Steady-state four-wave mixing in photorefractive quantum wells with femtosecond pulses

Digital holographic optical coherence imaging is a full-frame coherence-gated imaging approach that uses a CCD camera to record and reconstruct digital holograms from living tissue. Recording digital holograms at the optical Fourier plane has advantages for diffuse targets compared with Fresnel off-axis digital holography. A digital hologram captured at the Fourier plane requires only a 2D fast Fourier transform for numerical reconstruction. We have applied this technique for the depth-resolved imaging of rat osteogenic tumor multicellular spheroids and acquired cross-section images of the anterior segment and the retinal region of a mouse eye. A penetration depth of 1.4 mm for the tumor spheroids was achieved.

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“…) of the PRQW device [9], and the longitudinal resolution is limited by its spectral range (typically 5 nm).…”

Section: ϫ3mentioning

confidence: 99%

Fourier-domain digital holographic optical coherence imaging of living tissue

2007

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“…A detailed study of holographic electric field cross correlation of symmetric off-axis four-wave mixing (where the signal and reference beams are both off axis) in PRQW devices was performed in Ref. 17. Following the same procedure, we here consider the case for twowave mixing.…”

Section: A Depth Resolution Of Adaptive Ocdrmentioning

confidence: 99%

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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“…The self-diffraction of the recording pulses themselves, or diffraction of an auxiliary probe pulse from the developing instantaneous or inertial grating, are still studied nowadays [25]. It has been used for the characterization of the pulses themselves [26,27], plasma filament control in air [6] and nonlinear liquids [11], nonlinear spectroscopy of the materials themselves [7,13], frequency conversion [28,29], etc. The subpicosecond pulses even allowed, quite counter-intuitively, for grating recording with light being strongly nondegenerate in frequency [30].…”

Section: Introductionmentioning

confidence: 99%

Dynamic-grating-assisted energy transfer between ultrashort laser pulses in lithium niobate

et al. 2018

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Energy redistribution between two subpicosecond laser pulses of 2.5 eV photon energy is observed and studied in congruent, nominally undoped LiNbO, aiming to reveal the underlying coupling mechanisms. The dependences of pulse amplification on intensity, frequency detuning and pulse duration point to two different contributions of coupling, both based on self-diffraction from a recorded dynamic grating. The first one is caused by a difference in pulse intensities (transient energy transfer) while the second one originates from a difference in pulse frequencies. The latter appears when chirped pulses are mutually delayed in time. A quite high coupling efficiency has been observed in a 280 µm thin crystal: one order of magnitude energy amplification of a weak pulse and nearly 10% net energy enhancement of one pulse for the case of equal input intensities.

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Steady-state four-wave mixing in photorefractive quantum wells with femtosecond pulses

Cited by 33 publications

References 21 publications

Fourier-domain digital holographic optical coherence imaging of living tissue

Fourier-domain digital holographic optical coherence imaging of living tissue

Adaptive optical coherence-domain reflectometry using photorefractive quantum wells

Dynamic-grating-assisted energy transfer between ultrashort laser pulses in lithium niobate

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