{HEAD ~ A laser system} using {TAIL ~ a cw HeNe laser} for transmitting a beam through a dioic into an unstable resonator 
{ HEAD ~ A laser system } using { TAIL ~ a cw HeNe laser } for transmitting a beam through a dioic into an unstable resonator
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH