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Anomalous variation of thermal lens signal with concentration from rhodamine B in methanol solution
C V Bindhu S S Harilal Riju C Issac Geetha K Varier V P N Nampoori C P G Vallabhan
Volume 44 Issue 3 March 1995 pp 225-229
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https://www.ias.ac.in/article/fulltext/pram/044/03/0225-0229 -
Keywords
Thermal lens ;laser dyes -
Abstract
Thermal lens signals in solutions of rhodamine B laser dye in methanol are measured using the dual beam pump-probe technique. The nature of variations of signal strength with concentration is found to be different for 514 and 488 nm Ar+ laser excitations. However, both the pump wavelengths produce an oscillatory type variation of thermal lens signal amplitude with the concentration of the dye solution. Probable reasons for this peculiar behaviour (which is absent in the case of fluorescent intensity) are mentioned.
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Author Affiliations
C V Bindhu1 S S Harilal1 Riju C Issac1 Geetha K Varier1 V P N Nampoori1 C P G Vallabhan1
- Laser Division, School of Photonics, Cochin University of Science and Technology, Cochin - 682 022, India
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Dates
- Published
- March 1995
- Manuscript received
- 12 September 1994
- Manuscript revised
- 12 December 1994
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Pramana – Journal of Physics
Volume 97, 2023
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