Laser radiation intensity limiter based on polymethine dyes

Journal Article · Fri Mar 31 04:00:00 EST 2006 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE2006V036N03ABEH013134· OSTI ID:21459987

Kopylova, T N; Svetlichnyi, Valerii A ^[1]; Lugovsky, A P ^[2]; Podgaetskii, Vitalii M ^[3]; Ponomareva, O V ^[4]

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1. V.D. Kuznetsov Siberian Physical-Technical Institute, Tomsk (Russian Federation)
2. A.N. Sevchenko Research Institute of Applied Physical Problems, Belarusian State University, Minsk (Belarus)
3. Moscow Institute of Electronic Engineering (Technical University), Moscow (Russian Federation)
4. Research and Production Deltacor Limited Liability Company, Moscow region (Russian Federation)

The nonlinear optical properties of a number of polymethine dyes (PD 7005, 7006, 7031, and 7098) with a fixed polymethine chain are studied upon their excitation by the focused second-harmonic radiation from a nanosecond Nd:YAG laser. It is found that PD 7098 has the minimum linear absorption over a greater part of the visible spectrum and the strongest nonlinear reverse saturable absorption. The attenuation coefficient of the 100-MW cm{sup -2} laser radiation in the ethanol solution of this dye is K=14. The characteristics of a single-stage high-power-laser-radiation limiter consisting of two confocal lenses with a focal distance of 5.5 cm are optimised. The maximum values of attenuation coefficients measured in experiments are 420 (for the initial transmission T{sub 0{approx}}50%) and 170 (T{sub 0{approx}}70%). The singlet-singlet absorption cross sections of the dyes are estimated from experiments. The efficient laser radiation limiter considered in the paper features a broad spectral range in the visible region and a high service time. (nonlinear optical phenomena)

• OSTI ID: 21459987
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Journal Name: Quantum Electronics (Woodbury, N.Y.) Journal Issue: 3 Vol. 36; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABSORPTION
ALCOHOLS
ATTENUATION
CROSS SECTIONS
DISPERSIONS
DYE LASERS
DYES
ELECTROMAGNETIC RADIATION
ENERGY-LEVEL TRANSITIONS
ETHANOL
EXCITATION
HOMOGENEOUS MIXTURES
HYDROXY COMPOUNDS
LASER RADIATION
LASERS
LENSES
LIMITERS
LIQUID LASERS
MIXTURES
NEODYMIUM LASERS
NONLINEAR OPTICS
NONLINEAR PROBLEMS
OPTICAL PROPERTIES
OPTICS
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
RADIATIONS
SOLID STATE LASERS
SOLUTIONS
SORPTION
SPECTRA
VISIBLE SPECTRA