An Energy Efficient 56 Gbps PAM-4 VCSEL Transmitter Enabled by a 100 Gbps Driver in 0.25 µm InP DHBT Technology
Journal article, 2016

Datacenters demand higher speed VCSEL-based optical interconnects at low power consumption. As a potential technology enabler, this paper presents a wide bandwidth and energy efficient multilevel PAM VCSEL driver implemented in an InP 0.25 μm double heterojunction bipolar transistor (DHBT) technology. The operational bandwidth of the driver is verified and error-free electrical data transmission up to 56 Gbps PAM-2 and 100 Gbps PAM-4 is demonstrated at a driver energy consumption less than 2 pJ/bit. The driver is integrated and tested with an in-house fabricated 850 nm VCSEL. Error-free 56 Gbps PAM-4 optical transmission at a transmitter energy consumption of 3.7 pJ/bit is demonstrated without equalization. This is the highest data rate reported for an integrated PAM-4 modulated VCSEL transmitter, while being the most energy efficient above 40 Gbps operation. Moreover, the VCSEL driver offers a pre-emphasis feature at PAM-2 operation for improved link throughput and receiver sensitivity.

DHBT technology

pre-emphasis

OOK

PAM-2

PAM-4

VCSEL driver

100 GbE

VCSEL transmitter

short-range optical communications

InP

optical interconnects

Author

Jingjing Chen

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

Zhongxia Simon He

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

Tamas Lengyel

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Krzysztof Szczerba

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Petter Westbergh

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Johan Gustavsson

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Herbert Zirath

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

Anders Larsson

Chalmers, Microtechnology and Nanoscience (MC2), Photonics

Journal of Lightwave Technology

0733-8724 (ISSN)

Vol. 34 21 954-4964

Areas of Advance

Information and Communication Technology

Infrastructure

Kollberg Laboratory

Driving Forces

Sustainable development

Subject Categories

Telecommunications

Communication Systems

Signal Processing

DOI

10.1109/JLT.2016.2600591

More information

Created

10/8/2017