Efficient low-intensity optical phase conjugation based on coherent population trapping in sodium
Optics Letters, Vol. 20, Issue 9, pp. 982-984 (1995)
http://dx.doi.org/10.1364/OL.20.000982
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Abstract
We have observed optical phase-conjugate gain (>50) in sodium vapor, using low-intensity pump lasers (1 W/cm2), with a response time of the order of 1 µs. Coherent population trapping is experimentally identified as the phase-conjugate mechanism. A theoretical model is presented that supports these observations by showing that coherent population trapping can write large-amplitude nonlinear-optical gratings at laser intensities well below those needed to saturate the optical transitions.
© 1995 Optical Society of America
Citation
P. R. Hemmer, D. P. Katz, J. Donoghue, M. Cronin-Golomb, M. S. Shahriar, and P. Kumar, "Efficient low-intensity optical phase conjugation based on coherent population trapping in sodium," Opt. Lett. 20, 982-984 (1995)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-20-9-982
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