Polarization Independent Semiconductor Arrayed Waveguide Gratings Using a Deep-Ridge Waveguide Structure

Masaki KOHTOKU  Hiroaki SANJOH  Satoshi OKU  Yoshiaki KADOTA  Yuzo YOSHIKUNI  

IEICE TRANSACTIONS on Electronics   Vol.E81-C    No.8    pp.1195-1204
Publication Date: 1998/08/25
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on High-Capacity WDM/TDM Networks)
WDM,  multiplexer,  arrayed waveguide grating,  AWG,  polarization independent,  

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This paper describes the design of polarization insensitive InP-based arrayed waveguide gratings (AWGs), and the characteristics of fabricated devices. The use of a deep-ridge waveguide structure made the fabrication of compact polarization-insensitive AWGs possible. As a result, a low crosstalk (-30 dB) 8-channel AWG and a large-scale (64 channel) AWG with 50 GHz channel spacing could be fabricated. An integrated circuit containing an 8-channel AWG with photodetectors is also described.