Moreover, {HEAD ~ the distance} between the semiconductor laser tip 2 and {TAIL ~ the laser driving IC} 6 is set to a minimum value so that electric frequency characteristic can be improved 
between
Moreover , { HEAD ~ the distance } between the semiconductor laser tip 2 and { TAIL ~ the laser driving IC } 6 is set to a minimum value so that electric frequency characteristic can be improved
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH