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Double delay line for single fiber bidirectional transmission

A single-fiber bidirectional, delay line technology, used in the coupling of optical waveguides, instruments, optical guides, etc., can solve the problems of complex production and small adjustable range, and achieve the effect of simple and convenient production.

Active Publication Date: 2020-08-04
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of this type of fiber delay line is that it can achieve high-precision continuous adjustment of the delay, but the production is complicated and the adjustable range is small

Method used

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  • Double delay line for single fiber bidirectional transmission
  • Double delay line for single fiber bidirectional transmission
  • Double delay line for single fiber bidirectional transmission

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1: Delay generation of single frequency signal transmission

[0042] Such as image 3 As shown, the overall use of figure 1 The structure shown includes dual-channel optical wavelength division multiplexer: the first dual-channel optical wavelength division multiplexer 11, the second dual-channel optical wavelength division multiplexer 12; three-channel optical fiber circulator: the first forward three-channel optical fiber ring device A1, the first reverse three-channel optical fiber circulator B1; ordinary bidirectional delay line 3; Faraday rotation mirror 2. The multi-channel dense optical wavelength division multiplexer has two channels, which can selectively pass bidirectional signals with different wavelengths. The channel wavelength is selected according to the actual carrier wavelength; the first forward three-channel optical fiber circulator A1 and the first reverse The forward frequency signal and the reverse frequency signal are respectively pas...

Embodiment 2

[0043] Embodiment 2: Delay Generation of Simultaneous Interpretation of Time and Frequency Dual Signals

[0044] Such as Figure 4 As shown, the overall use of figure 1 The structure shown includes four-channel optical wavelength division multiplexer: the first dual-channel optical wavelength division multiplexer 11, the second dual-channel optical wavelength division multiplexer 12; three-channel optical fiber circulator: the first forward three-channel optical fiber ring A1, the first reverse three-channel optical fiber circulator B1, the second forward three-channel optical fiber circulator A2, the second reverse three-channel optical fiber circulator B2; ordinary two-way delay line 3; Faraday mirror 2; multi-channel The dense optical wavelength division multiplexer has four channels, which can selectively pass bidirectional signals with different wavelengths. The channel wavelength is selected according to the actual carrier wavelength; the first forward three-channel opt...

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Abstract

The invention discloses a delay line enhancement scheme for high-precision optical fiber time-frequency transmission. The double delay line comprises a first multi-channel intensive optical wavelengthdivision multiplexer, a second multi-channel intensive optical wavelength division multiplexer, a Faraday rotating mirror and a common bidirectional delay line; n forward three-channel optical fibercirculators and n reverse three-channel optical fiber circulators are respectively connected between the first multi-channel intensive optical wavelength division multiplexer and the second multi-channel intensive optical wavelength division multiplexer; and a common bidirectional delay line is arranged between the first multi-channel intensive optical wavelength division multiplexer and the Faraday rotating mirror. The delay line is simple and convenient to manufacture, does not need to reform the delay line body, can change the maximum range of the delay to twice of the original under the condition that the volume of the optical fiber delay line is unchanged, and can change the change amount of the time delay in a unit time of the same bidirectional optical fiber delay line to twice of the original at the same time.

Description

technical field [0001] The invention relates to a new delay line method, especially a double delay line for single-fiber two-way transmission, which is mainly used for link delay control of high-precision time and frequency signal transmission, and can also be used for other Delay generation and control. Background technique [0002] Frequency standards are the basis of various important technologies in modern society, such as navigation and positioning, Internet communication, precise measurement of physical constants, etc. High-precision time-frequency transmission technology has important applications in these areas. In the transmission of high-precision radio frequency and time signals, the slow change of the optical path caused by the temperature fluctuation of the optical fiber link and the rapid change of the optical path in a small range caused by the vibration of the optical fiber link caused by the mechanical action will cause a large-scale drift and relatively hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/293G02B6/28
Inventor 王家亮桂有珍程楠姜明宇吴瑞冯子桐孙延光蔡海文韩申生
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI