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Optical Engineering

Dynamic range and switching speed of an optical switch matrix based on cascaded semiconductor optical amplifier gates with holding-light injection
Author(s): Wei Hong; Dexiu Huang; Xinliang Zhang; Guangxi Zhu
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Paper Abstract

The input power dynamic range and switching speed of an optical switch matrix based on cascaded semiconductor optical amplifier (SOA) gates with holding-light injection were studied numerically using the carrier-density rate equation of the SOA and a dynamic bit-error-rate calculation method. It is shown that holding-light injection can effectively extend the input power dynamic range to high signal input powers, on account of the suppression of the patterning effect in the presence of holding light. Moreover, cascaded SOA gates tend to provide a more linear output-input relation with holding-light injection. A useful by-product of holding-light injection is the enhanced switching speed of the SOA. The switch-on time with holding light is always shorter than that without, owing to a shorter carrier lifetime in the presence of holding light.

Paper Details

Date Published: 1 April 2007
PDF: 10 pages
Opt. Eng. 46(4) 045002 doi: 10.1117/1.2720516
Published in: Optical Engineering Volume 46, Issue 4
Show Author Affiliations
Wei Hong, Huazhong Univ. of Science and Technology (China)
Dexiu Huang, Huazhong Univ. of Science and Technology (China)
Xinliang Zhang, Huazhong Univ. of Science and Technology (China)
Guangxi Zhu, Huazhong Univ. of Science and Technology (China)


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