32-WAVELENGTH TUNABLE ARRAYED-WAVE-GUIDE GRATING LASER-BASED ON SPECIAL INPUT-OUTPUT ARRANGEMENT

The authors propose a tunable arrayed-waveguide grating (AWG) laser co nstructed using an AWG multiplexer with the minimum number of inputs/o utputs and laser diode (LD) amplifiers fewer than the desired number o f wavelengths. The fabricated 1.55 mu m tunable AWG laser is shown to oscillate successfully at 32 wavelengths with a 0.8 nm wavelength spac ing in accordance with the design.