Furthermore, a time difference between the fundamental mode and {HEAD ~ highest order mode} when {TAIL ~ the modes} arrive at the ends of the mode converters must be smaller than a modulation rate to result in no signal distortion 
Furthermore , a time difference between the fundamental mode and { HEAD ~ highest order mode } when { TAIL ~ the modes } arrive at the ends of the mode converters must be smaller than a modulation rate to result in no signal distortion
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH