High-precision long-distance fiber delay line manufacture auxiliary device and manufacture method thereof

Abstract

The invention discloses a high-precision long-distance fiber delay line manufacture method. The manufacture of the high-precision long-distance fiber delay line is conducted through a vector network analyzer instead of a precision reflectometer. According to the high-precision long-distance fiber delay line manufacture method, the manufacture of the high-precision long-distance fiber delay line is achieved through testing fiber delay based on the vector network analyzer, reference fiber is not needed, and errors caused by incorrect reference fiber length and replacement of reference fiber are avoided; meanwhile, by means of vector network analyzer fiber delay, the measuring distance is not restricted, and the manufacture of high-precision long-distance fiber delay line can be completed according to any target delay amount.

Description

technical field [0001] The invention relates to the technical field of optical fiber and precision measurement, in particular to a production auxiliary device and a production method of a high-precision long-distance optical fiber delay line produced and measured by a vector network analyzer. Background technique [0002] The principle of the optical fiber delay line is to control the propagation time of the optical signal in the optical fiber by changing the length of the optical fiber, that is, the propagation delay (see G. Kerser, Optical Fiber Communications, (Third Edition). McGraw-Hill Companies, New York, 2000. ). Optical fiber delay line technology refers to changing the time required for optical signal transmission by changing the length of the optical fiber. Time division multiplexing, optical information processing, and many other fields have very wide applications (see Y.O.Barmenkov, et.al "Electrically tunable photonic true-time-delay line," Opti.Express, vol.1...

AI Technical Summary

Problems solved by technology

However, since a precision reflectometer needs to use a reference fiber, the length and accuracy of the delay line are limited by the length of the reference fiber

If there is an error in the length of the reference fiber or if the reference fiber is replaced during the production process, the produced fiber delay line will also have an error that cannot be corrected; at the same time, the precision reflectometer uses the reflection mode, which needs to consider twice the length of the fiber cut , the calculation is more complex

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