McClelland, T.E. and Webb, D.J. and Sturman, B.I. and Shamonina, E. and Mann, M. and Ringhofer, K.H. (1996) Excitation of higher spatial harmonics by a moving light pattern in sillenites. Optics Communications, 131 (4-6). pp. 315-321. ISSN 0030-4018.
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We investigate numerically the dependence of higher harmonics of the space-charge field on the detuning frequency between the pump waves, which form a running interference pattern. Bistability and hysteresis of harmonics are predicted for a contrast of the interference pattern m greater than or similar to (0.25-0.3). For contrasts m similar or equal to 1 and small detuning frequencies we show the existence of a narrow resonance, connected with the nonlinear excitation of a slowly decreasing sequence of spatial harmonics, For experiments we use a BSO crystal in the optical configuration which avoids nonlinear optical distortions. The experimental data show good qualitative agreement with theory.
|Subjects:||Q Science > QC Physics|
|Divisions:||Faculties > Science Technology and Medical Studies > School of Physical Sciences > Optics|
|Depositing User:||F.D. Zabet|
|Date Deposited:||25 Jun 2009 12:35|
|Last Modified:||25 Jun 2009 12:35|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/18669 (The current URI for this page, for reference purposes)|
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