Session Index

Optical Waveguides and Communications

Waveguide Devices
Friday, Dec. 8, 2017  13:00-14:30
Presider: Hung-Wen Chang
Room: International Research Building IR6002-B(6F)
Notes:
13:00 - 13:15 Paper No.  2017-FRI-S0206-O001
Hung-Wen Chang A Practical Method for Computing Eigenvectors of Large Block Diagonal Matrices Arriving from Numerical Approximation of Helmholtz Equation
Meng-Kai Hsu;Sin-Yuan Mu;Hung-Wen Chang

Numerical approximation of Helmholtz equation by finite-difference methods generates block diagonal matrices. EM waveguide mode-fields are obtained by computing eigenvalues and corresponding eigenvectors of resulting linear equations which quite often are large. In this paper we show how to execute that with minimum memory requirement.

 
 
13:15 - 13:30 Paper No.  2017-FRI-S0206-O002
Kai-Chieh Chang Gain Enhancement of Single-Mode Cr-Doped Fibers Fabricated by Optimized Molten-Zone Growth
Kai-Chieh Chang;Chun-Nien Liu;Tsung-Hau Wang;Ting-Sou Rou;Nan-Kuang Chen;Sheng-Lung Huang;Wood-Hi Cheng

Gain enhancement of single-mode Cr-doped crystalline core fibers (SMCDCCFs) with longer fiber length employing an optimized molten-zone in laser-heated pedestal growth (LHPG) technique is demonstrated. The SMCDCCFs exhibit a length of 24-cm, a core diameter of 25-μm, a V-value of 2.40, and a 6.44-dB gross gain at wavelength of 1.4-μm.

 
 
13:30 - 13:45 Paper No.  2017-FRI-S0206-O003
Sin-Yuan Mu High-order Compact Vectorial FD-FD Schemes for Dielectric Waveguide at the Corner
Sin-Yuan Mu;Hung-Wen Chang

High-order compact vectorial FD-FD coefficients at the dielectric corner are developed by comprehensive physical consideration around the corner. Combined with the extension of our previous work on uniform region and planar interface, a highly-precise solver for waveguide mode is established. The numerical result exhibits fourth-order accuracy for the modal index.

 
 
13:45 - 14:00 Paper No.  2017-FRI-S0206-O004
Irving Rondon Ojeda Transversal cross section measurement and optical theorem using scalar potentials
Irving Rondon Ojeda

In this work, using a general vector basis representation for the Maxwell equations, we obtain expressions to measure the OT in term of transversal electric (TE) and magnetic (TM) modes. A scalar potential that can be expressed as an invariant propagating beam is assumed.

 
 
14:00 - 14:15 Paper No.  2017-FRI-S0206-O005
YI-JUN CAI Dispersion Compensating Photonic Crystal Fiber for S+C+L Bands
YI-JUN CAI

Dispersion compensating photonic crystal fiber in a broadband of S+C+L bands (1460-1625 nm) with a high compensation ratio of 30:1 and low confinement losses is presented. The fiber is suitable to be used in high-speed optical fiber communication systems like as DWDM system.

 
 
14:15 - 14:30 Paper No.  2017-FRI-S0206-O006
Po-Jen Sung Numerical Experiments with Waveguide Modes Solutions based on Finite-Difference Like Methods with Compact Stencils
Hung-Wen Chang;Po-Jen Sung;Sin-Yuan Mu

We conduct numerical experiments with waveguide modes solutions by finite-difference (FD) approximation of the Helmholtz equation. These methods generate equivalent block diagonal matrices which are then solved by computing their eigenvalues and eigenvectors. We show convergent rates of various FD-like methods and modeling parameters.