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