Two-photon-induced excited-state absorption in high-index fibers

William M. Shensky III; Ion Cohanoschi; Armen Sevian; David J. Hagan; Eric W. Van Stryland

doi:10.1117/12.531501

10 June 2004 Two-photon-induced excited-state absorption in high-index fibers

William M. Shensky III, Ion Cohanoschi, Armen Sevian, David J. Hagan, Eric W. Van Stryland

Proceedings Volume 5273, Laser-Induced Damage in Optical Materials: 2003; (2004) https://doi.org/10.1117/12.531501
Event: XXXV Annual Symposium on Optical Materials for High Power Lasers: Boulder Damage Symposium, 2003, Boulder, Colorado, United States

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 0.8 cm/GW using 23 ps pulses (FWHM) at 532 nm, far from the linear absorption edge of 320 nm. 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.

Citation Download Citation

William M. Shensky III, Ion Cohanoschi, Armen Sevian, David J. Hagan, and Eric W. Van Stryland "Two-photon-induced excited-state absorption in high-index fibers", Proc. SPIE 5273, Laser-Induced Damage in Optical Materials: 2003, (10 June 2004); https://doi.org/10.1117/12.531501

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