Patent ID: 6539036
Filing Date: 2003-03-25
Classification: G11B,H01S

Abstract:
Method for controlling a laser control loop to provide automatic adaptation to a polarity of a monitoring signal, comprising the steps of:receiving a monitoring signal during a starting phase of the laser control loop, the starting phase including a period from the application of a supply voltage to a driver of a laser to when light power of the laser is to be controlled; comparing the monitoring signal with a second reference value in a second comparator; providing either the monitoring signal or an inverted monitoring signal to a first comparator in response to the output of the second comparator; and comparing the monitoring signal or the inverted monitoring signal with a first reference value in the first comparator and controlling the light power of the laser in response to the output of the first comparator for automatically adapting the laser control loop to the monitoring signal polarity during the starting phase of the laser control loop.