FIELD: radio engineering, communication.
SUBSTANCE: invention relates to communication engineering and can be used in optical communication systems. Disclosed method of controlling optical power, which includes: monitoring output optical power of an optical source, and judging whether a preset test control signal is received; if the preset test control signal is not received, modulating a data signal to output light of the optical source, and adjusting bias current of the optical source according to an output optical power monitoring result of the optical source; and if the preset test control signal is received, performing a test and superimposing a test signal to the data signal to form a superimposed signal, transmitting the superimposed signal to the output light of the optical source, wherein the output optical power monitoring result of the optical source is ignored during the test period to maintain the bias current of the optical source at a preset target value.
EFFECT: high noise-immunity of transmitting optical information.
17 cl, 4 dwg
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