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. 24, 2004
Filed:
Feb. 15, 2002
Jyoti Kiron Bhardwaj, Cupertino, CA (US);
Robert James Brainard, Sunnyvale, CA (US);
David J. Chapman, San Jose, CA (US);
Douglas E. Crafts, San Jose, CA (US);
Zi-Wen Dong, Union City, CA (US);
David Dougherty, Sunnyvale, CA (US);
Erik W. Egan, Oakland, CA (US);
James F. Farrell, San Jose, CA (US);
Mark B. Farrelly, San Jose, CA (US);
Niranjan Gopinathan, Santa Clara, CA (US);
Kenzo Ishida, Saratoga, CA (US);
David K. Nakamoto, Sunnyvale, CA (US);
Thomas Thuan Nguyen, San Jose, CA (US);
Suresh Ramalingam, Fremont, CA (US);
Steven M. Swain, San Jose, CA (US);
Sanjay M. Thekdi, Santa Clara, CA (US);
Anantharaman Vaidyanathan, San Jose, CA (US);
Hiroaki Yamada, San Jose, CA (US);
Yingchao Yan, Milpitas, CA (US);
JDS Uniphase Corporation, San Jose, CA (US);
Abstract
A planar lightwave circuit includes an arrayed waveguide grating (AWG), with input and output waveguides, partially curved array waveguides with respective length differences, and planar waveguide regions for focusing optical energy between the input/output and array waveguides. Optimal waveguide widths and spacing along the planar waveguide region facets are disclosed, which are largely determinative of AWG size and optical performance. Also disclosed are optimal cross-sectional waveguide dimensions (e.g., width and height); modified index of refraction difference between the waveguide core and cladding regions; and optimal array waveguide lengths, path length differences, and free spectral range. These features, especially when combined with advanced fiber attachment, passivation and packaging techniques, result in high-yield, high-performance AWGs (both gaussian and flattop versions).