Propagation of a Finite Optical Beam in an Inhomogeneous Medium

Lutomirski, R. F.; Yura, H. T.

doi:10.1364/ao.10.001652

Cited by 261 publications

(73 citation statements)

References 6 publications

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“…Based on the extended Huygens-Fresnel principle [14], this model takes into account multiple scattering effects, and thus the depth profile of the OCT signal is a function of both µ s and g as well as other parameters. This model is general and capable of handling different sample arm geometries, i.e., dynamic vs. fixed focusing.…”

Section: Oct Modelmentioning

confidence: 99%

Determination of optical scattering properties of highly-scattering media in optical coherence tomography images

Levitz¹,

Thrane²,

Frosz³

et al. 2004

Opt. Express

186

150

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Abstract:We developed a new algorithm that fits optical coherence tomography (OCT) signals as a function of depth to a general theoretical OCT model which takes into account multiple scattering effects. With use of this algorithm, it was possible to extract both the scattering coefficient and anisotropy factor from a particular region of interest in an OCT image. The extraction algorithm was evaluated against measurements from an integrating sphere on a set of tissue phantoms and yielded valid results. Finally, a preliminary ex vivo OCT investigation on human aortic specimen indicated that the algorithm may contribute importantly to differentiation between normal and atherosclerotic arteries. We conclude that this algorithm may facilitate tissue characterization by OCT. MacNeill, S. L. Houser, H. T. Aretz, E. F. Halpern, and I. K. Jang, "Evaluation of intracoronary stenting by intravascular optical coherence tomography," Heart 89, 317-321 (2003). ©2004 Optical Society of America

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Section: Oct Modelmentioning

confidence: 99%

Determination of optical scattering properties of highly-scattering media in optical coherence tomography images

Levitz¹,

Thrane²,

Frosz³

et al. 2004

Opt. Express

186

150

View full text Add to dashboard Cite

show abstract

“…The initial derivation of this mutual coherence function employed the Rytov approximation [8,13], hence D(ρ 1 − ρ 2 , ρ 1 − ρ 2 ) was termed the twosource, spherical-wave wave structure function, and the validity of Eqs. (9) and (10) was limited to the weakperturbation regime before the onset of saturated scintillation.…”

Section: Evaluating Average Intermodal Cross Talkmentioning

confidence: 99%

A flexible cross-talk simulator for multiple spatial-mode free-space optical communication

Shapiro

2014

SPIE Proceedings

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Laser communication with both high photon information efficiency (many bits/detected-photon) and high spectral efficiency (many bits/sec-Hz) is impossible with a single spatial-mode free-space link. Achieving these high efficiencies in the same system requires operation with 10's to 1000's of high-transmissivity spatial modes. Such systems will likely be restricted to 1 to 10 km line-of-sight terrestrial paths on which turbulence-induced cross talk will be encountered. In this paper we propose a cross-talk simulator for multiple spatial-mode free-space optical communication that could provide valuable information about the relevant merits of different mode sets when they are employed in conjunction with real modal multiplexers and demultiplexers.

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“…From the extended Huygens-Fresnel principle 2,3 we have that the average z = 0 to z = L power-transfer efficiency at time t is…”

Section: Channel Modelsmentioning

confidence: 99%

Reciprocity-Enhanced Optical Communication Through Atmospheric Turbulence—Part II: Communication Architectures and Performance

Puryear

Shapiro

Parenti

2013

J. Opt. Commun. Netw.

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Free-space optical communication provides rapidly deployable, dynamic communication links that are capable of very high data rates compared with those of radio-frequency systems. As such, free-space optical communication is ideal for mobile platforms, for platforms that require the additional security afforded by the narrow divergence of a laser beam, and for systems that must be deployed in a relatively short time frame. In clear-weather conditions the data rate and utility of free-space optical communication links are primarily limited by fading caused by micro-scale atmospheric temperature variations that create parts-per-million refractive-index fluctuations known as atmospheric turbulence. Typical communication techniques to overcome turbulence-induced fading, such as interleavers with sophisticated codes, lose viability as the data rate is driven higher or the delay requirement is driven lower. This paper, along with its companion [J. H. Shapiro and A. Puryear, "Reciprocity-Enhanced Optical Communication through Atmospheric Turbulence-Part I: Reciprocity Proofs and Far-Field Power Transfer"], present communication systems and techniques that exploit atmospheric reciprocity to overcome turbulence which are viable for high data rate and low delay requirement systems. Part I proves that reciprocity is exhibited under rather general conditions, and derives the optimal power-transfer phase compensation for far-field operation. The Part II paper presents capacity-achieving architectures that exploit reciprocity to overcome the complexity and delay issues that limit state-of-the art free-space optical communications. Further, this paper uses theoretical turbulence models to determine the performance-delay, throughput, and complexity-of the proposed architectures.

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Propagation of a Finite Optical Beam in an Inhomogeneous Medium

Cited by 261 publications

References 6 publications

Determination of optical scattering properties of highly-scattering media in optical coherence tomography images

Determination of optical scattering properties of highly-scattering media in optical coherence tomography images

A flexible cross-talk simulator for multiple spatial-mode free-space optical communication

Reciprocity-Enhanced Optical Communication Through Atmospheric Turbulence—Part II: Communication Architectures and Performance

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