The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 16, 2026
Filed:
Mar. 14, 2022
Hamamatsu Photonics K.k., Hamamatsu, JP;
HAMAMATSU PHOTONICS K.K., Hamamatsu, JP;
Abstract
A dispersion measurement device includes a pulse forming unit, an optical detection unit, and an arithmetic operation unit. The pulse forming unit includes an SLM that presents a phase pattern giving a predetermined phase shift for each of wavelength to the first optical pulse, and forms an optical pulse train from the first optical pulse, the optical pulse train including a plurality of second optical pulses having a time difference from each other and having center wavelengths different from each other. The optical detection unit detects a temporal waveform of the optical pulse train. The arithmetic operation unit is electrically connected to the optical detection unit. An optical component is arranged on an optical path between the pulse forming unit and the optical detection unit. The arithmetic operation unit estimates a wavelength dispersion amount of the optical component based on a feature amount of the temporal waveform. The phase pattern of the SLM includes a pattern for giving a group delay dispersion having a sign opposite to the group delay dispersion of the optical component to the first optical pulse.