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Optical fiber phase synchronization system based on optical active compensation

A technology of active compensation and phase synchronization, applied in optical fiber transmission, transmission system, electromagnetic wave transmission system, etc., can solve the problems of inability to transmit multiple frequency signals and time signals at the same time, limit the application range, etc., and improve the coherence of time-frequency transmission. Effect

Active Publication Date: 2021-07-09
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Description
  • Claims
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Problems solved by technology

[0005] Since the above technical solution adopts a passive compensation method, it can only achieve phase synchronization for specific frequency signals, and cannot transmit multiple frequency signals and time signals at the same time, which will limit its application scope to a certain extent

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  • Optical fiber phase synchronization system based on optical active compensation
  • Optical fiber phase synchronization system based on optical active compensation
  • Optical fiber phase synchronization system based on optical active compensation

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the embodiments and accompanying drawings, but the protection scope of the present invention should not be limited thereby.

[0032] see figure 1 , figure 1It is a block diagram of the optical fiber phase synchronization system based on optical active compensation in the present invention. It can be seen from the figure that the optical fiber phase synchronization system based on optical active compensation in the present invention includes a frequency reference 10, a phase-locked frequency multiplier 11, a pulse generator 12, and a first laser. 13. The second laser 14, the first 1×2 optical coupler 15, the first polarization scrambler 16, the first circulator 17, the optical delay line 18, the optical fiber 19, the second circulator 20, the first demultiplexer 21, the first photodetector 22, the second photodetector 23, the first radio frequency amplifier 24, the first pulse distribution amplifi...

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Abstract

The invention discloses an optical fiber phase synchronization system based on optical active compensation. The system comprises a frequency reference, a phase-locked frequency multiplier, a pulse generator, a laser, a 1 * 2 optical coupler, a scrambler, a circulator, an optical delay line, an optical fiber, a wavelength division demultiplexer, a photoelectric detector, a radio frequency amplifier, a pulse distribution amplifier, a radio frequency power divider, a phase discriminator, a time interval counter, a delay processing unit and a driving circuit. According to the invention, the phase consistency of frequency signals under the operations such as closing and restarting or optical fiber routing change can be ensured, and the phase synchronization is realized, so that the time-frequency transmission coherence is improved, and the requirements of coherent detection applications such as a distributed radar array can be met.

Description

technical field [0001] The present invention relates to the field of optical fiber time-frequency transmission, in particular, to an optical fiber phase synchronization system based on optical active compensation, the main purpose of which is to use the optical delay line active compensation method to realize the synchronization of frequency signals transmitted through optical fibers under different system states The phases can be kept consistent, improving the coherence of time-frequency transmission, and can be applied to coherent array detection and other fields. Background technique [0002] In recent years, with the rapid development of atomic frequency standards, time and frequency transfer technology has also been continuously improved to meet cutting-edge basic research and major application needs. Thanks to the advantages of low loss, anti-electromagnetic interference, and high reliability of optical fiber links, optical fiber time-frequency transmission technology...

Claims

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Application Information

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IPC IPC(8): H04B10/61H04B10/25
CPCH04B10/6165
Inventor 吴瑞杨飞孙延光魏芳桂有珍蔡海文
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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