Patent ID: 8399835

Claim:
An optical measurement device, comprising: a detected light pulse output device that receives a pump light pulse from a pump light source, and outputs detected light pulse having the same repetition frequency as the repetition frequency of the pump light pulse; a signal output device that receives the detected light pulse and a probe light pulse from a probe light source, and outputs a signal corresponding to a power of the detected light pulse upon the reception of the probe light pulse; a waveform measurer that measures a waveform of the output from the signal output device by detecting the output from the signal output device for a period from reception of a trigger signal to reception of a next trigger signal; a first photoelectric converter that applies photoelectric conversion to the probe light pulse; a second photoelectric converter that applies photoelectric conversion to the pump light pulse; a first amplifier that amplifies an output from the first photoelectric converter; a second amplifier that amplifies an output from the second photoelectric converter; a trigger signal output device that outputs a cross-correlation of outputs of the first amplifier and the second amplifier as the trigger signal; and a period difference adjuster that adjusts a difference in period between a period T 3 from the output of the probe light pulse from the probe light source until the probe light pulse is fed, as the output from the first amplifier, to the trigger signal output device, and a period T 4 from the output of the pump light pulse from the pump light source until the pump light pulse is fed, as the output from the second amplifier, to the trigger signal output device, wherein the repetition frequency of the detected light pulse and the repetition frequency of the probe light pulse are different from each other.