TITLE

Optical vibration detection with a photoconductance monitoring array

AUTHOR(S)
Heinz, P.; Garmire, E.
PUB. DATE
April 2004
SOURCE
Applied Physics Letters;4/19/2004, Vol. 84 Issue 16, p3196
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
An approach for the detection of intensity variations at frequencies in the megahertz range is proposed. An array of semi-insulating GaAs photoconductance sensors is used to detect the intensity variations that result from lateral motion of a speckle or interference pattern. The outputs of the individual array elements are summed to obtain a large signal. A prominent application that may benefit from this approach is the detection of speckle motion induced by ultrasonic surface displacements of optically rough surfaces in nondestructive testing. © 2004 American Institute of Physics.
ACCESSION #
12817043

 

Related Articles

  • Double shock front formation in cylindrical radiative blast waves produced by laser irradiation of krypton gas. Kim, I.; Quevedo, H. J.; Feldman, S.; Bang, W.; Serratto, K.; McCormick, M.; Aymond, F.; Dyer, G.; Bernstein, A. C.; Ditmire, T. // Physics of Plasmas;Dec2013, Vol. 20 Issue 12, p123101 

    Radiative blast waves were created by irradiating a krypton cluster source from a supersonic jet with a high intensity femtosecond laser pulse. It was found that the radiation from the shock surface is absorbed in the optically thick upstream medium creating a radiative heat wave that travels...

  • Development of an Optical System for Simultaneous Ultrasonic Wave Propagation Imaging at Multi-points. Lee, J.-R.; Yoon, C.-Y. // Experimental Mechanics;Dec2010, Vol. 50 Issue 7, p1041 

    This paper introduces the development of an optical system for simultaneous ultrasonic propagation imaging at multi-points. For the system, fiber acoustic wave grating sensors (FAWGSs) and a Q-switched pulsed laser (QPL) mirror scanner are utilized for simultaneous multipoint sensing and remote...

  • On the Measurement of Spatially-Resolved Energy Characteristics of a High-Power Laser Radiation. Solov’ev, A. P.; Zyuryukina, O. V.; Perchenko, M. I. // Technical Physics Letters;Oct2000, Vol. 26 Issue 10, p882 

    Behavior of a signal of the Rayleigh scattering of a laser radiation in air was studied depending on the parameters of an ultrasonic wave excited in the region of observation. It is shown that the presence of an ultrasonic wave in this region provides for a spatial resolution in the direction of...

  • Theoretical and Experimental Investigation of Ultrasonic Waves Radiated from a Wet Surface Using a Line-Focused Laser Beam. Shi-Chang Wooh; Quanlin Zhou; Jiyong Wang // Experimental Mechanics;Dec2003, Vol. 43 Issue 4, p450 

    In this paper we use with a theoretical model and experimental study to predict the characteristics of the ultrasonic waves irradiated from a wet surface illuminated by a line-focused laser beam. The theoretical model is developed by assuming normal surface tractions distributed elliptically...

  • Technique for measurement of photoacoustic waves in situ with ultrasound probe beam. Yao, Yong; Xing, Da; Ueda, Ken-ichi; Chen, Qun // Journal of Applied Physics;7/15/2003, Vol. 94 Issue 2, p1278 

    A method of measuring photoacoustic (PA) waves in situ is proposed and experimentally demonstrated. A focused probe ultrasonic beam passes through a sample and tags the position of the interested PA signal. The probe beam interacts with PA wave. The PA signal modulated probe beam is recorded...

  • Laser-ultrasonic attenuation and absorption measurements in metals. Perton, M.; Lévesque, D.; Moreau, A.; Lamouche, G.; Monchalin, J.-P. // AIP Conference Proceedings;5/18/2012, Vol. 1430 Issue 1, p235 

    The attenuation of an acoustic wavefront in metals comes from scattering caused by grain anisotropy and random grain orientation and from absorption caused by mechanisms such as dislocation and magnetic domain motion. In this paper laser ultrasonics, with its non-contact and broadband...

  • The Effect of Laser Radiation on the Conductivity of Poly(diacetylene). Pavlinov, A. B.; Raevskii, I. P. // Technical Physics Letters;Dec2000, Vol. 26 Issue 12, p1096 

    It is demonstrated that an increase in the dark conductivity of poly(diacetylene) (PDA) upon laser irradiation in oxygen-containing media is determined by the formation of thin conducting surface layers. Pulsed laser irradiation at an energy of 0.04 J, a wavelength of 530 nm, and a pulse...

  • Detection of Superconductivity in a High-Pressure Chamber with Diamond Anvils by Mutual Induction Method with Laser-Modulated Sample Temperature. Timofeev, Yu.; Utyuzh, A. // Instruments & Experimental Techniques;Jul/Aug2005, Vol. 48 Issue 4, p550 

    An improved method for detecting the transition of a sample to the superconducting state at high pressure in a chamber with diamond anvils is proposed. The background signal and the signal determined by the transition of a sample to the superconducting state are separated using the method of a...

  • Deep level photothermal spectroscopy: Physical principles and applications to semi-insulating GaAs band-gap multiple trap states. Mandelis, Andreas; Xia, Jun // Journal of Applied Physics;Feb2008, Vol. 103 Issue 4, p043704 

    A coupled transport-rate theory of free photoexcited carrier densities and band-gap trap states in direct-gap semiconductors with fast band-to-band recombination rates is presented. The rate equations are decoupled and solved analytically by means of an adiabatic principle which leads to time...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics