Wavelength-coding-technology-based frequency response testing device for photoelectric detector, and testing method thereof

Abstract

The invention provides a wavelength-coding-technology-based frequency response testing device for a photoelectric detector. The wavelength-coding-technology-based frequency response testing device comprises an optical wavelength coding generator, an optical isolator, an optical fiber coupler, an optical delay line, an optical polarization controller, a photoelectric detector to be detected, and a beat frequency signal detector, wherein an input end of the optical isolator is connected with an output end of the optical wavelength coding generator; a port (1) of the optical fiber coupler is connected with an output end of the optical isolator; one end of the optical delay line is connected with a port (2) of the optical fiber coupler; one end of the optical polarization controller is connected with the other end of the optical delay line; the other end of the optical polarization controller is connected with a port (4) of the optical fiber coupler; an input end of the photoelectric detector to be detected is connected with a port (3) of the optical fiber coupler; and an input end of the beat frequency signal detector is connected with an output end of the photoelectric detector to be detected. The wavelength-coding-technology-based frequency response testing device for a photoelectric detector can quickly and visually acquire the frequency response for the photoelectric detector.

Description

technical field [0001] The invention relates to the technical field of photoelectric instrument measurement, in particular to a test method for measuring the frequency response of a photoelectric detector by a test device based on wavelength coding technology. Background technique [0002] With the rapid popularization of Internet technology, people's demand for information has exploded. In the high-speed, large-capacity information network system, optical fiber communication technology has become one of the main pillars of modern communication due to its unique and incomparable advantages in bandwidth and transmission distance, and plays an important role in modern telecommunication networks. pivotal role. Photodetectors are key devices in optical fiber communication systems, and it is very important to improve the test level of frequency response characteristics of photodetectors for the design and application of optical fiber communication systems. At present, there are...

AI Technical Summary

Problems solved by technology

That is, intensity noise technology, which is simple and quick, and has a wide measurement range. The main problem is that the test dynamic range is small, the signal-to-noise ratio is not high, and the continuous spectrum is easy to saturate the detector, and the efficiency is very low;

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