Detection of higher nonlinear harmonics of volume photorefractive gratings in reflection geometry

✍ Scribed by P. Arora; V.M. Petrov; J. Petter; T. Tschudi

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 336 KB
• Volume: 278
• Category: Article
• ISSN: 0030-4018
• DOI: 10.1016/j.optcom.2007.06.033

✦ Synopsis

A comprehensive technique has been used to detect diffraction from the second and the third nonlinear spatial harmonic components, along with the fundamental harmonic of volume photorefractive gratings recorded in a channel waveguide in a LiNbO 3 substrate. For the first time to our knowledge, efficient diffraction from the higher spatial harmonic components of a photorefractive grating has been detected in reflection geometry. The dependence of a Bragg wavelength shift on the order of nonlinearity is also reported.