Browsing by Author "Yi, XM"

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Contradirectional two-wave mixing with partially coherent waves in photorefractive crystals
(1996-08-01)
Yi, XM
;
Lin, SH
;
Yeh, PC
;
Hsu, KY
;
光電工程學系
We investigate contradirectional two-wave mixing with partially coherent waves in photorefractive crystals in the nondepleted pump regime. Equations governing the propagation of the self-coherence function and the mutual-coherence function of the signal wave and the pump wave are derived and simulated numerically. Numerical solutions of these equations are in excellent agreement with the experimental measurements. (C) 1996 Optical Society of America
General solution of contradirectional two-wave mixing with partially coherent waves in photorefractive crystals
(1997-06-01)
Yi, XM
;
Yang, CX
;
Yeh, PC
;
Lin, SH
;
Hsu, KY
We investigate contradirectional two-wave mixing with partially coherent waves in photorefractive crystals. By use of a statistical theory on linear systems, a general formulation of the problem in the space and frequency domain is derived and implemented numerically. We obtain results on beam intensity and mutual coherence. The results on the enhancement of mutual coherence are compared with previous theoretical results on simpler cases and with experimental measurements. Excellent agreements are achieved. The results also indicate that the effective interaction length can be significantly longer than the coherence length of the waves. (C) 1997 Optical Society of America.