Patent ID: 8554072
Filing Date: 2013-10-08
Classification: H04B

Abstract:
1. An optical transceiver comprising: a plurality of transmitter units each installing a semiconductor laser diode and a bias current source, said semiconductor laser diode being provided with a bias current from said bias current source; an optical multiplexer configured to multiplex optical signals output from respective transmitter units; a monitor photodiode configured to monitor an optical output of said optical transceiver, and a controller to control said optical output, wherein said controller selects one of transmitter units that has a margin of said bias current widest to a predetermined upper limit or a predetermined lower limit when said controller receives information from said monitor photodiode to increase or decrease said optical output, and provides a control signal to said bias current source in said one of transmitter units, and wherein said bias current source in said one of transmitter units increases or decreases said bias current by a preset step.