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:
Mar. 29, 2011
Filed:
Nov. 03, 2009
Jeremy Witzens, Seattle, WA (US);
Behnam Analui, Alhambra, CA (US);
Sina Mirsaidi, San Diego, CA (US);
Thiruvikraman Sadagopan, Mountain View, CA (US);
Brian Welch, San Diego, CA (US);
Adithyaram Narasimha, Carlsbad, CA (US);
Jeremy Witzens, Seattle, WA (US);
Behnam Analui, Alhambra, CA (US);
Sina Mirsaidi, San Diego, CA (US);
Thiruvikraman Sadagopan, Mountain View, CA (US);
Brian Welch, San Diego, CA (US);
Adithyaram Narasimha, Carlsbad, CA (US);
Luxtera, Inc., Carlsbad, CA (US);
Abstract
An integrated control system for a laser and Mach-Zehnder interferometer are disclosed and may include configuring a bias point for low-speed control of an optical modulator utilizing control circuitry integrated on the same CMOS die. The optical modulator may be differentially monitored. A laser source for the modulator may be controlled utilizing monitor photodiodes via optical taps on outputs of the modulator, or utilizing a monitor photodiode on one output port of the modulator, which may comprise a Mach-Zehnder interferometer. An error signal may be generated by subtracting monitor photodiode signals from optical taps on output ports of the modulator. The bias point of the modulator may be adjusted by minimizing the error signal. Calibration time of the bias point may be reduced utilizing electronic data inversion. An output of the modulator may comprise a Y-junction and a single monitor photodiode may measure both branches of the modulator.