{TAIL ~ An optical semiconductor device} includes a plurality of electrodes formed on {HEAD ~ a common side} of a substrate 
{ TAIL ~ An optical semiconductor device } includes a plurality of electrodes formed on { HEAD ~ a common side } of a substrate
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH