| 摘要 |
<p>IMPROVEMENTS IN INJECTION LASER OPERATION Compensation for variation in lasing threshold caused by temperature change, laser aging and other degrading phenomena is based on utilization of the rectifying property of semiconductor lasers near threshold. A laser is modulated by a small sinusoidal test signal. According to the monitored position of a critical point of a preselected generated optical harmonic of the test signal fundamental frequency, laser bias current is adjusted to restore the laser threshold position; in addition laser output at the fundamental frequency is used to preserve constant power output if the slope efficiency of the laser alters. - i</p> |
