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:
Apr. 25, 2006
Filed:
Jul. 22, 2004
Jinxi Shen, San Ramon, CA (US);
Robert R. Mcleod, Boulder, CO (US);
Douglas E. Crafts, San Jose, CA (US);
Barthelemy Fondeur, Mountain View, CA (US);
Yong Ding, Shanghai, CN;
Pang-chen Sun, San Diego, CA (US);
Jinxi Shen, San Ramon, CA (US);
Robert R. McLeod, Boulder, CO (US);
Douglas E. Crafts, San Jose, CA (US);
Barthelemy Fondeur, Mountain View, CA (US);
Yong Ding, Shanghai, CN;
Pang-Chen Sun, San Diego, CA (US);
JDS Uniphase Corporation, San Jose, CA (US);
Abstract
An apparatus for monitoring an input optical signal at a plurality of distinct optical frequencies is disclosed wherein a demultiplexing arrayed waveguide grating (AWG) having a plurality of M>1 Vernier input ports is disposed between an optical switch and a photodiode array coupled to the output ports of the AWG. In operation, the optical switch sequentially provides the input optical signal into each of the Vernier ports, and signals detected by photodiodes are stored in a memory unit. The apparatus is capable of monitoring the input optical signal with a frequency step which is M times smaller than a frequency spacing between the AWG transmission bands, and obtain M frequency-resolved readings from each photodiode.