Design and fabrication of a broadband polarization and temperature insensitive arrayed waveguide grating on InP

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Abstract
An arrayed waveguide grating (AWG) with a novel S-shaped design for broadband operation is demonstrated for the first time with III–V semiconductors. This device design provided a polarization and temperature insensitive operation. It is also shown that, despite the wide operating range, chromatic dispersion does not degrade the performance of the AWG. The AWG is operational above the absorption edge of the semiconductor (1100nm) and can function for a wide range of wavelengths covering the coarse wavelength multiplexing range from 1270nm to 1610nm. A four channel AWG with this novel design was fabricated and characterized.

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