Feedback control system and method for controlling output light intensity of dual parallel mzm modulators
A feedback control system and feedback control technology, applied in transmission systems, electromagnetic wave transmission systems, electromagnetic transmitters, etc., can solve problems such as changes in working conditions, performance degradation, and drift of modulator output optical power, to achieve constant output power and system The best performance
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[0024] A feedback control system to control the output light intensity of dual parallel MZM modulators, such as figure 1 As shown, it is mainly composed of fiber coupler, light receiving component, A / D converter, digital comparator, memory, microprocessor and D / A converter. The input end of the fiber coupler is connected to the output end of the dual parallel MZM modulator, the main output end of the fiber coupler outputs the normal output optical signal of the dual parallel MZM modulator, and the secondary output end outputs the monitoring optical signal of the dual parallel MZM modulator . The input end of the light receiving component is connected with the secondary output end of the fiber coupler, and the output end of the light receiving component is connected with the input end of the A / D converter. The two output terminals of the A / D converter are respectively connected to the input terminal of the digital comparator and the memory, the output terminal of the memory is...
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