It should be understood that the term “channels” is used broadly herein to describe bore holes, {HEAD ~ V grooves}, or {TAIL ~ other known structure} for holding a fiber 
It should be understood that the term “ channels ” is used broadly herein to describe bore holes , { HEAD ~ V grooves } , or { TAIL ~ other known structure } for holding a fiber
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH