Phase conjugation by low-power continuous-wave degenerate four-wave mixing in nonlinear optical polymer fibers

2004 ◽  
Vol 84 (6) ◽  
pp. 858-860 ◽  
Author(s):  
Shaoping Bian ◽  
Mark G. Kuzyk
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.


2012 ◽  
Vol 584 ◽  
pp. 526-530
Author(s):  
Shubhrajyotsna Aithal ◽  
P. Sreeramana Aithal ◽  
Gopalkrishna Bhat

Nonlinear optical phase conjugation by degenerate four-wave mixing (DFWM) is an important technique with applications in many fields of science and technology. Phase conjugation by Degenerate four-wave mixing is observed in Disperse Orange-25 dye doped in Polymethyl methacrylate – metacrylic acid (PMMA-MA) polymer film under low-power, continuous-wave laser irradiation. A maximum phase conjugate efficiency of 0.22% has been obtained for probe beam intensity at 0.11 W/cm2. Phase conjugation is observed for both parallel- and orthogonally-polarized probe and pump beams. The maximum PC reflectivity is achieved when the angle between probe and forward pump beam is 7 degrees. The effects of dye concentration, intensity of backward, forward pump and inter beam angle between probe and forward pump beam on phase conjugation reflectivity are also studied. PC signal strength first increases and then decreases. PC reflectivity is increased by increasing the intensity of the backward and forward pump beam. The polarization and intensity profile are verified to be preserved in the conjugate signal. The predominant phase conjugation signal is attributed to the facts that reverse saturable absorption and large third order susceptibility of the dye molecules.


2002 ◽  
Vol 75 (4-5) ◽  
pp. 493-495 ◽  
Author(s):  
T. Omatsu ◽  
Y. Ojima ◽  
B.A. Thompson ◽  
A. Minassian ◽  
M.J. Damzen

1999 ◽  
Vol 24 (14) ◽  
pp. 972 ◽  
Author(s):  
S. Mailis ◽  
J. Hendricks ◽  
D. P. Shepherd ◽  
A. C. Tropper ◽  
N. Moore ◽  
...  

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

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