Title :
Demonstration of Spectral Phase O-CDMA Encoding and Decoding in Monolithically Integrated Arrayed-Waveguide-Grating-Based Encoder
Author :
Cao, Jing ; Broeke, R.G. ; Fontaine, N.K. ; Ji, C. ; Du, Y. ; Chubun, N. ; Aihara, K. ; Pham, Anh-Vu ; Olsson, F. ; Lourdudoss, S. ; Yoo, S.J.B.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Davis, CA
Abstract :
We report on successful spectral phase encoding and decoding operation in a pair of monolithically integrated InP encoder chips, each consisting of an arrayed waveguide grating (AWG) pair and an eight-channel electrooptic phase shifter array. The monolithic fabrication process includes anisotropic reactive ion etching and planarizing hydride-vapor-phase-epitaxy lateral regrowth to realize buried hetero-waveguide structures in AWGs and phase shifters. Electrooptical modulation in the phase shifter arrays in the encoder chip achieved Walsh-code-based optical code-division multiple access (O-CDMA) encoding and decoding. The matched-code encoding-decoding operation resulted in error-free performance in the presence of an interferer, indicating good potential for O-CDMA network applications
Keywords :
III-V semiconductors; Walsh functions; arrayed waveguide gratings; code division multiple access; decoding; electro-optical modulation; encoding; indium compounds; integrated optics; integrated optoelectronics; monolithic integrated circuits; optical fibre networks; optical phase shifters; sputter etching; InP encoder chips; O-CDMA network applications; Walsh code; anisotropic reactive ion etching; arrayed waveguide grating; buried heterowaveguide; eight-channel phase shifter array; electrooptic phase shifter array; electrooptical modulation; error-free performance; hydride-vapor-phase-epitaxy lateral regrowth; matched-code encoding-decoding; monolithic fabrication; monolithic integration; optical code division multiple access; spectral phase decoding; spectral phase encoding; Arrayed waveguide gratings; Decoding; Electrooptical waveguides; Encoding; Indium phosphide; Optical arrays; Optical device fabrication; Optical waveguides; Phase shifters; Phased arrays; Arrayed waveguide grating (AWG); monolithic integration; optical code-division multiple access (O-CDMA); spectral encoder and decoder;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2006.887189
