Optical power monitoring device, method, and program

摘要

An optical power monitoring device is provided with: an APD as a photodiode that converts the power of light to a current (Iapd); a resistor that is connected in parallel to the APD; a current mirror circuit that detects, as a first current value (I1), the value corresponding to the sum of the current (Irb) flowing through the resistor and the current (Iapd) flowing through the APD; and a control unit. The control unit stores in advance a value corresponding to the current flowing through the resistor as a second current value (I2), and determines the current (Iapd) flowing through the APD on the basis of the second current value (I2) and the first current value (I1) detected by the current mirror circuit.

主权项

1. An optical power monitoring device, comprising:
a photodiode which converts a received optical power to a current; a resistor connected in parallel to the photodiode;
a current mirror circuit which detects a value corresponding to a sum of a current flowing through the resistor and a current flowing through the photodiode as a first current value; anda control unit which stores in advance a value corresponding to the current flowing through the resistor as a second current value, and acquires the current flowing through the photodiode based on the second current value and the first current value that is detected by the current mirror circuit.