Patent ID: 8982451
Filing Date: 2015-03-17
Classification: B82Y,G01N,G01Q,H01J

Abstract:
1. A pump probe measuring device, comprising: an ultrashort optical pulse laser generator that generates a first ultrashort optical pulse train which is a pump light, a second ultrashort optical pulse train which has a first delay time with respect to the pump light, and a third ultrashort optical pulse train which has a second delay time with respect to the pump light, the second and the third ultrashort optical pulse trains constitute a probe light; an optical shutter unit to which the second and the third ultrashort optical pulse trains are introduced, the optical shutter unit emits the second and the third ultrashort optical pulse trains alternately; an optical shutter control unit that controls the optical shutter unit; an irradiation optical system that irradiates a sample with the pump light and the probe light; a sensor that detects a probe signal from the sample; and a phase-sensitive detector connected to the sensor, wherein the irradiation optical system irradiates the sample with the first ultrashort optical pulse train as the pump light; the second and the third ultrashort optical pulse trains are introduced into the optical shutter unit, the optical shutter unit irradiates the sample with the second and the third ultrashort optical pulse trains alternately as the probe light so that a delay time of the probe light with respect to the pump light is modulated periodically; and the probe signal from the sample is detected by the phase sensitive detector in synchronization with the periodic modulation of the delay time.