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Optica Publishing Group
  • Quantum Electronics and Laser Science Conference
  • OSA Technical Digest (Optica Publishing Group, 1996),
  • paper JTuI1

Processing and applications of electric field periodic poled LiNbO3

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Abstract

Efficient conversion in nonlinear optical crystals requires phase matching, typically achieved by use of the crystal birefringence to compensate for wavelength dispersion. Quasi-phase matching (QPM) in a nonlinear material is an attractive way to overcome many limitations of birefringent phase matching. The sign of the nonlinear optical susceptibility is reversed periodically so that the waves constructively interfere.1 Any three-wave interaction can be phase matched noncritically, irrespective of the birefringence. The highest nonlinear coefficient can be utilized (e.g., deff=2/πd33 =5d31 in LiNbO3). All three waves copropagate thus avoiding walkoff and the associated limitations. QPM is most promising in low power systems where high nonlinearity is required.

© 1996 Optical Society of America

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