ARRAY WAVEGUIDE GRATING AND TUNABLE LASER HAVING SAME

摘要

An array waveguide grating (AWG) (30) and tunable laser (1000) having the same; the AWG (30) comprises an input coupler (31), a first array waveguide area (33) and a second array waveguide area (34); the first array waveguide area (33) comprises a plurality of first waveguides (331), and the neighboring first waveguides (331) have a first optical path difference; the second array waveguide area (34) comprises a plurality of second waveguides (341), and the neighboring second waveguides (341) have a second optical path difference, and the first optical path difference is not equal to the second optical path difference.