Sponsor
Portland State University. Department of Electrical Engineering
First Advisor
Lee W. Casperson
Term of Graduation
Fall 1989
Date of Publication
12-7-1989
Document Type
Thesis
Degree Name
Master of Science (M.S.) in Electrical Engineering
Department
Electrical Engineering
Language
English
Subjects
Polarization (Light), Laser communication systems, Liquid crystals -- Optical properties, Algorithms, Fiber optics, Computer algorithms
DOI
10.15760/etd.6029
Physical Description
1 online resource (v, 43 pages)
Abstract
One of the obstacles to coherent fiber-optic communications is the unpredictable polarization drift which necessitates the use of an active polarization controlling system to match the polarizations of the signal and local oscillator. The polarization match must be maintained during the reset of any of the finite range components to prevent loss of data. We present a novel and practical system which uses three liquid crystal devices for the polarization matching process. Also, the required reset control algorithm and its derivation are described in detail.
Rights
In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
Persistent Identifier
https://archives.pdx.edu/ds/psu/23814
Recommended Citation
Rumbaugh, Scott H., "Endless State-of-Polarization Control for Coherent Optical Communication Systems Using Nematic Liquid Crystal" (1989). Dissertations and Theses. Paper 4145.
https://doi.org/10.15760/etd.6029
Comments
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