LASER INDUCED THERMAL LENS EFFECT IN RHODAMINE B — SIGNATURE OF RESONANT TWO PHOTON ABSORPTION

Author:

BINDHU C. V.1,HARILAL S. S.1,ISSAC RIJU C.1,VARIER GEETHA K.1,NAMPOORI V. P. N.1,VALLABHAN C. P. G.1

Affiliation:

1. Laser Division, International School of Photonics, Cochin University of Science and Technology, Cochin 682 022, India

Abstract

Measurement of thermal lensing signal as a function of laser power made in Rhodamine B solutions in methanol give clear evidence of two photon absorption process within certain concentration ranges when 488 nm Ar + laser beam is used as the pump source. Only one photon process is found to occur when 514 nm and 476 nm beams are used as the pump.

Publisher

World Scientific Pub Co Pte Lt

Subject

Condensed Matter Physics,Statistical and Nonlinear Physics

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