{TAIL ~ An optical isolator element} which is disposed in front of {HEAD ~ a laser array} comprised of a plurality of laser active regions arranged in parallel, comprising 
{ TAIL ~ An optical isolator element } which is disposed in front of { HEAD ~ a laser array } comprised of a plurality of laser active regions arranged in parallel , comprising
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH