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:
Jun. 26, 2007
Filed:
Jan. 22, 2004
Applicants:
Steve Wang, San Jose, CA (US);
Xuejun LU, Fremont, CA (US);
Frank Levinson, San Jose, CA (US);
Inventors:
Assignee:
Finisar Corporation, Sunnyvale, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 31/0232 (2006.01);
U.S. Cl.
CPC ...
Abstract
A variable optical attenuator. A PIN structure is integrated with an optical detector such as a PIN diode or an APD diode. When the PIN structure is forward biased, the light signal is not affected and is detected by the optical detector. When the PIN structure is reverse biased, the light signal is attenuated and the dynamic range of the optical detector can be increased.