In particular, the present invention relates to optical switches having {HEAD ~ a greater number} of {TAIL ~ switching states} than a conventional Generalized Mach Zehnder interferometer  
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In particular , the present invention relates to optical switches having { HEAD ~ a greater number } of { TAIL ~ switching states } than a conventional Generalized Mach Zehnder interferometer
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH