{HEAD ~ Fiber} 30 has one end coupled to laser 22 and {TAIL ~ another end} coupled to handpiece 36 
has
{ HEAD ~ Fiber } 30 has one end coupled to laser 22 and { TAIL ~ another end } coupled to handpiece 36
HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH