Abstract

The mode characteristics of a planar five-layer W-lightguide with various refractive indices of the intermediate layer are investigated, based on a numerical solution of the dispersion equation. It is shown that it is easy to ensure the single-mode regime in a broad range of wavelengths, the necessary field concentration in a large-diameter lightguide core, and efficient filtering of the evanescent modes in W-lightguides by appropriately choosing the geometrical and optical parameters.

© 2014 Optical Society of America

Numerical prediction of fiber transmission characteristics from arbitrary refractive-index profiles

W. L. Mammel and L. G. Cohen
Appl. Opt. 21(4) 699-703 (1982)

Radiation forces on a microsphere in an arbitrary refractive index profile

Kang Soo Lee, Sang Youl Yoon, Kyung Heon Lee, Sang Bok Kim, Hyung Jin Sung, and Sang Soo Kim
J. Opt. Soc. Am. B 29(3) 407-414 (2012)

Analytical extraction of leaky modes in circular slab waveguides with arbitrary refractive index profile

P. Sarrafi, N. Zareian, and K. Mehrany
Appl. Opt. 46(36) 8656-8667 (2007)

Calculation of TE modes in graded-index nonlinear optical waveguides with arbitrary profile of refractive index

N. Saiga
J. Opt. Soc. Am. B 8(1) 88-94 (1991)

Modes of a planar waveguide with Fermi index profile

T. R. Chen and Z. L. Yang
Appl. Opt. 24(17) 2809-2812 (1985)