但是，虽然光信号比电信号在信息传输上高效很多，却也更难控制。
But while optical signals transmit information much more efficiently than electrical signals, they're harder to control.
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。
To maintain the constant average optical power and extiction ratio, the temperature compensation loop and automatic power control loop are incorporated in this chip.
偏振控制器要求有快的响应速度，大的消光比，小的波动，并能无端复位或不需复位就可进行无端偏振态控制。
It requires fast response speed, big extinction ratio, small fluctuation with endless reset or reset-free SOP control.
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