Patent ID: 11909164
Assignee: NATIONAL UNIVERSITY CORPORATION TOKYO UNIVERSITY OF AGRICULTURE AND TECHNOLOGY
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 7:
8. The light detection device of claim 7, wherein:
the first shaping section includes a wavelength scanning section configured to scan the wavelength difference, the wavelength scanning section including a first bandpass filter having a bandwidth corresponding to the target time waveform of the one pulse beam and rotatable in a direction intersecting a propagation direction of the first pulse beam, and further including a delay member configured to impart a variable time delay to the one pulse beam; and
the light detection device further comprises a control section configured to control the wavelength scanning section so as to set the wavelength difference by using a rotation angle of the first bandpass filter and to compensate a time difference between the first probe pulse beam and the second probe pulse beam accompanying rotation of the first bandpass filter by using the time delay of the delay member, and further configured to control the modulation section so as to perform phase modulation with a modulation signal having a saw-tooth waveform including regions of linear change in phase for the second probe pulse beam transmitted through a second bandpass filter having a bandwidth corresponding to the target time waveform and including connection regions at which there is a steep change of phase difference 2π.