An advantage of the invention is that {HEAD ~ the transition} between the termination and the waveguide cladding is {TAIL ~ strain} relieved 
is
An advantage of the invention is that { HEAD ~ the transition } between the termination and the waveguide cladding is { TAIL ~ strain } relieved
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL OTH