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

被引：0
|
作者：
Shensky, W [1 ]
Cohanoschi, I [1 ]
Sevian, A [1 ]
Hagan, D [1 ]
Van Stryland, E [1 ]
机构：
[1] Univ Cent Florida, CREOL, Sch Opt, Orlando, FL 32816 USA
来源：
LASER-INDUCED DAMAGE IN OPTICAL MATERIALS: 2003 | 2003年 / 5273卷
关键词：
nonlinear optics; two-photon absorption; excited state absorption; optical limiting;
D O I：
10.1117/12.531501
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
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 23ps pulses (FWHM) at 532nm, far from the linear absorption edge of 320nm. For 5ns (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.
引用
收藏
页码：115 / 121
页数：7
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