Element for {HEAD ~ optical isolator} and optical isolator employing the same, together with semiconductor laser module employing {TAIL ~ the optical isolator element} 
Element for { HEAD ~ optical isolator } and optical isolator employing the same , together with semiconductor laser module employing { TAIL ~ the optical isolator element }
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL