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:
Oct. 06, 2026
Filed:
May. 27, 2022
Sumitomo Electric Industries, Ltd., Osaka, JP;
Tetsuya Nakanishi, Osaka, JP;
Manabu Shiozaki, Osaka, JP;
Shigehiro Nagano, Osaka, JP;
Hajime Arao, Osaka, JP;
SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka, JP;
Abstract
An optical waveguide manufacturing method according to one embodiment is an optical waveguide manufacturing method by irradiating glass with femtosecond laser beam to form an optical waveguide. The optical waveguide manufacturing method includes a first process of irradiating the glass with the femtosecond laser beam having a pulse width of 300 (fs) or less and a repetition frequency of 700 (kHz) or less while relatively moving the glass and a focal position of the femtosecond laser beam and a second process of irradiating an increased refractive index portion with a femtosecond laser beam having a pulse width of 300 (fs) or less and a repetition frequency higher than 700 (kHz).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile