A double-loop high-precision optical fiber frequency transmission device

A technology of optical fiber frequency and transmission device, which is applied in the direction of optical fiber transmission, transmission system, electromagnetic wave transmission system, etc. It can solve the problems such as the asymmetry of two-way time delay without taking into account, and achieve the effect of eliminating influence and high-precision transmission

Active Publication Date: 2017-07-04
BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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Problems solved by technology

In the above studies, the assumption that the phase noise introduced by the transmission of the signal from the master station to the slave station is the sam

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  • A double-loop high-precision optical fiber frequency transmission device

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[0024] In order to explain the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and drawings. Similar components in the drawings are denoted by the same reference numerals. Those skilled in the art should understand that the content described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

[0025] The dual-ring high-precision optical fiber frequency transmission device provided in this embodiment includes: an optical fiber transmission link, an electrical domain phase compensation loop, and an optical domain phase compensation loop,

[0026] The optical fiber transmission link is used for the two-way transmission of frequency signals between the master and slave stations. It includes: a wavelength division multiplexing module 1 connected to the transmission fiber, and optionally includes: between the wavelength division multiplexing modu...

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Abstract

The invention discloses a double-ring high precision fiber frequency transmission device, comprising a fiber transmission link which is used for two-way transmission of frequency signals between a master station and a slave station; an electric domain phase position compensation loop utilizes a voltage controlled oscillator to realize phase position compensation of frequency signals and a light domain phase position compensation loop utilizes a fiber delay line to realize phase position compensation of frequency signals, which improves the stability of the frequency transmission. The double-ring high precision fiber frequency transmission device disclosed by the invention combines the electric domain phase position compensation and the light domain phase position compensation through the double-ring structure, which effectively eliminates the affect of the two-way time delay dissymmetry factors on the high accuracy fiber frequency transmission device, and realizes the high accuracy transmission of the frequency signals.

Description

technical field [0001] The present invention relates to remote frequency transfer devices. More specifically, it relates to a double-loop high-precision optical fiber frequency transmission device. Background technique [0002] With the continuous improvement of the performance of atomic clocks and the emergence of optical clocks, frequency transmission devices based on satellite links encounter challenges in terms of accuracy, and it is difficult to meet the measurement and comparison of frequency signals with an accuracy below 10E-16 / d. At the same time, fiber optic links with the advantages of low cost, low loss and high reliability have been paid attention to, and various countries have actively carried out research on high-precision frequency transmission devices based on fiber optic links. Japan NICT modulates the 10GHz microwave frequency signal onto the optical carrier, and transmits bidirectionally on the same optical fiber link to form a phase-locked loop, and use...

Claims

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Application Information

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IPC IPC(8): H04B10/2525H04B10/25
Inventor 尚怀嬴阎栋梁张升康
Owner BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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