Phase mismatch effects on the dynamics of a semilinear photorefractive oscillator with reflection-type gratings

• Published in: Applied physics. B, Lasers and optics Vol. 91; no. 3-4; pp. 583 - 589
• Main Authors: Rebhi, R., Mathey, P., Grapinet, M., Jauslin, H.-R., Odoulov, S.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer-Verlag 01.06.2008; Springer
• Subjects: Diffraction gratings; Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics; Engineering; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Gratings (spectra); Joining; Lasers; Mathematical analysis; Nonlinear optics; Optical Devices; Optical materials; Optics; Oscillations; Oscillators; Other nonlinear optical materials; photorefractive and semiconductor materials; Phase conjugation, optical mixing; photorefractive and kerr effects; Photonics; Physical Chemistry; Physics; Physics and Astronomy; Pumps; Quantum Optics; Strength; Beat Frequency; Phase Conjugate; Coupling Strength; Pump Beam; Pump Wave; Photorefractive effect; Non linear material; Phase mismatch; Numerical solution; Ternary compounds; Barium Titanates; Theoretical study; Optical materials; Nonlinear dynamical systems; Experimental study; Reflection grating; Nonlinear optics
• ISSN: 0946-2171; 1432-0649
• DOI: 10.1007/s00340-008-3036-0

This paper describes the effect of pump waves misalignement on the performance of the semilinear photorefractive coherent oscillator with the reflection gratings. The oscillation intensity and its modulation frequency are calculated numerically for different misalignement angles, coupling strengths and pump intensity ratios. It is shown that a small angular detuning of the pump wave, less than one milliradian, extends the range of pump ratios and the range of coupling strengths for which a non-degenerate oscillation occurs. The results of experiments with the BaTiO 3 -based semilinear oscillator are in qualitative agreement with the calculated data.