Analog Electronic and Optical Multiplexing Techniques for Transmitter Bandwidth Extension

As fiber-optic transmission systems evolve toward higher per-wavelength-channel data rates, the analog bandwidth of digital-to-analog converters (DACs) has become a bottleneck. Here, external analog multiplexing techniques utilizing multiple DACs in each signaling dimension enable us to generate sig...

Full description

Saved in:
Bibliographic Details
Published in:Journal of lightwave technology 2024-10, p.1-16
Main Authors: Yamazaki, Hiroshi, Nagatani, Munehiko, Nakamura, Masanori, Hamaoka, Fukutaro, Kobayashi, Takayuki, Hashimoto, Toshikazu, Miyamoto, Yutaka
Format: Article
Language:English
Subjects:
Bandwidth
bandwidth extension
digital signal processing
digital spectral weaver
digital-to-analog converter (DAC)
High-speed optical techniques
intermediate-frequency-involved multiplexing
Multiplexing
Optical fibers
Optical filters
Optical imaging
Optical modulation
Optical pulse shaping
Optical receivers
Optical transmitter
Optical transmitters
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:As fiber-optic transmission systems evolve toward higher per-wavelength-channel data rates, the analog bandwidth of digital-to-analog converters (DACs) has become a bottleneck. Here, external analog multiplexing techniques utilizing multiple DACs in each signaling dimension enable us to generate signals with bandwidths exceeding the DACs' capabilities. This tutorial provides a comprehensive review of these techniques, including electronic and optical ones. Moreover, it presents an analytical model from the perspective of spectral image superposition as a basis for a unified understanding of the principles of the various schemes.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2024.3484571