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:
May. 24, 2005
Filed:
Mar. 15, 2002
Jill D. Berger, Los Gatos, CA (US);
Subrata K. Dutta, San Jose, CA (US);
Alan A. Fennema, San Jose, CA (US);
Olga A. Gorbounova, Fremont, CA (US);
Stephen J. Hrinya, San Jose, CA (US);
Fedor A. Ilkov, Sunnyvale, CA (US);
David A. King, Menlo Park, CA (US);
Heather L. Tavernier, Mountain View, CA (US);
Alexander A. Tselikov, Fremont, CA (US);
Jill D. Berger, Los Gatos, CA (US);
Subrata K. Dutta, San Jose, CA (US);
Alan A. Fennema, San Jose, CA (US);
Olga A. Gorbounova, Fremont, CA (US);
Stephen J. Hrinya, San Jose, CA (US);
Fedor A. Ilkov, Sunnyvale, CA (US);
David A. King, Menlo Park, CA (US);
Heather L. Tavernier, Mountain View, CA (US);
Alexander A. Tselikov, Fremont, CA (US);
Iolon, Inc., San Jose, CA (US);
Abstract
An apparatus comprising a first reference element having an output power that varies monotonically with input frequency over an operating frequency range and receiving at least a portion of an output beam of light from an optical source. A second reference element having an output power that is frequency dependent receives at least a portion of the output beam of light. A first optical detector measures the power of a first reference beam of light from the first reference element. A second optical detector measures the power of a second reference beam of light from the second reference element. Electronic circuitry is coupled to the first and second optical detectors for receiving first and second reference signals therefrom and producing a coarse error signal for permitting coarse adjustment and a fine error signal for permitting fine adjustment of the frequency of the output beam of light.