Open Access64 Gb/s PAM4 VCSEL-based FSO link
Author(s) -
HaiHan Lu,
Chung-Yi Li,
Chun-Ming Ho,
MingTe Cheng,
Xin-Yao Lin,
Zhanyu Yang,
Hwan-Wei Chen
Publication year - 2017
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.005749
Subject(s) - vertical cavity surface emitting laser , optics , bit error rate , transmission (telecommunications) , free space optical communication , optical link , transmitter , laser , computer science , optical communication , physics , optoelectronics , telecommunications , optical fiber , decoding methods , channel (broadcasting)
A 64 Gb/s four-level pulse amplitude modulation (PAM4) vertical-cavity surface-emitting laser (VCSEL)-based free-space optical (FSO) link with an external light injection scheme is proposed and successfully demonstrated. Experimental results show that the 11.2 GHz VCSEL with an external light injection scheme is sufficiently powerful for 64 Gb/s PAM4 FSO links. This study is the first one that adopts a 1550-nm VCSEL transmitter with an external light injection scheme in a 64 Gb/s PAM4 FSO link. The link performances of the proposed PAM4 VCSEL-based FSO links have been analyzed in real-time in terms of eye diagrams and offline processed by Matlab in terms of bit error rate (BER) performances. Good BER performance and clear eye diagrams are acquired over a 100-m free-space link. Such a proposed 64 Gb/s PAM4 VCSEL-based FSO link with an external light injection scheme is a promising one for providing high transmission rate and long transmission distance.