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. 30, 2026
Filed:
Dec. 07, 2023
Gigaphoton Inc., Tochigi, JP;
Atsushi Fuchimukai, Oyama, JP;
Gigaphoton Inc., Tochigi, JP;
Abstract
An ultraviolet laser device includes an oscillation stage laser outputting linearly polarized pulse laser light having an ultraviolet wavelength, an optical isolator arranged on an optical path between the oscillation stage laser and an amplifier, and a processor. The optical isolator includes a first polarizer, a first Faraday rotator rotating a polarization direction of the pulse laser light transmitted through the first polarizer in a first rotation direction, a second polarizer arranged so that the pulse laser light output from the first Faraday rotator is transmitted therethrough, a first actuator relatively moving the first magnet and the first Faraday material in an optical axis direction, and a first sensor measuring a power of pulse laser light reflected by the second polarizer among the pulse laser light output from the oscillation stage laser. The processor controls the first actuator based on a measurement result of the first sensor.