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Wavelength dependence of phase conjugate reflectivity in absorbing media and thermal grating studies by four wave mixing
R Krishna Mohan B Raghavendra Prasad C K Subramanian P S Narayanan
Volume 34 Issue 6 June 1990 pp 461-471
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https://www.ias.ac.in/article/fulltext/pram/034/06/0461-0471 -
Keywords
Optical phase conjugation ;absorbing media ;thermal grating ;Bragg condition -
Abstract
The development of optical phase conjugation using thermally formed gratings in absorbing media, especially the dye solutions, has besides the high efficiencies, many other characteristics which are worthy of study. Here the wavelength dependence of phase conjugate reflectivity in relation to absorption spectrum of rhodamine-6G and rhodamine-B in water, methanol and ethanol is reported. Further the Bragg condition has been verified for the dominant diffracted beam which shows that the thermal grating behaves like an optically thick grating.
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Author Affiliations
R Krishna Mohan1 B Raghavendra Prasad1 C K Subramanian1 P S Narayanan1
- Department of Physics, Indian Institute of Science, Bangalore - 560 012, India
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Dates
- Published
- June 1990
- Manuscript received
- 26 May 1989
- Manuscript revised
- 21 November 1989
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Pramana – Journal of Physics
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