Performance Analysis of Modulation Response of a Designed 1550 nm Oxide Confined Vertical Cavity Surface Emitting Laser

Abstract

This paper aims to present the impact of using
oxidized layer and the effect of oxide aperture size on VCSEL’s
modulation performance. After the introduction of oxidized layer,
the characteristics of VCSEL have improved immensely,
especially in modulation performance. The peak material gain of
Al0.06Ga0.24In0.70As/InP MQW VCSEL found from the MATLAB
simulation tools has been utilized for investigating the modulation
characteristics of the laser model. The optical output power of
27.23 dBm is found at 2.5 mA of current injection. Later, by
varying the injection current up to 2.5 mA a maximum frequency
of resonance of 10.75 GHz and the equivalent -3dB cut off
frequency of 11.85 GHz are achieved. It is seen that with the
reduction of oxide aperture size and increase of injection current,
the frequency of resonance in addition to the -3dB cut off
frequency of the laser increases. The use of oxidized layer and
impact of aperture size effect on VCSEL’s -3dB cut off frequency.