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:
May. 01, 2001
Filed:
Jul. 30, 1998
Kenichi Yoneyama, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A light timing pulses generating method comprises the steps of making a non-return-to-zero (NZR) light signal diverge into two route, forming different-length optical paths for carrying two rays diverged from the light signal separately, combining these diverged rays, and generating light timing pulses by inputting the composite light to a mode locking semiconductor laser. A light timing circuit comprises a Mach-Zehnder-type optical circuit including a light divergent section, optical waveguides of different lengths, through which two rays diverged from the incident light are propagated separately, and light combining section; and a synchronous light pulses generating circuit to which the light output from the optical circuit is input. The light timing circuit may include means for monitoring and controlling the interference condition of a Mach-Zehnder interferometer.