Optical fiber length transmission device and method capable of accurately controlling temperature

Abstract

The invention provides an optical fiber length transmission device and method capable of accurately controlling temperature. The device comprises a box body, a semiconductor refrigerator, an optical fiber, a metal ring, a cooling fin, a heat insulation layer and a thermosensitive element; a semiconductor refrigerator is arranged in the box body, cooling fins are arranged on the surface of the semiconductor refrigerator, an optical fiber is wound on the metal ring to form an optical fiber ring, the thermal insulation layer wraps the optical fiber ring, an optical fiber pigtail of the optical fiber ring is led out of the thermal insulation layer and the semiconductor refrigerator, one end of the thermosensitive element makes contact with the optical fiber of the optical fiber ring, and the other end of the thermosensitive element extends to the outer side of the box body. According to the invention, accurate calibration of the optical frequency domain reflectometer can be realized, and the calibration blank of the optical frequency domain reflectometer at home and abroad is filled.

Description

technical field [0001] The disclosure belongs to the field of optical frequency domain reflectometer calibration, and in particular relates to an optical fiber length transfer device and method capable of precise temperature control. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] With the rapid development and application of optical fiber communication technology, it is particularly important to ensure the safety and smoothness of optical fiber communication. In the process of maintaining optical fiber communication, it is necessary to have instruments that can accurately measure the transmission characteristics of optical fiber. At present, the optical time domain is used more. Reflectometer (OTDR). However, there are contradictions between the resolution of the OTDR and the signal-to-noise ratio, dynamic range and measurement time. It...

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Problems solved by technology

[0006] (1) The current high-stability optical fiber transmission standard is too short due to structural problems, which can only meet the short-distance high-precision measurement requirements, but cannot meet the long-distance high-precision high-stability measurement requirements

[0007] (2) Due to the long-term aging problem of thermal silica gel, the length of the optical fiber will change during the long-term aging process, which will affect the efficiency of the standard optical fiber used to calibrate the optical frequency domain reflectometer.

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