Method and apparatus for controlling a bias voltage of a...

Details Method and apparatus for controlling a bias voltage of a... Method and apparatus for controlling a bias voltage of a...

2006-07-11

2006-07-11

Schwartz, Jordan M. (Department: 2873)

Optical: systems and elements

Optical modulator

Light wave temporal modulation

C359S246000, C359S240000

Reexamination Certificate

active

07075695

ABSTRACT:
A method and apparatus for controlling a bias voltage of a Mach-Zehnder modulator (MZM) use a digital pilot signal and a digital correlation technique to produce a feedback signal for adjusting the bias voltage to the quadrature bias point. Embodiments of the invention include apparatuses performing a non-return-to-zero (NRZ), return-to-zero (RZ), or carrier suppressed RZ (CSRZ) high-speed optical modulation.

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patent: 05 25 0876 (2005-05-01), None
patent: 2 830 088 (2003-03-01), None

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