| 摘要 |
PROBLEM TO BE SOLVED: To output quietly the power of a laser module without being affected by environment and temperature. SOLUTION: A power control apparatus contains one feedback unit 12, one digital control unit 14 and one drive unit 16. The feedback unit 12 of them detects the power output of the laser module, and outputs a detection signal correspondingly. The digital control unit 14 compares the detection signal with a work parameter signal which is found through a contrast table and possesses a temperature compensation effect, and outputs one drive signal to the drive unit 16 based on the compared result. The drive unit 16 controls the drive current of the laser module, based on the drive signal. COPYRIGHT: (C)2007,JPO&INPIT |
