Excitation of higher spatial harmonics by a moving light pattern in sillenites

T.E. McClelland, David J. Webb, B.I. Sturman, E. Shamonina, M. Mann, K.H. Ringhofer

Research output: Contribution to journalArticlepeer-review


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 =(0.25-0.3). For contrasts m˜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.
Original languageEnglish
Pages (from-to)115-321
Number of pages207
JournalOptics Communications
Issue number4-6
Publication statusPublished - 1 Nov 1996


  • dependence
  • higher harmonics
  • space-charge field
  • detuning frequency
  • pump waves
  • interference pattern
  • bistability
  • hysteresis
  • narrow resonance
  • nonlinear excitation


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