DEMONSTRATION OF A 15X15 ARRAYED WAVE-GUIDE MULTIPLEXER ON INP

By interconnecting two star couplers with a waveguide grating, we built a monolithic 15 X 15 multiplexer on InP. The grating order of 148 gives a free spectral range of 10.5 nm (1.3 THz) and a channel spacing of 0.7 nm (87 GHz) at 1550 nm wavelength. We measure a crosstalk between adjacent channels of less than 18 dB and a residual crosstalk of less than 25 dB. The on-chip insertion los's is typically 2-4 dB.