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A novel fast optical switch based on two cascaded terahertz optical asymmetric demultiplexers (TOAD)

Glesk, I. (2002) A novel fast optical switch based on two cascaded terahertz optical asymmetric demultiplexers (TOAD). Optics Express, 10 (1). pp. 15-23. ISSN 1094-4087

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Abstract

A novel optical switch based on cascading two terahertz optical asymmetric demultiplexers (TOAD) is presented. By utilizing the sharp edge of the asymmetric TOAD switching window profile, two TOAD switching windows are overlapped to produce a narrower aggregate switching window, not limited by the pulse propagation time in the SOA of the TOAD. Simulations of the cascaded TOAD switching window show relatively constant window amplitude for different window sizes. Experimental results on cascading two TOADs, each with a switching window of 8ps, but with the SOA on opposite sides of the fiber loop, show a minimum switching window of 2.7ps.