) | STM32 processor-based microwave phase-stable transmission system and method |
| CN112367120A (en) * | 2020-10-23 | 2021-02-12 | 西北工业大学 | Microwave local oscillation source double-frequency optical fiber phase-stabilizing transmission system |
| CN112260758A (en) * | 2020-11-03 | 2021-01-22 | 中航光电科技股份有限公司 | Bidirectional homologous phase-coherent microwave optical fiber phase-stable transmission method |
| CN113098622A (en) * | 2021-03-14 | 2021-07-09 | 北京邮电大学 | Frequency transfer device based on bidirectional phase jitter compensation of optical frequency comb |
| CN114826406A (en) * | 2021-05-27 | 2022-07-29 | 中航光电科技股份有限公司 | Ultra-wideband radio frequency optical fiber phase-stabilized transmission system based on magnetic suspension technology |
| CN114826406B (en) * | 2021-05-27 | 2024-01-09 | 中航光电科技股份有限公司 | Ultra-wideband radio frequency optical fiber stable phase transmission system based on magnetic suspension technology |
| CN113391136A (en) * | 2021-05-31 | 2021-09-14 | 重庆邮电大学 | Microwave photon frequency measurement device and method based on fixed low-frequency detection |
| CN113391136B (en) * | 2021-05-31 | 2023-09-26 | 重庆邮电大学 | A microwave photon frequency measurement device and method based on fixed low-frequency detection |
| CN113259007A (en) * | 2021-06-24 | 2021-08-13 | 上海交通大学 | Cascaded optical frequency transfer device and method |
| CN115102619A (en) * | 2022-07-18 | 2022-09-23 | 中国电子科技集团公司第四十三研究所 | Radio frequency signal self-adaptive optical fiber phase-stable transmission device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108494489A (en) | A kind of radiofrequency signal surely mutually transmits device and method | |
| CN104065416B (en) | Based on the microwave signal stabilized fiber phase transmission system of microwave phase shifter | |
| CN102591091B (en) | Method and system for generating photon microwave signal with stable phase | |
| CN105141365B (en) | A kind of device and method for obtaining fiber link delay variation | |
| US8229254B2 (en) | Systems and methods for polarization mode dispersion mitigation | |
| CN106656322B (en) | A Method of Realizing Instantaneous Frequency Measurement Using Phase Modulator | |
| US20100129088A1 (en) | Optical transmission apparatus | |
| CN103955028A (en) | Broadband tunable single-passband microwave photon filter generating system | |
| CN104202090B (en) | The microwave signal long-distance optical fiber steady phase transmitting device of optically-based phase conjugation | |
| US10498457B2 (en) | Optical carrier-suppressed signal generator | |
| CN110530497A (en) | Interference-type optical fiber vibrating sensing demodulating system and method based on optical-electronic oscillator | |
| CN104020334A (en) | Electro-optical phase modulator half-wave voltage measurement system and measurement method | |
| CN107733529B (en) | A kind of triangular wave and square wave signal optical generation and transmission device and method | |
| CN112367120A (en) | Microwave local oscillation source double-frequency optical fiber phase-stabilizing transmission system | |
| JP2018042099A (en) | Measurement method for coherent light receiver | |
| CN103676217A (en) | High-frequency microwave photon phase shifter | |
| Shang et al. | Tunable frequency-doubled optoelectronic oscillator based on a phase modulator in a Sagnac loop | |
| CN106374324A (en) | Tunable double-frequency optoelectronic oscillator system based on polarization modulator | |
| CN106487451B (en) | Microwave photon phase changer and method | |
| CN112698091B (en) | Non-fuzzy microwave photon Doppler frequency shift measuring method based on cascade modulator | |
| CN115459862A (en) | Photon-assisted instantaneous frequency measurement device and method based on radio frequency response complementation | |
| Xu et al. | A continuously tunable microwave photonic notch filter with complex coefficient based on phase modulation | |
| JP6453593B2 (en) | Microwave sensor and microwave measurement method | |
| CN110830122A (en) | Radio frequency phase coding signal generation device and method based on microwave photon technology | |
| JPH0643411A (en) | Method and apparatus for controlling operating point of optical modulator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180904 |