Armenian Journal of Physics

FABRY-PEROT INTERFERENCE IN QUASI-PHASE-MATCHED SECOND HARMONIC GENERATION IN GREEN MICROCHIP LASER

Kerobyan, M. and Kostanyan, R.B. and Soghomonyan, S. and Essaian, S. (2014) FABRY-PEROT INTERFERENCE IN QUASI-PHASE-MATCHED SECOND HARMONIC GENERATION IN GREEN MICROCHIP LASER. Armenian Journal of Physics, 7 (4). pp. 201-212. ISSN 1829-1171

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Abstract

We report on experimental and theoretical study of temperature tuning of single pass quasiphase- matched second harmonic generation in a plane parallel PPMgOLN (periodically poled MgO doped LiNbO3) crystal in a green microchip laser. Periodic oscillations of second harmonic power upon variation of the temperature are observed. The oscillation period (4.8°C – 8.4°C) is several times smaller than the temperature acceptance bandwidth (18.4°C – 32.1°C), and the period strongly correlates with the crystal length. Formula for temperature dependence of second harmonic power is derived, which takes into account multiple reflections of fundamental and second harmonic waves in the nonlinear crystal. Comparison of experimental and theoretical data allows us to conclude that the origin of the oscillations is the multiple beam Fabry-Perot interference in the plane parallel nonlinear crystal.

Item Type:Article
Uncontrolled Keywords:green microchip laser, second harmonic generation, Fabry-Perot interference
Subjects:Physics > 81.Materials science
Physics > 85.Electronic and magnetic devices; microelectronics
ID Code:706
Deposited By:Prof. Vladimir Aroutiounian
Deposited On:07 Dec 2014 22:23
Last Modified:15 Dec 2014 12:29

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