Effect of laser beam induced nonlinearity on the performance of crystalline lens

This paper presents the performance of the human crystalline lens having gradient index (GRIN) structure in the presence of a moderate power laser pulse. Nonlinear dynamical equations have been set-up governing the laser pulse propagation in the lens by taking into account the nonlinearity introduce...

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Bibliographic Details
Published inOptics communications Vol. 274; no. 1; pp. 139 - 145
Main Authors Sharma, R.P., Strickland, D., Campbell, M.C.W.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 01.06.2007
Elsevier Science
Subjects
Beam characteristics: profile, intensity, and power; spatial pattern formation
Biological and medical sciences
Exact sciences and technology
Eye and associated structures. Visual pathways and centers. Vision
Fundamental and applied biological sciences. Psychology
Fundamental areas of phenomenology (including applications)
General aspects
Gradient-index (grin) devices
Instrumentation. Materials. Reagents. Research laboratory organization
Laser optical systems: design and operation
Optical elements, devices, and systems
Optics
Physics
Vertebrates: nervous system and sense organs
Human
Beam profiles
Optical self-focusing
Gradient index
Grin devices
Laser applications in medicine
Eye
Pulse propagation
Electromagnetic wave propagation
Intensity distribution
Laser beam
Pulsed laser
fs range
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Summary:This paper presents the performance of the human crystalline lens having gradient index (GRIN) structure in the presence of a moderate power laser pulse. Nonlinear dynamical equations have been set-up governing the laser pulse propagation in the lens by taking into account the nonlinearity introduced by the laser pulse. Semi-analytical results have been obtained by using the paraxial ray approximation when GRIN and nonlinearity effects are simultaneously present. Performance of the lens has been analyzed in two explicit cases. In the first case, only the GRIN structure is considered while in the second case the nonlinearity and the GRIN both are considered. A moderate power laser pulse can be used for self-focusing in the crystalline lens when GRIN effects alone are not sufficient to focus the laser pulse in the crystalline lens.
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2007.01.077