February 1, 1989 / Vol. 14, No. 3 / OPTICS LETTERS 189

Dispersion relations and power-flow expressions for nonlinearmodes guided by a multilayer symmetric dielectric structure:

erratum

Ajit Kumar

Department of Physics, Indian Institute of Technology, Hauz Khas, New Delhi-110016, India

In my Letter' the minus before r2 in Eq. (13) should bereplaced by a plus. Hence the expression inside thefirst set of square brackets in Eq. (13) should read asfollows:

31 (1 + ri + r2)

Reference

1. A. Kumar, Opt. Lett. 13, 68 (1988).

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