IMAGING OBJECTS HIDDEN IN HIGHLY SCATTERING MEDIA USING FEMTOSECOND 2ND-HARMONIC-GENERATION CROSS-CORRELATION TIME GATING

被引：128

作者：

YOO, KM

XING, QR

ALFANO, RR

机构：

[1] Institute for Ultrafast Spectroscopy and Lasers, Photonic Application Laboratory, Department of Electrical Engineering, The City College of the City University of New York, New York, NY

[2] Department of Precision Instruments, Tianjin University, Tianjin

来源：

OPTICS LETTERS | 1991年 / 16卷 / 13期

关键词：

D O I：

10.1364/OL.16.001019

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A combination of 100-fs cross-correlation time gating and lock-in amplifier detection is shown to be a versatile technique to image objects hidden in highly scattering media. The image is formed from the ballistic component of the ultrafast laser pulse while the diffuse component is eliminated by time gating using cross-correlation second-harmonic generation. The low-noise lock-in amplifier detection method and the high-repetition-rate milliwatt pulsed laser enable us to image through a random medium as thick as 28 scattering mean free paths with submillimeter resolution.

引用

页码：1019 / 1021

页数：3

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