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:
Nov. 10, 2026
Filed:
Jul. 18, 2024
Fujitsu Optical Components Limited, Kawasaki, JP;
Masaki Sugiyama, Kawasaki, JP;
FUJITSU OPTICAL COMPONENTS LIMITED, Kawasaki, JP;
Abstract
A 90-degree hybrid circuit includes a first and a second waveguide in each of which signal light split by a first coupler propagates. The circuit includes a third and a fourth waveguide in each of which local oscillator light split by a second coupler propagates, and a third coupler that multiplexes the signal light propagated through the first waveguide and the local oscillator light propagated through the third waveguide. The circuit includes a fourth coupler that multiplexes the signal light propagated through the second waveguide and the local oscillator light propagated through the fourth waveguide, and a phase adjustor that adjusts a phase of light propagating through at least one waveguide from among the first to the fourth waveguides. A first total value of optical lengths of the first and the fourth waveguide is shorter than a second total value of optical lengths of the second and the third waveguide.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile