公开(公告)号：US20240094087A1

公开(公告)日：2024-03-21

申请号：US17768507

申请日：2020-11-19

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Koji TAKAHASHI ,  Ryu NIIGAKI

IPC: G01M11/00

CPC classification number: G01M11/33

Abstract: In a measurement method, light inputs with the same center wavelength and different properties are performed on a light transmission medium, and a measured value of an intensity spectrum of each of light outputs is acquired. An error between the measured value and an estimated value of the intensity spectrum calculated based on a theoretical relation between an intensity spectrum and a phase spectrum of each of the light inputs, a nonlinear coefficient and a wavelength dispersion value of the light transmission medium, and the intensity spectrum of each of the light outputs is calculated while changing the nonlinear coefficient and the wavelength dispersion value. Further, the nonlinear coefficient and the wavelength dispersion value are determined based on a difference, in a relation between the nonlinear coefficient and the wavelength dispersion value and the error, between the light inputs.

公开(公告)号：US20250068002A1

公开(公告)日：2025-02-27

申请号：US18721444

申请日：2023-01-11

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Ryu NIIGAKI ,  Koji TAKAHASHI ,  Kyohei SHIGEMATSU

IPC: G02F1/01

Abstract: In a multi-pulse light source, a dispersion compensation unit includes a spectroscopic element configured to spectrally separate a plurality of wavelength components, a separation optical element that guides a first optical pulse group including one or more wavelength components among a plurality of wavelength components, and a second optical pulse group including one or more wavelength components different from the one or more wavelength components included in the first optical pulse group among the plurality of wavelength components to optical paths different from each other, a first spatial light modulator on which the first optical pulse group is incident and which compensates dispersion for each wavelength component with respect to the first optical pulse group, and a second spatial light modulator on which the second optical pulse group is incident and which compensates dispersion for each wavelength component with respect to the second optical pulse group.