Title

Femtosecond continuum spectroscopy and Kramers-Kronig relations

Abstract

A nonlinear spectrophotometer that can measure nondegenerate spectra from ≅1.7 μm in the infrared (IR) to ≅200 nm in the UV is developed. Dual diode arrays for the IR and visible are used to measure the spectral changes in the transmittance against a reference beam. The measured nonlinear spectra are subsequently merged and the Kramers-Kronig integral is performed. The Kramers-Kronig method gives a reliable nonlinear refraction dispersion from the nonlinear absorption spectrum. This separates ultrafast nonlinear absorption from cumulative effects such as excited state absorption. The resulting excited state refractive spectra agree with independent measurements performed using Z-scans with a picosecond optical parametric oscillator.

Publication Date

12-1-1998

Publication Title

Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS

Volume

2

Number of Pages

197-198

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

Socpus ID

0032303169 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0032303169

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