## Abstract

An erratum is presented to correct two typing mistakes in our paper.

©2007 Optical Society of America

In our paper [1], we discovered two minor typing errors. The errors are in Equations (2) and (3), both of which are on page 7492. There was a λ_{o} missing on the numerators of the right sides of both equations (2) and (3). The correct equations (2) and (3) are presented in the following:

(2)$$\mathrm{\Delta}\lambda =\left(\frac{2{n}_{s}{\lambda}_{o}}{2\pi R{n}_{b}+2L{n}_{s}}\mathrm{\Delta}L\right)\u2044\left(1-{\lambda}_{o}\frac{2\pi R\frac{d{n}_{b}}{d\lambda}+2L\frac{d{n}_{s}}{d\lambda}}{2\pi R{n}_{b}+2L{n}_{s}}-{\lambda}_{o}\frac{2\frac{d{n}_{s}}{d\lambda}}{2\pi R{n}_{b}+2L{n}_{s}}\mathrm{\Delta}L\right)$$ (3)$$\Delta \lambda =\left(\frac{2{n}_{s}{\lambda}_{o}}{2\pi R{n}_{b}+2L{n}_{s}}\mathrm{\Delta}L\right)\u2044\left(1-{\lambda}_{o}\frac{2\pi R\frac{d{n}_{b}}{d\lambda}+2L\frac{d{n}_{s}}{d\lambda}}{2\pi R{n}_{b}+2L{n}_{s}}\right)$$
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### Equations (2)

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(2)
$$\mathrm{\Delta}\lambda =\left(\frac{2{n}_{s}{\lambda}_{o}}{2\pi R{n}_{b}+2L{n}_{s}}\mathrm{\Delta}L\right)\u2044\left(1-{\lambda}_{o}\frac{2\pi R\frac{d{n}_{b}}{d\lambda}+2L\frac{d{n}_{s}}{d\lambda}}{2\pi R{n}_{b}+2L{n}_{s}}-{\lambda}_{o}\frac{2\frac{d{n}_{s}}{d\lambda}}{2\pi R{n}_{b}+2L{n}_{s}}\mathrm{\Delta}L\right)$$
(3)
$$\Delta \lambda =\left(\frac{2{n}_{s}{\lambda}_{o}}{2\pi R{n}_{b}+2L{n}_{s}}\mathrm{\Delta}L\right)\u2044\left(1-{\lambda}_{o}\frac{2\pi R\frac{d{n}_{b}}{d\lambda}+2L\frac{d{n}_{s}}{d\lambda}}{2\pi R{n}_{b}+2L{n}_{s}}\right)$$