Title

Two-Photon Induced Excited-State Absorption In High-Index Fibers

Keywords

Excited state absorption; Nonlinear optics; Optical limiting; Two-photon absorption

Abstract

We have studied the nonlinear optical properties of a high-index (n=1.82) glass that is used as the core material in a commercially available fiber optic inverter, which is a coherent fiber bundle twisted 180 degrees to produce an inverted image. We have determined through open aperture Z-scan the two-photon absorption coefficient of the glass to be 0.8cm/GW using 23 ps pulses (FWHM) at 532nm, far from the linear absorption edge of 320nm. For 5 ns (FWHM) pulses the nonlinear absorption is much larger, and is dominated by two-photon induced excited-state absorption. These effects contribute to the nanosecond optical limiting response that we have observed for the inverter using an F/5 focusing geometry.

Publication Date

10-26-2004

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

5273

Number of Pages

115-121

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/12.531501

Socpus ID

5544224915 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/5544224915

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