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. 08, 2024
Filed:
Oct. 16, 2019
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Yusuke Muranaka, Musashino, JP;
Tatsushi Nakahara, Musashino, JP;
Toshikazu Hashimoto, Musashino, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
An optical switch includes 2-input 2-output optical switches connected in a multistage, an optical gate provided at each of N-th optical output ports, a driving circuit for operating the 2-input 2-output optical switch, and a driving circuit for operating the optical gate. The driving circuits for operating the 2-input 2-output optical switches are integrated in the vicinity of a control electrode on a waveguide of the 2-input 2-output optical switch. The driving circuits for operating the optical gates are integrated in the vicinity of a control electrode on a waveguide of the optical gates. The waveguide of the 2-input 2-output optical switch and the waveguide of the optical gate each has a p layer, an i layer, and an n layer sequentially formed on a semi-insulating substrate. The optical switch has a trench reaching the semi-insulating substrate between the 2-input 2-output optical switch and the optical gate.