Simulation of Optical Coherence Tomography by Using Finite-Difference Time-Domain Method
Date Issued
2009
Date
2009
Author(s)
Ramadhani, Muhammad Rizki
Abstract
Abstractptical Coherence Tomography (OCT) is a kind of microscopy method that has gained popularity nowadays. It is an optical signal acquisition and processing method that allowed an extremely high-quality, high resolution (micrometer scale), and ability to produce a three-dimensional images from within optical scattering media to be obtained. OCT is widely used in medical field especially in observing the biological tissue, although it is also can be used in photonics for a high precision measurement. Some of OCT advantages are high resolution and also deep penetration.he basic of OCT is interferometry. We use a low coherence light as the light source. Here we try to diagnose the light that is coming from the sample arm with the light from reference arm by using the principle of Michelson interferometer. The combination of reflected light from the sample arm and the reference arm will give rise to an interference pattern only if light from both arms have travelled in the same optical distance. It means that both will have the same optical path length. he real OCT simulation, however, has a limitation from the condition of the place and the material that is being observed. To simplify this problem, we try to simulate the OCT by using the Finite-Difference Time-Domain (FDTD) method. This simulation method allow us to construct a sample material that we need and made a scenario that is suitable for observing the material that is difficult in the real world. In this simulation, we build a sample material and then try to construct a representation of image of the material. Several assumptions are used for this simulation to achieve a better result in the end.ontents
Subjects
Optical Coherence Tomogrpahy
Interference
FDTD
Type
thesis
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