The use of Spatial Light Modulators (SLM), Liquid Crystal Devices for atmospheric turbulence simulation in
optical system has increased in the recent years. These devices allow the development of test-beds that can be
used to simulate, analyze and improve optical components or systems in a controlled laboratory environment
before further implementation on the eld. Most research has been performed at visible wavelengths with
the use of a vast array of atmospheric turbulence simulation algorithms. We present preliminary work on an
atmospheric simulation test bed which uses an algorithm developed at NRL with a transmissive high denition
Liquid Crystal Device SLMs for applications in the short-wavelength infrared, with the main focus of interested
at 1550nm. Preliminary results are shown for the application to a high denition re
ective Liquid Crystal Device
SLM for the same wavelength.
Advances in the fields of optics and optical communications have created a demand for effectively measuring
relative phase changes along an optical path or within an optical system. We present a method for obtaining these
measurements using an interferometric setup with processing involving Empirical Mode Decomposition and the
Hilbert Transform. In this work, the Hilbert Transform algorithm is justified by accurately measuring the phase
changes in software generated signals. Progress and improvements are shown regarding the ongoing design and
implementation of an experimental benchtop setup. This testbed will prove the method in applications such as
measuring and recording phase changes caused by propagating light through a turbulent freespace channel.
In this work, a free-space infrared communications system is described. The system has the capability of using
previously captured scintillation data and introducing the effects onto the bench-top system. This effectively acts as
a scintillation simulator which emulates an optical link that is effected by the weather and various physical
conditions at the time of transmission. The method used for scintillation simulation is described. The transmission
method of the system is a hybrid combination of traditional frequency modulation (FM) and optical amplitude
modulation (OAM) combined with Multiple Quantum Well (MQW) Modulating Retroreflector (MRR) technology.
The result has produced a robust, low power system that is capable of transmitting real-time audio information with
high clarity along a channel that accurately simulates the atmospheric effects of scintillation. The system is capable
of transmitting along a link of several kilometers, depending specifically on the characteristics of the interrogator
and sensor components chosen for the system.