The optical isolator element may be formed with a rectangular configuration in conformity to the arranged form of {HEAD ~ a plurality} of {TAIL ~ laser active regions} of a laser array 
The optical isolator element may be formed with a rectangular configuration in conformity to the arranged form of { HEAD ~ a plurality } of { TAIL ~ laser active regions } of a laser array
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH