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