Optical time domain reflectometer

Abstract

The invention provides an optical time domain reflectometer, which is characterized in that an optical isolation assembly of the optical time domain reflectometer is respectively connected with a light source and a photoelectric detection assembly, and the light source is either of a first light source and a second light source, wherein a first port of a first optical switch in the first light source is connected with a first pulse laser, a second port of the first optical switch is connected with a narrow-band filter, a third port of the first optical switch is connected with an optical isolation assembly, and two ends of a first polarizer are respectively connected with the narrow-band filter and the optical isolation assembly; two ends of a second polarizer in the second light source are respectively connected with two ends of a second pulse laser and the optical isolation assembly, and a third pulse laser is connected with the optical isolation assembly. According to the invention,the first light source or the second light source can provide wide-linewidth pulsed light required by the OTDR and narrow-linewidth pulsed light required by the POTDR for the optical time domain reflectometer, thereby realizing detection of various parameters of the optical fiber, and expanding the application range of the optical time domain reflectometer.

Description

technical field [0001] The invention relates to the technical field of optical fiber testing, in particular to an optical time domain reflectometer. Background technique [0002] When the optical signal is transmitted in the optical fiber, because the optical fiber will be affected by environmental factors such as external disturbance, temperature, strain, and displacement, the polarization state, power, wavelength, phase and other parameters of the optical signal will change. The optical fiber testing technology is to detect the optical fiber These parameters of Zhongguang can obtain the change information of the surrounding environment, which is a brand new technology. [0003] Optical time domain reflectometer (OTDR) is the main instrument in the field of optical fiber testing technology. It is widely used in the maintenance and construction of optical cable lines, and can measure the length of optical fiber, transmission attenuation of optical fiber, joint attenuation an...

AI Technical Summary

Problems solved by technology

However, compared with ordinary OTDR, POTDR requires strong coherence of laser pulses, and ordinary OTDR laser pulses cannot meet the requirements of POTDR.

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