Loss reduction of arrayed waveguide grating with mode converters designed by wavefront matching method

Mode converters have been designed that reduce mode transition losses in arrayed waveguide grating (AWG) multi/demultiplexers using the authors´ recently proposed wavefront matching method. The designed mode converters are very compact and easy to fabricate. AWGs were fabricated equipped with the authors´ mode converters. The loss reduction principle was confirmed experimentally