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Optical Engineering

Polarization diversity scheme on spectral polarization coding optical code-division multiple-access network
Author(s): Chih-Ta Yen; Jen-Fa Huang; Yao-Tang Chang; Bo-Hau Chen
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Paper Abstract

We present an experiment demonstrating the spectral-polarization coding optical code-division multiple-access system introduced with a nonideal state of polarization (SOP) matching conditions. In the proposed system, the encoding and double balanced-detection processes are implemented using a polarization-diversity scheme. Because of the quasiorthogonality of Hadamard codes combining with array waveguide grating routers and a polarization beam splitter, the proposed codec pair can encode-decode multiple code words of Hadamard code while retaining the ability for multiple-access interference cancellation. The experimental results demonstrate that when the system is maintained with an orthogonal SOP for each user, an effective reduction in the phase-induced intensity noise is obtained. The analytical SNR values are found to overstate the experimental results by around 2 dB when the received effective power is large. This is mainly limited by insertion losses of components and a nonflattened optical light source. Furthermore, the matching conditions can be improved by decreasing nonideal influences.

Paper Details

Date Published: 1 December 2010
PDF: 9 pages
Opt. Eng. 49(12) 125005 doi: 10.1117/1.3526335
Published in: Optical Engineering Volume 49, Issue 12
Show Author Affiliations
Chih-Ta Yen, National Formosa Univ. (Taiwan)
Jen-Fa Huang, National Cheng Kung Univ. (Taiwan)
Yao-Tang Chang, Kao Yuan Univ. (Taiwan)
Bo-Hau Chen, National Cheng Kung Univ. (Taiwan)


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