The optical power, e.g. from a high power laser, is conveyed via {HEAD ~ an optical fibre} to {TAIL ~ the controlled device} 
The optical power , e.g. from a high power laser , is conveyed via { HEAD ~ an optical fibre } to { TAIL ~ the controlled device }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL