Patent ID: 7864826
Filing Date: 2011-01-04
Classification: H01S,H04B

Abstract:
1. A method to control an optical transmitter that includes an auto-power control feedback and a detector, said auto-power control feedback being formed by a semiconductor laser diode, a semiconductor photodiode, a controller and a driver, and a detector, said detector sensing an active state and an inactive state of an input burst signal, said method comprising steps of: detecting whether said input burst signal is in said active state or in said in active state by said detector; changing said auto-power control feedback in a second mode when said detector detects a transition of said input burst signal from said active state to said inactive sate, said second mode adjusting only a bias current to be supplied to said laser diode through said driver such that an optical output power from said laser diode to be kept in a preset value; and changing said auto-power control feedback in a first mode when said detector detects another transition of said input burst signal from said inactive state to said active state, said first mode adjusting said bias current and a modulation current to be supplied to said laser diode through said driver such that said optical output power from said laser diode to be kept in another preset value.