Depth profiling of absorbing soft materials using photoacoustic methods

John A. Viator, Steven Jacques, Scott A. Prahl

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

A Q-switched, frequency doubled, Nd:YAG laser coupled to an optical parametric oscillator generated 4.75-ns laser pulses at 726 nm to create subsurface acoustic waves in India ink solutions, India ink acrylamide gels, and in flat segments of elastin biomaterial stained with India ink. The acoustic waves traveled through the target and were detected by a piezoelectric transducer. The waveforms were converted to measurements of initial laser induced pressure and temperature as functions of depth in the material. An algorithm based on Beer's Law was developed and applied to the acoustic signals to extract information about the absorption coefficient as a function of depth in the samples.

Original languageEnglish (US)
Pages (from-to)989-996
Number of pages8
JournalIEEE Journal on Selected Topics in Quantum Electronics
Volume5
Issue number4
DOIs
StatePublished - Jul 1999

Fingerprint

Depth profiling
Photoacoustic effect
inks
India
Ink
acoustics
Acoustic waves
elastin
Elastin
Beer law
Optical parametric oscillators
Piezoelectric transducers
Lasers
piezoelectric transducers
parametric amplifiers
Biomaterials
lasers
YAG lasers
Laser pulses
absorptivity

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics

Cite this

Depth profiling of absorbing soft materials using photoacoustic methods. / Viator, John A.; Jacques, Steven; Prahl, Scott A.

In: IEEE Journal on Selected Topics in Quantum Electronics, Vol. 5, No. 4, 07.1999, p. 989-996.

Research output: Contribution to journalArticle

Viator, John A. ; Jacques, Steven ; Prahl, Scott A. / Depth profiling of absorbing soft materials using photoacoustic methods. In: IEEE Journal on Selected Topics in Quantum Electronics. 1999 ; Vol. 5, No. 4. pp. 989-996.
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