2-PHOTON ABSORPTION IN DIAMOND AND ITS APPLICATION TO ULTRAVIOLET FEMTOSECOND PULSE-WIDTH MEASUREMENT

被引：84
作者：
DADAP, JI
FOCHT, GB
REITZE, DH
DOWNER, MC
机构：
[1] Department of Physics, University of Texas at Austin, Austin, TX
来源：
OPTICS LETTERS | 1991年 / 16卷 / 07期
关键词：
D O I：
10.1364/OL.16.000499
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Intensity-dependent transmission measurements of 310-nm femtosecond pulses show that diamond has a two-photon absorption coefficient of 0.75 +/- 0.15 cm/GW, in approximate agreement with universal scaling formulas for two-photon absorption in diamond-structure materials. We then demonstrate that two-photon absorption is strong enough to permit simple measurements of ultraviolet femtosecond pulse widths in single-crystal diamond plates that are thin enough (250-mu-m) to be both inexpensive and dispersion free. Autocorrelation measurements of 10-50-nJ, 0.18-1.4-ps pulses are presented. The method requires no phase matching and can be applied to pulses in the wavelength range of 220-550 nm.
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页码：499 / 501
页数：3
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