Elimination of Photorefractlve Grating Writing Instabilities During Contradirectional Two-wave Mixing in Iron-doped Lithium Niobate

D.R. Evans; M.A. Saleh; T.P. Poltenger; T.P. Poltenger; T.J. Burming; T.J. Burming; S. Guha; S. Guha; S.A. Basun; A.F. Ioffe

Conference on Lasers and Electro-Optics
OSA Technical Digest (Optica Publishing Group, 2002),
paper CTuR3

Elimination of Photorefractlve Grating Writing Instabilities During Contradirectional Two-wave Mixing in Iron-doped Lithium Niobate

D.R. Evans, M.A. Saleh, T.P. Poltenger, T.J. Burming, S. Guha, S.A. Basun, and A.F. Ioffe

Conference on Lasers and Electro-Optics 2002

Long Beach, California United States
19–22 May 2002
ISBN: 1-55752-706-7

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Photorefractive and Photo-EMF Effects (CTuR)

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D. R. Evans, M. A. Saleh, T. P. Poltenger, T. J. Burming, S. Guha, S. A. Basun, and A. F. Ioffe, "Elimination of Photorefractlve Grating Writing Instabilities During Contradirectional Two-wave Mixing in Iron-doped Lithium Niobate," in Conference on Lasers and Electro-Optics, M. Fejer, F. Leonberger, J. Fujimoto, and S. Newton, eds., OSA Technical Digest (Optica Publishing Group, 2002), paper CTuR3.

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Abstract

Contra-directional two-beam coupling (TBC) in LiNbO₃:Fe has been a recent subject of investigation.¹ By measuring the power of the transmitted beam, one can monitor the coupling efficiency of the PR gratings. However, repeated jumps (fast instability) in the transmitted and reflected beams have been observed and are attributed to the “quasi-breakdown” of the uniform component of the photovoltaic (PV) field.^2,3 The fast instability has not previously been explored in detail. In addition to the fast instability (nanoseconds), a slower instability (seconds) was observed in LiNbO₃:Fe when using intensities ≈20 times more than those used in Ref. 2.

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