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