Frequency configuration method for photoelectric detector frequency response measurement

Abstract

The invention relates to a frequency configuration method for photoelectric detector frequency response measurement. According to the method, an optical frequency comb generating module, a double-drive intensity modulation module, a photoelectric detector to be tested, a spectrum analysis and data processing module, a signal source A and a signal source B are adopted, wherein the optical frequencycomb generating module, the double-drive intensity modulation module, the photoelectric detector to be tested and the spectrum analysis and data processing module are connected with one another sequentially, and the signal source A and the signal source B are connected with the driving electrode of the double-drive intensity modulation module; and optical frequency comb signals generated by the optical frequency comb generating module are simultaneously modulated by the signal source A and the signal source B in the double-drive intensity modulation module. According to the frequency configuration method for photoelectric detector frequency response measurement of the invention, the repetitive frequency of the optical comb generating module and the frequencies of the two signal sources are configured, so that the segmental measurement and inter-segment splicing of the frequency response of the photoelectric detector are realized, and ultra-wide-frequency-range photoelectric detector frequency response measurement can be realized by means of low-frequency microwave driving.

Description

technical field [0001] The invention belongs to the measurement technology of characteristic parameters of optoelectronic devices in the field of optoelectronic technology, and in particular relates to a frequency configuration method for frequency response measurement of photodetectors. Background technique [0002] High-speed photodetectors are important components in optical fiber communication systems, optical signal processing links, and ROF systems. The frequency response characteristics of photodetectors during photoelectric conversion are key indicators to measure their performance, and also directly affect optical fiber communication. The transmission, processing and detection capabilities of signals in the system. Accurate measurement of the frequency response of broadband photodetectors plays an important role in optimizing device operating parameters and system performance. [0003] At present, the methods for measuring photodetectors can be divided into all-lig...

AI Technical Summary

Problems solved by technology

The frequency-shift heterodyne method uses a two-tone modulation signal and a frequency-shift signal to beat the frequency, and measures the required sideband amplitude to obtain the frequency response of the photodetector. The measurement result is not affected by the frequency response and bias of the electro-optical conversion device, but Its measurement bandwidth is still limited by the microwave source and the bandwidth of the electro-optical conversion device

From the above methods, it can be seen that the measurement range of the microwave-assisted optical excitation method is limited by the microwave source and the electro-optic conversion device, and it is difficult to achieve broadband measurement.

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