Power consumption measurement circuit and method for optical module

Abstract

The invention relates to the field of optical communication, and discloses a power consumption measurement circuit and method for an optical module. The power consumption measurement circuit comprisesa current sampling resistor, a differential amplifier, a voltage sampling resistor, a first sampling unit, a second sampling unit and a power consumption calculation unit; the two ends of the currentsampling resistor are connected to an external power supply and the measured optical module respectively; the two input ends of the differential amplifier are connected to the two ends of the currentsampling resistor respectively, and the output end of the differential amplifier is connected to the input end of the first sampling unit; the first end of the voltage sampling resistor is connectedto the second end of the current sampling resistor, and the second end of the voltage sampling resistor is connected to the input end of the second sampling unit; the output end of the first samplingunit and the output end of the second sampling unit are connected to the power consumption calculation module; and the power consumption calculation module is used for calculating the power consumption of the measured optical module according to sampling values of the first sampling unit and the second sampling unit. According to the power consumption measurement circuit and method, the power consumption measurement precision is high and can reach + / -3%, and the measurement range is wide.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to a power consumption measurement circuit and method of an optical module. Background technique [0002] The optical module is composed of optoelectronic devices, functional circuits and optical interfaces. The optoelectronic devices include two parts: transmitting and receiving. The transmitting part is: the electric signal of a certain code rate is input and processed by the internal driver chip to drive the semiconductor laser or the light-emitting diode to emit the modulated optical signal of the corresponding rate. It has an automatic optical power control circuit inside to keep the output optical signal power. Stablize. The receiving part is: an optical signal with a certain code rate is input into the module and then converted into an electrical signal by a light detection diode. After the preamplifier, the electrical signal of the corresponding code rate is ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a power consumption measurement circuit and method of an optical module, which overcomes the defect of low measurement accuracy existing in the existing estimation measurement method

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