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