公开(公告)号：US06792013B2

公开(公告)日：2004-09-14

申请号：US09988322

申请日：2001-11-19

申请人： Hiromasa Ishiwata ,  Akihiro Saito

发明人： Hiromasa Ishiwata ,  Akihiro Saito

IPC分类号： H01S300

CPC分类号： H01S5/0683 ,  H01S5/042 ,  H01S5/0617

摘要： An auto laser power control circuit is provided which improves the response of the optical output level of a laser diode in accordance with variations in the operation mode. In an auto laser power control circuit for comparing a voltage corresponding to the optical output from the laser diode which emits a light in accordance with a supplied driving current with a reference voltage, and controlling the driving current so as to reduce the difference at the time of the steady operation, by controlling a switch connected between the input and output terminals of an operational unit which compares the voltage corresponding to the optical output from the laser diode and the reference voltage, the driving current to the laser diode is controlled with a smaller time constant upon the start such as a transition of from a read operation mode to a write operation mode as compared with the time of the steady operation.

摘要翻译： 提供一种自动激光功率控制电路，其根据操作模式的变化提高激光二极管的光输出电平的响应。在用于比较与激光二极管的光输出相对应的电压的自动激光功率控制电路中， 其根据所提供的具有参考电压的驱动电流发射光，并且通过控制连接在操作单元的输入和输出端子之间的开关来控制驱动电流以减小稳定操作时的差异 其比较对应于来自激光二极管的光输出的电压和参考电压，到激光二极管的驱动电流在开始时以较小的时间常数来控制，例如从读操作模式转换到写操作模式 与稳定运行的时间相比。