Device and method for performing offset point automatic locking on electrooptical modulator with ultrahigh extinction ratio
An electro-optical modulator and automatic locking technology, applied in the field of optical communication and optical sensing, can solve the problems of feedback system discriminating influence, optical coupler loss, limiting the extinction ratio of output optical pulses, etc. , the effect of stabilizing the working point
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[0042] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
[0043] The invention is a closed-loop control device for bias voltage control of an electro-optic modulator with low duty cycle pulse light modulation. It mainly includes three modules: optical splitting module, electro-optic modulator bias voltage control module, and synchronization module.
[0044] The optical splitting module is mainly an optical switch, and the optical switch required by the device must be a high-speed optical switch with one input and two outputs. The main function of this optical switch is to separate the optical pulse component of the pulsed light modulated by the electro-optic modulator from the optical pulse base component, so that the optical pulse can be stably detected with high energy, and the optical pulse base signal is all biased by the electro-optic modulator. The control system receives the processing. Therefore...
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