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- S. L. Albin, J. Barrett, D. Ito, J. E. Mueller
- Queueing Syst.
- 1990

- Shangping Guo, S. L. Albin
- Optics express
- 2003

Cladded multimode fiber optic tapers are proposed as chemical sensors using evanescent wave absorption. There is no need to strip the cladding; therefore, fabrication is easy and the taper is mechanically stronger than the taper without cladding. The transmission property and evanescent wave absorption are modeled using ray theory and wave theory,… (More)

- Shangping Guo, Feng Wu, S. L. Albin, Robert Rogowski
- Optics express
- 2004

A finite-difference frequency-domain (FDFD) method is applied for photonic band gap calculations. The Maxwell's equations under generalized coordinates are solved for both orthogonal and non-orthogonal lattice geometries. Complete and accurate band gap information is obtained by using this FDFD approach. Numerical results for 2D TE/TM modes in square and… (More)

- Stanton DeHaven, S. L. Albin, Warren C. Kelliher
- Optics express
- 2010

A liquid filled microstructured optical fiber (MOF) is used to detect x-rays. Numerical analysis and experimental observation leads to geometric fiber optics theory for MOF photon transmission. A model using this theory relates the quantity and energy of absorbed x-ray photons to transmitted MOF generated photons. Experimental measurements of MOF photon… (More)

- Shangping Guo, Feng Wu, S. L. Albin, Hsiang Hua Tai, Robert Rogowski
- Optics express
- 2004

The dispersion and loss in microstructured fibers are studied using a full-vectorial compact-2D finite-difference method in frequency-domain. This method solves a standard eigen-value problem from the Maxwell's equations directly and obtains complex propagation constants of the modes using anisotropic perfectly matched layers. A dielectric constant… (More)

- Shangping Guo, S. L. Albin
- Optics express
- 2003

A simple implementation of plane wave method is presented for modeling photonic crystals with arbitrary shaped 'atoms'. The Fourier transform for a single 'atom' is first calculated either by analytical Fourier transform or numerical FFT, then the shift property is used to obtain the Fourier transform for any arbitrary supercell consisting of a finite… (More)

- Shangping Guo, S. L. Albin
- Optics express
- 2003

Two numerical techniques for analysis of defect modes in photonic crystals are presented. Based on the finite-difference time-domain method (FDTD), we use plane wave incidences and point sources for excitation and analysis. Using a total-field/scattered-field scheme, an idealplane wave incident at different angles is implemented; defect modes are… (More)

- Shangping Guo, S. L. Albin, Robert Rogowski
- Optics express
- 2004

In this paper, we compare three analysis methods for Bragg fibers, viz. the transfer matrix method, the asymptotic method and the Galerkin method. We also show that with minor modifications, the transfer matrix method is able to calculate exactly the leakage loss of Bragg fibers due to a finite number of H/L layers. This approach is more straightforward… (More)

- Qiang Liu, Zhengbiao Ouyang, S. L. Albin
- Optics express
- 2011

We propose coupled cavities to realize a strong enhancement of the Raman scattering. Five sub cavities are embedded in the photonic crystals. Simulations through finite-difference time-domain (FDTD) method demonstrate that one cavity, which is used to propagate the pump beam at the optical-communication wavelength, has a Q factor as high as
1.254×10⁸ and… (More)

- Shangping Guo, Feng Wu, Khalid Ikram, S. L. Albin
- Optics letters
- 2004

We propose a full-vectorial Galerkin method for the analysis of circular symmetric fibers with arbitrary index profiles. A set of orthogonal Laguerre-Gauss functions is used to calculate the dispersion relation and mode fields of TE and TM modes. Examples are given for both standard step-index fibers and Bragg fibers. For standard step-index fiber with low… (More)