Patent ID: 8705957

Claim:
An optical line termination, comprising an optical reception component and a processor, wherein a current mirror, a current-voltage conversion circuit and a switch circuit are connected sequentially between the optical reception component and the processor, and a grounded tank circuit is connected between the switch circuit and the processor, and wherein: the optical reception component is configured to receive an optical signal, to generate from the optical signal a response current, and to output the response current; the current-voltage conversion circuit connected with the optical reception component is configured to convert the response current output from the optical reception component to a voltage signal and output the voltage signal; the switch circuit connected with the current-voltage conversion circuit is configured to be closed upon reception of an active trigger control signal at a control terminal thereof to receive the voltage signal output from the current-voltage conversion circuit and to output the voltage signal, wherein the trigger control signal is provided from a system side supervising the optical line termination; the tank circuit connected with the switch circuit is configured to sample and hold the voltage signal output from the switch circuit and to output the voltage signal; and the processor connected respectively with the tank circuit and the switch circuit is configured to supervise an average optical power of the voltage signal output from the tank circuit.