All-optical switches based on Mach-Zehnder configuration with improved extinction ratios
- 1 January 1997
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 9 (1) , 55-57
- https://doi.org/10.1109/68.554487
Abstract
We study driving conditions to improve the extinction ratios in 2/spl times/2 and 1/spl times/2 all-optical switches based on semiconductor optical amplifiers in Mach-Zehnder configuration. In 2/spl times/2 switches, the optimization of the relative phases of both arms of the interferometer together with the introduction of an optical push-pull lead to enhanced and symmetrical extinctions. In 1/spl times/2 switches, perfect extinctions can theoretically be obtained by adapting the splitting ratios of the input and output couplers to the saturation behavior of the amplifiers.Keywords
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