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Simultaneous phase matching of optical parametric oscillation and second-harmonic

Summary: Simultaneous phase matching of optical
parametric oscillation and second-harmonic
generation in aperiodically poled lithium niobate
Tolga Kartaloglu, Z. Gu¨rkan Figen, and Orhan Aytu¨r
Department of Electrical and Electronics Engineering, Bilkent University, TR-06533 Bilkent, Ankara, Turkey
Received June 5, 2002; revised manuscript received September 10, 2002
We report a simple ad hoc method for designing an aperiodic grating structure to quasi-phase match two ar-
bitrary second-order nonlinear processes simultaneously within the same electric-field-poled crystal. This
method also allows the relative strength of the two processes to be adjusted freely, thereby enabling maximi-
zation of the overall conversion efficiency. We also report an experiment that is based on an aperiodically
poled lithium niobate crystal that was designed by use of our method. In this crystal, parametric oscillation
and second-harmonic generation are simultaneously phase matched for upconversion of a femtosecond Ti:sap-
phire laser to 570 nm. This self-doubling optical parametric oscillator provides an experimental verification of
our design method. © 2003 Optical Society of America
OCIS codes: 190.2620, 190.7220, 190.4400, 190.4970, 190.4410, 190.4360.
In recent years there has been a growing interest in the
simultaneous phase matching of two different nonlinear
interactions within the same second-order nonlinear


Source: Aytur, Orhan - Department of Electrical Engineering, Bilkent University


Collections: Engineering