Measuring method and system for frequency response of electro-optical modulator
An electro-optic modulator and frequency response technology, applied in the direction of frequency measurement devices, etc., can solve the problems that the frequency response of the phase modulator cannot be measured, it is complicated and difficult to implement, and the matching requirements are relatively high, so as to achieve high test efficiency, good stability, and line The effect of simple structure
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[0034] Such as figure 2 As shown, an embodiment of the electro-optic modulator frequency response measurement system of the present invention. The system includes: light source, microwave source, vector network analyzer, bias point controller, Mach-Zehnder modulator, 40GHz phase modulator to be tested, photodetector, Brillouin gain medium, optical amplifier, optical isolator , optical beam splitter, optical circulator and control and data processing unit. In this embodiment, a vector network analyzer is selected, which has the functions of the microwave source 2 and the amplitude and phase receiver at the same time. The specific implementation idea is to use an optical beam splitter to divide the optical carrier signal output by the laser into upper and lower channels. The upper channel uses a Mach-Zehnder modulator to modulate the microwave signal output by the microwave source to the optical carrier, supplemented by an appropriate DC bias. Generate a double sideband signa...
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