OCLARO - San Jose since Jul 2012
Principal Engineer
Opnext - San Jose Jan 2009 - Dec 2012
Senior Optical Design Engineer
Stratalight Communications Nov 2007 - Jan 2009
Engineer
Finisar Nov 2005 - Nov 2007
Product Engineer
Big Bear Networks Dec 2000 - Nov 2005
Optical Design Engineer
Education:
Dublin City University 1995 - 1998
MSc, Center for Laser Plasma Research
Dublin City University 1991 - 1995
BSc, Applied Physics with Electronics
Sunil Kumar Singh Khatana - Sunnyvale CA, US Lee Dardis - San Jose CA, US
Assignee:
OPNEXT SUBSYSTEMS, INC. - Los Gatos CA
International Classification:
H04L 27/20
US Classification:
375308
Abstract:
I/Q data skew in a QPSK modulator may be detected by sending identical or complementary data streams to I and Q channel PSK modulators, setting the relative carrier phase between I and Q to zero or π, and monitoring the average QPSK output power, where the data streams sent to the I and Q channels include streams of alternating ones and zeroes.
A method for determining, by a modulator assembly, an optimal drive point for a Mach-Zehnder modulator (MZM). The modulator assembly applies an electrical modulation signal to the MZM to modulate an optical input signal and create a modulated optical output signal, the modulated optical output having a spectrum that includes a first and third harmonic. The modulator assembly measures the difference in magnitude between the first harmonic and the third harmonic as the amplitude of the electrical modulation signal is varied, and determines a value for the amplitude of the electrical modulation signal that corresponds to a maximum difference between the first harmonic and the third harmonic.
Name / Title
Company / Classification
Phones & Addresses
Lee Dardis Engineer
Opnext Subsystems, Inc. Accounting · Mfg Telephone/Telegraph Apparatus
151 Albright Way, Los Gatos, CA 95032 1830 Bering Dr, San Jose, CA 95112 4089616250