This first sleeve abuts {HEAD ~ the unremoved portion} of {TAIL ~ the polymeric waveguide} cladding 
This first sleeve abuts { HEAD ~ the unremoved portion } of { TAIL ~ the polymeric waveguide } cladding
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH