公开(公告)号：US20250105576A1

公开(公告)日：2025-03-27

申请号：US18797561

申请日：2024-08-08

Applicant: Gigaphoton Inc.

Inventor： Masanori YASHIRO ,  Ryouta KUJIRA

IPC: H01S3/00 ,  H01S3/034

Abstract: An optical pulse stretcher includes a beam splitter separating laser light incident on an optical surface thereof into reflection laser light and transmission laser light, a holder fixing the beam splitter with the optical surface of the beam splitter inclined with respect to an optical path axis of the incident laser light, mirrors guiding the reflection laser light to the beam splitter, and a slide mechanism moving the beam splitter in a direction parallel to the optical surface. The slide mechanism includes a slide plate to which the holder is coupled, and a case which holds the slide plate in a movable manner in a slide direction with respect to a base plate on which the mirrors are arranged. The case includes a threaded hole having an internal thread formed on an inner circumference thereof. The slide plate includes a through hole at a position corresponding to the threaded hole.

公开(公告)号：US20250070526A1

公开(公告)日：2025-02-27

申请号：US18938048

申请日：2024-11-05

Applicant: Gigaphoton Inc.

Inventor： Masanori YASHIRO ,  Hitoshi OHGA ,  Ryouta KUJIRA

IPC: H01S3/00 ,  H01S3/03

Abstract: A line narrowing module includes a mirror including a bottom surface and a reflection surface of light; a grating configured to wavelength-disperse the light reflected by the reflection surface; a base plate to which the bottom surface of the mirror is fixed with an adhesive; a rotation stage configured to rotate the base plate, arranged thereon, about a rotation axis perpendicular to a plane in which the light is wavelength-dispersed to rotate the mirror about the rotation axis; and a drive unit configured to rotate the rotation stage about the rotation axis. A centroid of the mirror, a centroid of the adhesive, a centroid of the base plate, and a centroid of the rotation stage are located on the rotation axis.