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