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. 30, 2012
Filed:
Jan. 21, 2009
Tomoaki Kato, Tokyo, JP;
Tomoaki Kato, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
Provided is a traveling-wave type semiconductor optical phase modulator capable of high speed and low voltage operation by improving an n-SI-i-n-type layered structure. A first exemplary aspect of the present invention is a waveguide-type semiconductor optical modulator including: a semiconductor substrate (); a first n-type cladding layer () and a second n-type cladding layer () formed on the semiconductor substrate (); an undoped optical waveguide core layer () and an electron trapping layer () formed between the first n-type cladding layer () and the second n-type cladding layer (); and a hole supplying layer () formed between the undoped optical waveguide core layer () and the electron trapping layer ().