An object of the present invention is to provide a mode converter capable of uniformly coupling {TAIL ~ the power} of {HEAD ~ a fundamental mode} of a single mode optical waveguide to each mode of a multi mode optical waveguide 
An object of the present invention is to provide a mode converter capable of uniformly coupling { TAIL ~ the power } of { HEAD ~ a fundamental mode } of a single mode optical waveguide to each mode of a multi mode optical waveguide
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH