Optical channel attenuation detection system and method with high precision and large dynamic range

Abstract

The invention discloses a high-precision large-dynamic-range optical channel attenuation detection system and method, and the method comprises the steps: selecting and starting a laser with a corresponding wavelength in a multi-wavelength laser group according to the characteristics of a to-be-measured channel, and generating and transmitting an optical signal; directly accessing the optical signal to a photoelectric detector to obtain first optical power of the optical signal; accessing the optical signal to a to-be-measured optical channel, transmitting the optical signal through the optical channel, and then accessing the optical signal to a photoelectric detector to obtain second optical power of the optical signal transmitted through the optical channel; and obtaining a difference value between the first optical power and the second optical power to obtain an attenuation result of the optical channel to be measured. The detection system provided by the invention is not influenced by the nonlinearity of the device, and the attenuation value of the optical channel is detected by measuring the change of the optical power before and after the optical power is accessed to the channel. Rapid detection when different optical powers are input is realized, the optical power detection capability is improved, the adaptability to different optical powers is enhanced, and the measurement precision is ensured.

Description

technical field [0001] The invention belongs to the field of laser communication, and in particular relates to an optical channel attenuation detection system and method with high precision and large dynamic range. Background technique [0002] Compared with radio frequency communication, wireless optical communication has significant advantages such as frequency bandwidth, low cost, rapid deployment, and no need for spectrum licenses. Laser transmission in wireless channels is susceptible to atmospheric turbulence, which leads to changes in the phase of the wavefront and reduces the stability and reliability of the communication link. At present, the domestic understanding of wireless optical communication channels is still incomplete, and there is no relevant standard for wireless optical communication channel parameter testing, and there is no reference standard for a specific effect test. Therefore, wireless optical communication terminals based on various bearing platf...

AI Technical Summary

Problems solved by technology

Laser transmission in wireless channels is easily affected by atmospheric turbulence, which leads to changes in the wavefront phase and reduces the stability and reliability of the communication link

At present, the domestic understanding of wireless optical communication channels is still not complete, and there is no relevant standard for wireless optical communication channel parameter testing, and there is no reference standard for the specific test of a certain effect

Therefore, wireless optical communication terminals based on various bearer platforms have not yet achieved large-scale engineering applications

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