to maintain the constant average optical power and extiction ratio, the temperature compensation loop and automatic power control loop are incorporated in this chip.
为了保持工作中的稳定平均输出功率和恒定消光比,采用了温度补偿电路和自动功率控制电路。
but to perfect the system performance , some accessorial circuits are necessary , such as automatic power control circuit , automatic temperature control circuit and protective circuit etc .
an economical and practical laser diode (ld) driver was designed. the driver adopted two kinds of control modes which are automatic current control (acc) and automatic power control (apc).