公开(公告)号：US20230152163A1

公开(公告)日：2023-05-18

申请号：US17915009

申请日：2021-02-16

申请人： MITSUBISHI HEAVY INDUSTRIES, LTD. ,  Institute for Laser Technology

发明人： Koichi HAMAMOTO ,  Tomoya MORIOKA ,  Shingo NISHIKATA ,  Hiroyuki DAIGO ,  Noriaki MIYANAGA

IPC分类号： G01J9/02 ,  G02B5/32 ,  G02B5/30

CPC分类号： G01J9/02 ,  G02B5/32 ,  G02B5/3083 ,  G01J2009/0261

摘要： A phase difference measuring device is provided with a phase conversion device and a detection device. The phase conversion device converts a first laser beam that passes therethrough so that the first laser beam includes a phase distribution of one cycle in an azimuth direction in a cross section of the first laser beam included in an arbitrary virtual plane perpendicular to an optical axis of the first laser beam. The detection device detects an azimuth angle of an intensity centroid of an interference pattern generated by at least a part of a first laser beam that has passed through the phase conversion device, and a part of a second laser beam that derives from a laser beam as seed light from which the first laser beam derives, of which an optical intensity is same as the at least a part of the first laser beam, and detects an inter-beam phase difference of the second laser beam.

公开(公告)号：US20220283354A1

公开(公告)日：2022-09-08

申请号：US17628397

申请日：2020-06-22

申请人： Institute for Laser Technology ,  Panasonic Corporation

发明人： Takanori AKETA ,  Kenichiro TANAKA ,  Noriaki MIYANAGA

IPC分类号： F21V8/00

摘要： A light-emitting device includes an optical fiber, a first light source unit, and a second light source unit. The optical fiber includes a wavelength converting portion. The wavelength converting portion is provided between a light incident portion and a light emerging portion. The wavelength converting portion contains a wavelength converting material. The wavelength converting material is excited by excitation light to produce a spontaneous emission of light having a longer wavelength than the excitation light and amplifies the spontaneous emission of light to produce an amplified spontaneous emission of light. The first light source unit makes the excitation light incident on the light incident portion. The second light source unit makes seed light, causing a stimulated emission of light to be produced from the wavelength converting material that has been excited by either the excitation light or the amplified spontaneous emission of light, incident on the light incident portion.