Abstract
We present a 980 nm vertical-cavity surface-emitting laser (VCSEL) design which achieves 32 GHz small-signal modulation bandwidth (f3db) at 15 °C and record-high 27 GHz at 85 °C. Our devices utilize binary AlAs/GaAs bottom distributed Bragg reflector material layers to improve thermal conductance. We extract key VCSEL figures-of-merit from static optical output power-current-voltage (LIV), spectral emission, and high frequency dynamic measurements and observe highly temperature stable performance for these parameters.
Highlights
The estimated number of Internet users grew from 2.4 billion in 2014 to about 4.4 billion by June 2019, an 83% increase in the past roughly 5 years [1]
In this paper we present the design and characterization of a simplified epitaxial design of a 980 nm vertical-cavity surface-emitting laser (VCSEL) where we incorporate a hybrid bottom distributed Bragg reflector (DBR) mirror composed of both AlAs/GaAs and AlGaAs/GaAs DBR sections for better heat dissipation and show the impact of this design on the measured VCSEL performance figures-of-merit
We presented our experimental results on top-emitting, oxide-confined 980 nm VCSELs designed to serve as optical sources for short-reach optical interconnects
Summary
The estimated number of Internet users grew from 2.4 billion in 2014 to about 4.4 billion by June 2019, an 83% increase in the past roughly 5 years [1]. The global Internet Protocol traffic reached ∼1.1 zettabytes (1021 bytes) for all of 2017 and is expected to double from about 200 exabytes per month to well over 400 exabytes per month by 2023 [2]. Semiconductor edge-emitting lasers emitting at ∼1300 and 1550 nm are the main light sources in OIs for long distance (>1 km) optical telecommunication while for short reach distances (
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