Impact of Damping on 50 Gbps 4-PAM Modulation of 25G Class VCSELs
Journal article, 2017
We present an investigation into the effects of photon lifetime and the associated damping of the modulation response on 50 Gbps 4-PAM signal generation with directly modulated 25G class VCSELs. While 4-PAM benefits from higher slope efficiency and output power, it is shown that the greater impact of intensity noise and dynamic nonlinearities implies that a VCSEL with a longer photon lifetime and more damped response is needed when transitioning from existing 25 Gbps OOK to 50 Gbps 4-PAM using the 25G VCSEL technology.
interconnects
MMF
OOK
fiber-optical communication
inter-symbol interference
850 nm
IM/DD
Data communication
4-PAM
short-range
VCSEL
Author
Tamas Lengyel
Chalmers, Microtechnology and Nanoscience (MC2), Photonics
Krzysztof Szczerba
Emanuel Haglund
Chalmers, Microtechnology and Nanoscience (MC2), Photonics
Petter Westbergh
Magnus Karlsson
Chalmers, Microtechnology and Nanoscience (MC2), Photonics
Anders Larsson
Chalmers, Microtechnology and Nanoscience (MC2), Photonics
Peter Andrekson
Chalmers, Microtechnology and Nanoscience (MC2), Photonics
Journal of Lightwave Technology
0733-8724 (ISSN) 1558-2213 (eISSN)
Vol. 35 19 4203-4209 7982608Areas of Advance
Information and Communication Technology
Subject Categories
Telecommunications
Communication Systems
DOI
10.1109/JLT.2017.2727549