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:
Feb. 19, 2002
Filed:
Oct. 05, 2000
Yawen Yang, Newark, CA (US);
Suyou He, Fremont, CA (US);
Tera Fiberoptics, Inc, Fremont, CA (US);
Abstract
System and method for wavelength discrimination using a DWDM cascade tree structure with distributed filtering to provide acceptable optical isolation and acceptable flat-top wavelength response. Each channel has a Mach-Zehnder interferometer (MZI), or an MZI combined with a phase shift mechanism (a PSMZI), that provides wavelength discrimination in each channel of the structure. The phase shift mechanism may be a Gires-Tournois resonator, selectively tuned for each channel. The number of output channels may be 32, 64, 128 or more, and the light in each output channel satisfies the BellCore standards for optical isolation, flat-top wavelength response and crosstalk suppression.