Efficient low-intensity optical phase conjugation based on coherent population trapping in sodium

P. R. Hemmer, D. P. Katz, J. Donoghue, M. Cronin-Golomb, Selim M Shahriar, Prem Kumar

Research output: Contribution to journalArticle

329 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)982-984
Number of pages3
JournalOptics Letters
Volume20
Issue number9
DOIs
StatePublished - Jan 1 1995

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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