A Frequency Configuration Method for Photodetector Frequency Response Measurement

Abstract

The invention relates to a frequency configuration method for frequency response measurement of a photodetector. The invention includes an optical frequency comb generation module, a dual-drive intensity modulation module, a photodetector to be tested, a spectrum analysis and data processing module connected in sequence, and a signal source 1 and a signal source 2 connected to the driving electrodes of the dual-drive intensity modulation module The optical frequency comb signal that the optical frequency comb generation module produces is simultaneously modulated by signal source 1 and signal source 2 in the double-drive intensity modulation module, and the present invention realizes the treatment by configuring the repetition frequency of the optical frequency comb generation module and the frequency of the two signal sources Segmental measurement and inter-segment splicing of the frequency response of the photodetector, and the measurement of the frequency response of the photodetector in an ultra-wide frequency range is realized with the help of low-frequency microwave drive.

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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