Modeling absorption in saturable absorbers

Non-linear absorption in boric acid glass films with 10 −4 M concentration of fluorescein and rhodamine 6G was measured with beam intensity variation covering six orders of magnitude. The non-linear absorption in these systems has been interpreted in terms of the four-level model of saturable absorb...

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Published inOptics communications Vol. 199; no. 1; pp. 267 - 275
Main Authors Sharan, Alok, Sharma, Ramesh C, Sandhya, S.N, Ayyer, Arvind, Sharma, K.K
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 15.11.2001
Elsevier Science
Subjects
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Non-linear optics
Nonlinear optics
Optical materials
Optical susceptibility, hyperpolarizability
Optics
Other nonlinear optical materials; photorefractive and semiconductor materials
Physics
Polymers and organics
Saturable absorbers
Non-linear optics
Saturable absorbers
Transcendental equation
Four level system
Glass
Theoretical study
Doped materials
Experimental study
Boric acid
Numerical solution
Rhodamines
Fluorescein
Optical materials
Nonlinear optics
Organic compounds
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Summary:Non-linear absorption in boric acid glass films with 10 −4 M concentration of fluorescein and rhodamine 6G was measured with beam intensity variation covering six orders of magnitude. The non-linear absorption in these systems has been interpreted in terms of the four-level model of saturable absorbers. Optimum values of the film parameters have been obtained. Convergence problems encountered in the numerical solutions were successfully overcome.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0030-4018
1873-0310
DOI:10.1016/S0030-4018(01)01568-1