Title

High-sensitivity, Single-beam N2 Measurements

Comments

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Abstract

We present a simple yet highly sensitive single-beam experimental technique for the determination of both the sign and magnitude of n2. The sample is moved along the z direction of a focused Gaussian beam while the repetitively pulsed laser energy is held fixed. The resultant plot of transmittance through an aperture in the far field yields a dispersion-shaped curve from which n2 is easily calculated. A transmittance change of 1% corresponds to a phase distortion of ≃ λ/250. We demonstrate this method on several materials using both CO2 and Nd:YAG laser pulses.

Journal Title

Optics Letters

Volume

14

Issue/Number

17

Publication Date

1-1-1989

Document Type

Article

Language

English

First Page

955

Last Page

957

WOS Identifier

WOS:A1989AM88100017

ISSN

0146-9592

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