Phase Conjugation In The Forward Direction With Thin Na Vapor Cells

C. V. Heer; N. C. Griffen

doi:10.1117/12.957781

13 November 1980 Phase Conjugation In The Forward Direction With Thin Na Vapor Cells

C. V. Heer, N. C. Griffen

Proceedings Volume 0190, Los Alamos Conference on Optics 1979; (1980) https://doi.org/10.1117/12.957781
Event: Los Alamos Conference on Optics '79, 1979, Los Alamos, United States

Abstract

During the study of focusing and phase conjugation of photon echoes it became apparent that similar effects occur for either simultaneous pulses or continuous laser radiation. These effects are apparent in the simple two level atom theory in which the stimulated electric dipole is proportional for steady state to [EQUATION] where the electric field amplitude E = A eiφ + B . A(x,z) and φ(x,z) are the amplitude and phase of the signal wave and B is the amplitude of a plane carrier wave. The phase conjugate wave A e-1φ is generated by the A2 + B2 + 2 AB cosφ term in the denominator. Phase conjugation is limited to physically thin cells and a 1 mm Na cell limits the angular spread to ± 20 milliradians. Current experiments with a 2 mm thick Na cell will be discussed. For two laser beams at angle θ, radiation at the phase conjugate -θ, and at higher angles ± 2θ, ±3θ, etc. are observed. Limited phase conjugation such as focusing of a curved wavefront has been observed. More extensive phase conjugation results will be reported.

Citation Download Citation

C. V. Heer and N. C. Griffen "Phase Conjugation In The Forward Direction With Thin Na Vapor Cells", Proc. SPIE 0190, Los Alamos Conference on Optics 1979, (13 November 1980); https://doi.org/10.1117/12.957781

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