Method and apparatus for extracting optical clock signal

Details Method and apparatus for extracting optical clock signal Method and apparatus for extracting optical clock signal

2006-10-12

2009-08-25

Vanderpuye, Ken N (Department: 2613)

Optical communications

Transmitter and receiver system

Including synchronization

C398S160000, C359S325000, C359S341200, C359S490020, C359S515000

Reexamination Certificate

active

07580640

ABSTRACT:
An apparatus and method for extracting an optical clock signal are provided. The method includes splitting a predetermined polarization component from an input optical signal, selecting frequency components for clock signal extraction from the predetermined polarization component and amplifying the selected frequency components, rotating the amplified frequency components by a predetermined angle and then reflecting them, amplifying the reflected frequency components and removing noise from the amplified frequency components using a Fabry-Perot filter, and obtaining a beat frequency component from the frequency components from which noise has been removed using the Fabry-Perot filter to extract a clock signal. Accordingly, influence of the pattern of the input optical signal is reduced and the apparatus and method are provided at low price.

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patent: 2004/0109639 (2004-06-01), Lee et al.
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patent: 2006/0233555 (2006-10-01), Lee et al.
patent: 2006/0280506 (2006-12-01), Lee et al.
patent: 2007/0053691 (2007-03-01), Von Lerber
patent: 08-191268 (1996-07-01), None
patent: 2003-0032012 (2003-04-01), None

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