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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.:

US 10425164 B1

PDFFull Text
Date of Patent:
Sep. 24, 2019

Filed:

Sep. 28, 2018

Off quadrature mach-zehnder modulator biasing

Applicant:

Inphi Corporation, Santa Clara, CA (US);

Inventors:

Todd Rope, Santa Clara, CA (US);

Radhakrishnan L. Nagarajan, Santa Clara, CA (US);

Hari Shankar, Santa Clara, CA (US);

Assignee:

INPHI CORPORATION, Santa Clara, CA (US);

Attorneys:

Richard T. Ogawa

Ogawa P.C.

Primary Examiner:

Jerry M Blevins

Int. Cl.
CPC ...
H04B 10/516 (2013.01); G02F 1/01 (2006.01); G02F 1/225 (2006.01); H01S 5/0687 (2006.01); H01S 5/40 (2006.01); H04B 10/50 (2013.01); H01S 5/14 (2006.01); H04J 14/02 (2006.01); H04B 10/556 (2013.01); G02F 1/025 (2006.01); H01S 3/067 (2006.01); H01S 5/00 (2006.01); G02F 1/21 (2006.01);
U.S. Cl.
CPC ...
H04B 10/516 (2013.01); G02F 1/0123 (2013.01); G02F 1/225 (2013.01); G02F 1/2255 (2013.01); H01S 5/0687 (2013.01); H01S 5/142 (2013.01); H01S 5/4012 (2013.01); H04B 10/505 (2013.01); H04B 10/50575 (2013.01); H04B 10/5561 (2013.01); H04J 14/02 (2013.01); G02F 1/0147 (2013.01); G02F 1/025 (2013.01); G02F 2001/212 (2013.01); G02F 2202/105 (2013.01); H01S 3/06754 (2013.01); H01S 5/0085 (2013.01);
Abstract

The present invention relates to telecommunication techniques and integrated circuit (IC) devices. More specifically, embodiments of the present invention provide an off-quadrature modulation system. Once an off-quadrature modulation position is determined, a ratio between DC power transfer amplitude and dither tone amplitude for a modulator is as a control loop target to stabilize off-quadrature modulation. DC power transfer amplitude is obtained by measuring and sampling the output of an optical modulator. Dither tone amplitude is obtained by measuring and sampling the modulator output and performing calculation using the optical modulator output values and corresponding dither tone values. There are other embodiments as well.

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