Extension of grid separation in the finite difference time domain analysis for predicting time-resolved reflectance of an optical pulse from scattering medium with non-scattering regions

• Published in: Optical review (Tokyo, Japan) Vol. 16; no. 4; pp. 452 - 453
• Main Author: Tanifuji, Tadatoshi
• Format: Journal Article
• Language: English
• Published: Japan Optical Society of Japan 01.07.2009; Springer
• Subjects: Atomic; Diffraction and scattering; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Lasers; Microwaves; Molecular; Optical and Plasma Physics; Optical Devices; Optics; Photonics; Physics; Physics and Astronomy; Quantum Optics; RF and Optical Engineering; Short Note; Wave optics; time-resolved reflectance; diffusion equations; scattering medium with non-scattering region; finite difference time domain (FDTD) analysis; Electromagnetic wave scattering; Scattering medium; Theoretical study; Finite difference time-domain analysis; Boundary conditions; Reflectivity; Time resolution; Pulse propagation; Optical pulse
• ISSN: 1340-6000; 1349-9432
• DOI: 10.1007/s10043-009-0086-4

Extension of grid separation in the finite difference time domain (FDTD) analysis has been proposed for predicting time-resolved reflectance of an optical pulse from scattering medium with non-scattering (clear) regions. Grid separation in the previous FDTD analysis formulated by the author was limited to less than 0.5 mm. By introducing the alternative boundary conditions proposed by the author at the surface of scattering medium, the grid separation limit has been extended up to 1 mm. As a result, necessary time to analyze time-resolved reflectance has been reduced to less than a sixtieth without degrading numerical accuracy.