Confinement and Modal Gain in Dielectric Waveguides.

T.D. Visser; B. Demeulenaere; J. Haes; D. Lenstra; R. Baets; H. Blok

doi:10.1109/50.495172

Confinement and Modal Gain in Dielectric Waveguides.

T.D. Visser
, B. Demeulenaere
, J. Haes
, D. Lenstra
, R. Baets
, H. Blok

Research output: Contribution to Journal › Article › Academic › peer-review

Abstract

Two exact expressions are derived for the effective mode indices of dielectric slab waveguides with complex refractive indices. One is for TE modes, the other for TM modes. The identities are valid for any guided mode of any dielectric slab waveguide and can be succesfully employed to check the accuracy of mode solvers. They explain why TE gain can be much greater than TM gain even when the confinement factors are comparable. Also, it is shown that an often used approximation for the TM gain is unreliable under practical conditions. A correct approximation is given.

Original language	English
Pages (from-to)	885-887
Journal	Journal of Lightwave Technology
Volume	14
DOIs	https://doi.org/10.1109/50.495172
Publication status	Published - 1996

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title = "Confinement and Modal Gain in Dielectric Waveguides.",

abstract = "Two exact expressions are derived for the effective mode indices of dielectric slab waveguides with complex refractive indices. One is for TE modes, the other for TM modes. The identities are valid for any guided mode of any dielectric slab waveguide and can be succesfully employed to check the accuracy of mode solvers. They explain why TE gain can be much greater than TM gain even when the confinement factors are comparable. Also, it is shown that an often used approximation for the TM gain is unreliable under practical conditions. A correct approximation is given.",

author = "T.D. Visser and B. Demeulenaere and J. Haes and D. Lenstra and R. Baets and H. Blok",

year = "1996",

doi = "10.1109/50.495172",

language = "English",

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journal = "Journal of Lightwave Technology",

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T1 - Confinement and Modal Gain in Dielectric Waveguides.

AU - Visser, T.D.

AU - Demeulenaere, B.

AU - Haes, J.

AU - Lenstra, D.

AU - Baets, R.

AU - Blok, H.

PY - 1996

Y1 - 1996

N2 - Two exact expressions are derived for the effective mode indices of dielectric slab waveguides with complex refractive indices. One is for TE modes, the other for TM modes. The identities are valid for any guided mode of any dielectric slab waveguide and can be succesfully employed to check the accuracy of mode solvers. They explain why TE gain can be much greater than TM gain even when the confinement factors are comparable. Also, it is shown that an often used approximation for the TM gain is unreliable under practical conditions. A correct approximation is given.

AB - Two exact expressions are derived for the effective mode indices of dielectric slab waveguides with complex refractive indices. One is for TE modes, the other for TM modes. The identities are valid for any guided mode of any dielectric slab waveguide and can be succesfully employed to check the accuracy of mode solvers. They explain why TE gain can be much greater than TM gain even when the confinement factors are comparable. Also, it is shown that an often used approximation for the TM gain is unreliable under practical conditions. A correct approximation is given.

U2 - 10.1109/50.495172

DO - 10.1109/50.495172

M3 - Article

SN - 0733-8724

VL - 14

SP - 885

EP - 887

JO - Journal of Lightwave Technology

JF - Journal of Lightwave Technology

ER -

Confinement and Modal Gain in Dielectric Waveguides.

Abstract

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