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:
Aug. 01, 2006
Filed:
Dec. 03, 2003
Takayuki Mizuno, Yamato, JP;
Tsutomu Kitoh, Atsugi, JP;
Manabu Oguma, Yamato, JP;
Yasuyuki Inoue, Isehara, JP;
Takayuki Mizuno, Yamato, JP;
Tsutomu Kitoh, Atsugi, JP;
Manabu Oguma, Yamato, JP;
Yasuyuki Inoue, Isehara, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
An optical multi/demultiplexing circuit includes at least one phase generating optical coupler and an optical delay line coupled to the phase generating optical coupler. The phase generating optical coupler consists of at least one input and at least two outputs. At least one of the phase generating optical coupler has a wavelength dependent or frequency dependent output phase difference in the passband of the circuit so that it can change the transmittance characteristics of the optical multi/demultiplexing circuit.