Polarization properties of optical phase conjugation by two-photon resonant degenerate four-wave mixing

1989 ◽  
Vol 40 (4) ◽  
pp. 1908-1917 ◽  
Author(s):  
Martti Kauranen ◽  
Daniel J. Gauthier ◽  
Michelle S. Malcuit ◽  
Robert W. Boyd

We present a study of optical phase conjugation through degenerate four-wave mixing in CuCl, as a function of light frequency, intensity, polarization and sample temperature. The phase-conjugate signal exhibits two maxima at the frequencies of the T 5 exciton (one-photon resonance) and of the biexciton (two-photon resonance). By appropriate combinations of the input beam polarizations, it is possible to single out the various terms contributing to the signal (small-spaced, large-spaced population grating and two-photon coherent excitation). The absolute value of X (3) responsible for the two-photon resonance has been determined ( x (3) (-w,w,w, -w) = 3.10 -7 e.s.u.). It leads to ‘mirror’ efficiencies of the order of 10% for input pump intensities I 0 » 10 5 W cm -2 and sample thickness d» 10 -4 cm. At higher I 0 , a saturation of the reflection takes place. The variation of the conjugate beam with temperature has been studied in the range 15 K < T <70 K. Finally, the phase-conjugate nature of the signal has been verified by inserting an aberrator in the path of the input probe beam, and by checking the reconstruction of the reflected beam.


1989 ◽  
Vol 54 (19) ◽  
pp. 1842-1844 ◽  
Author(s):  
S. M. Saltiel ◽  
B. Van Wonterghem ◽  
D. A. Parthenopoulos ◽  
T. E. Dutton ◽  
P. M. Rentzepis

2006 ◽  
Vol 20 (05) ◽  
pp. 245-252 ◽  
Author(s):  
T. GEETHAKRISHNAN ◽  
P. K. PALANISAMY

Optical phase-conjugation (OPC) was observed in Acid blue 9 dye-doped gelatin via degenerate four-wave mixing (DFWM) using a low-power He-Ne laser at 633 nm. Phase-conjugate (PC) signal measurements were made by varying the angle of incidence between the forward-pump beam and the probe beam in the degenerate four-wave mixing geometry. Growth of phase-conjugate signal with respect to the recording time was also measured. Finally double-exposure phase-conjugate interferometry was demonstrated in these dye doped gelatin films.


1988 ◽  
Vol 24 (11) ◽  
pp. 2303-2307 ◽  
Author(s):  
S.M. Saltiel ◽  
B. Van Wonterghem ◽  
T.E. Dutton ◽  
J.A. Hutchinson ◽  
P.M. Rentzepis

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