On the other hand, where a laser diode of {HEAD ~ appropriate frequency} emanates {TAIL ~ narrow band radiation} at the absorption frequency of the transition, the stimulation is much more efficient 
On the other hand , where a laser diode of { HEAD ~ appropriate frequency } emanates { TAIL ~ narrow band radiation } at the absorption frequency of the transition , the stimulation is much more efficient
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH