Laser-based ultrasound detection using photorefractive quantum wells

被引：50

作者：

Lahiri, I

Pyrak-Nolte, LJ

Nolte, DD

Melloch, MR

Kruger, RA

Bacher, GD

Klein, MB

机构：

[1] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA

[2] Purdue Univ, Sch Elect & Comp Engn, W Lafayette, IN 47907 USA

[3] Indiana Univ, Med Ctr, Dept Radiol, Indianapolis, IN 46202 USA

[4] Lasson Technol, Pacific Palisades, CA 90272 USA

来源：

APPLIED PHYSICS LETTERS | 1998年 / 73卷 / 08期

关键词：

D O I：

10.1063/1.122078

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate a laser-based adaptive ultrasonic homodyne receiver using dynamic holography in AlGaAs/GaAs photorefractive multiple quantum wells. The dynamic hologram acts as an adaptive beamsplitter that compensates wavefront distortions in the presence of speckle and requires no path-length stabilization. The photorefractive quantum wells have the unique ability to achieve maximum linear homodyne detection regardless of the value of the photorefractive phase shift by tuning the excitonic spectral phase. We achieve a root mean square noise-equivalent surface displacement of 6.7 x 10(-7) Angstrom (W/Hz)(1/2). (C) 1998 American Institute of Physics. [S0003-6951(98)02434-6].

引用

页码：1041 / 1043

页数：3

共 18 条

[1] DETECTION OF ULTRASONIC MOTION OF A SCATTERING SURFACE BY 2-WAVE MIXING IN A PHOTOREFRACTIVE GAAS CRYSTAL [J].