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Optics Letters

Optics Letters


  • Vol. 14, Iss. 21 — Nov. 1, 1989
  • pp: 1231–1233

Radiation loss in bent step-index slab waveguides

Y.H. Cheng and W.G. Lin  »View Author Affiliations

Optics Letters, Vol. 14, Issue 21, pp. 1231-1233 (1989)

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Based on the exact scalar wave equations of bent slab waveguides, locally leaky-mode attenuation constants for both TE and TM modes are derived by using the WKB tunneling theory. Changes in propagation constant due to waveguide bending are considered in our calculation. Under some assumptions, our results are found to be identical to other results obtained using entirely different methods.

© 1989 Optical Society of America

Original Manuscript: May 16, 1989
Manuscript Accepted: August 8, 1989
Published: November 1, 1989

Y.H. Cheng and W.G. Lin, "Radiation loss in bent step-index slab waveguides," Opt. Lett. 14, 1231-1233 (1989)

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  8. That is, the conditions βe/[n2k0(1 + a/Rc)] > 1 and βe/[n1k0(1 − a/Rc)] < 1 are both required for the propagation constant of a locally tunneling leaky mode in bent dielectric optical waveguides.

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