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PAM-6 generation using 32-QAM constellation
Author(s): L. Chorchos
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Paper Abstract

In this paper an intermediate solution to pulse amplitude modulation with 4 levels (PAM-4) and PAM-8, namely PAM-6 is presented. The generation of the signal is based on a constellation from 32-quadrature amplitude modulation (32-QAM) and assumes the I and Q components to be interleaved, which allows its application in intensity modulation/direct detection systems. The PAM-6 modulation shows higher resistance to noise than PAM-8 and increased by 25% the bitrate for constant bandwidth when compared to PAM-4. In the paper, experimental results and a comparison of PAM-6 modulation to PAM-4 and PAM-8 is made for an electrical interface, a directly modulated 850nm VCSEL and an externally modulated 1310nm DFB laser.

Paper Details

Date Published: 1 February 2019
PDF: 10 pages
Proc. SPIE 10946, Metro and Data Center Optical Networks and Short-Reach Links II, 109460N (1 February 2019); doi: 10.1117/12.2509732
Show Author Affiliations
L. Chorchos, Warsaw Univ. of Technology (Poland)

Published in SPIE Proceedings Vol. 10946:
Metro and Data Center Optical Networks and Short-Reach Links II
Atul K. Srivastava; Madeleine Glick; Youichi Akasaka, Editor(s)

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