System and method for programmable polarization-independent phase compensation of optical signals

a phase compensation and optical signal technology, applied in the field of optical communication and the processing of optical signals, to achieve the effect of correcting, reducing or otherwise adjusting the chromatic dispersion of optical signals
US20050270616A1Inactive Publication Date: 2005-12-08PURDUE RES FOUND INC
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
PURDUE RES FOUND INC
Publication Date
2005-12-08
Estimated Expiration
Not applicable · inactive patent

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Abstract

A system and method for programmable phase compensation of optical signals is disclosed. The systems and methods include the use of a polarization-independent spatial light modulator (PI-SLM) so that the state of polarization (SOP) of the incoming optical signal need not be known. The system includes a first dispersive module that spatially separates the optical signal into its frequency components. The frequency components are spread over the active area of the PI-SLM. The active area of the PI-SLM includes an array of independently programmable addressable regions capable of altering the phase of the light incident thereon. An exemplary application of the invention is chromatic dispersion compensation. By knowing the amount of chromatic dispersion in the optical signal, or alternatively, by knowing the amount of chromatic dispersion to be introduced into the optical signal downstream, the appropriate phase adjustments can be made to each frequency component of the signal. The phase-adjusted frequency components are then recombined via a second dispersive module to form a compensated optical signal.
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Description

CROSS-REFERENCE TO RELATED APPLICATION

[0001] This application is a divisional under 37 CFR 1.53(b) of U.S. application Ser. No. 10 / 178,949 filed Jun. 24, 2002, which claims the benefit under 35 U.S.C. 119(e) of U.S. Provisional Application Ser. No. 60 / 303,763 filed Jul. 6, 2001, which applications are incorporated herein by reference.FIELD OF THE INVENTION

[0002] The present invention relates to optical communications and the processing of optical signals, and in particular relates to systems and methods for adjusting the phase of optical signals having an arbitrary polarization. BACKGROUND OF THE INVENTION

[0003] The transmission of information over optical fibers is becoming pervasive. This is motivated, at least in part, because optical fiber offers much larger bandwidths than electrical cable. Moreover, optical fiber can connect nodes over large distances and transmit optical information between such nodes at the speed of light.

[0004] There are, however, a number of physical e...

Claims

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