Reconfigurable optical quadrature amplitude modulation converter/encoder using a tunable complex coefficient optical tapped delay line
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Updated: May 8, 2026

Quasi-light Storage for Optical Data Packets
Published on: February 6, 2014
Salman Khaleghi1, Mohammad Reza Chitgarha, Omer F Yilmaz
1Department of Electrical Engineering, University of Southern California, Los Angeles, California 90089, USA. khaleghi@usc.edu
Abstract:
We experimentally demonstrate a reconfigurable optical converter/encoder for quadrature amplitude modulated (QAM) signals. The system utilizes nonlinear wavelength multicasting, conversion-dispersion delays, and simultaneous nonlinear multiplexing and sampling. We show baud rate tunability (31 and 20 Gbaud) and reconfigurable conversions from lower-order QAM signals to higher-order QAM signals (e.g., 64-QAM).
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