HFAN-09.2.0: 在PON突发模式激光驱动器中利用热敏电阻补偿温度引起的效率变化

HFAN-09.2.0: 在PON突发模式激光驱动器中利用热敏电阻补偿温度引起的效率变化

2006-11-14

343.00K

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摘要

任何无源光网络(PON)系统的光网络终端(ONT)都需采用突发模式激光二极管驱动器。激光驱动电路必须能够迅速打开激光二极管，调制激光器发送突发数据，然后迅速关闭以便其它用户发送数据。由于ONT可能会安装在大楼外面，必须能够可靠工作在-40°C至+85°C温度范围。目前已经出现了几种商用集成电路突发模式激光器驱动器。大多数情况下，这些突发模式激光驱动器包括高效闭环温度补偿电路，用于补偿温度和老化导致的激光二极管阈值电流变化。然而，这些产品一般没有从内部采取措施，只是改变输出调制电流来补偿温度导致的激光二极管效率变化。

343.00K
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