Interferometric applications of GaAs adaptive photo-EMF detectors

Степанов, С. И.; Montero, P. Rodriguez; Flores, M.A. Celis; Mixcóatl, Juan Castillo; López, Arturo Aguirre; Carrasco, L. Arroyo; Sánchez, Mauro Sánchez

doi:10.1364/jot.69.000428

Cited by 2 publications

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“…Adaptive OCDR inherits the same point-scan detection mode from conventional OCDR and differs only in that an adaptive component is used to mix the signal with the reference field. The principle of adaptive OCDR has also been demonstrated previously using an adaptive photoelectromotive-force detector, 8,9 yet the microwattlevel sensitivity of this method is not enough for biological imaging. A more practical method is based on highspeed adaptive homodyne interferometry.…”

Section: Introductionmentioning

confidence: 97%

Adaptive optical coherence-domain reflectometry using photorefractive quantum wells

Peng

Nolte

et al. 2004

J. Opt. Soc. Am. B

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Adaptive optical-coherence-domain reflectometry (OCDR) is performed by use of an adaptive interferometer and homodyne detection. The adaptive element of the interferometer is a photorefractive quantum-well device in a two-wave mixing geometry. The mixing self-adaptively maintains constant relative phase between the signal and reference waves and dynamically compensates gross movements of the sample or optical components as well as image speckle. The application described here is used for laser ranging into and through turbid media. Adaptive OCDR is a bridge between conventional optical coherence tomography and adaptive holographic optical coherence imaging. The insertion loss for the adaptive performance is Ϫ15 dB, but adaptive OCDR has potential applications for coherence tomography under conditions of large target motion and low background. We also demonstrate its potential application for optoacoustics and laser-based ultrasound detection.

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Section: Introductionmentioning

confidence: 97%

Adaptive optical coherence-domain reflectometry using photorefractive quantum wells

Peng

Nolte

et al. 2004

J. Opt. Soc. Am. B

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Speckle Measurement for Small In-Plane Vibration Using GaAs

Gao

Zhang

Feng

et al. 2023

Sensors

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In this study, the measurement characteristics of speckles based on the photoinduced electromotive force (photo-emf) effect for high-frequency, small-amplitude, and in-plane vibration were theoretically and experimentally studied. The relevant theoretical models were utilized. A GaAs crystal was used as the photo-emf detector for experimental research, as well as to study the influence of the amplitude and frequency of the vibration, the imaging magnification of the measuring system, and the average speckle size of the measuring light on the first harmonic of the induced photocurrent in the experiments. The correctness of the supplemented theoretical model was verified, and a theoretical and experimental basis was provided for the feasibility of using GaAs to measure in-plane vibrations with nanoscale amplitudes.

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Interferometric applications of GaAs adaptive photo-EMF detectors

Cited by 2 publications

References 0 publications

Adaptive optical coherence-domain reflectometry using photorefractive quantum wells

Adaptive optical coherence-domain reflectometry using photorefractive quantum wells

Speckle Measurement for Small In-Plane Vibration Using GaAs

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