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