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Phase-matched nonlinear diffraction Asia Shapira* and Ady Arie
 

Summary: Phase-matched nonlinear diffraction
Asia Shapira* and Ady Arie
Department of Physical Electronics, School of Electrical Engineering, Tel Aviv University, Tel Aviv 69978, Israel
*Corresponding author: asiasapi@post.tau.ac.il
Received March 2, 2011; revised April 21, 2011; accepted April 21, 2011;
posted April 22, 2011 (Doc. ID 143570); published May 13, 2011
We report on a new (to our knowledge) configuration incorporating both birefringence and quasi-phase-matching,
enabling efficient phase-matched nonlinear diffraction in one-dimensional periodically poled nonlinear crystals.
We demonstrate the method experimentally, showing an efficient nonlinear diffraction to the first few orders in two
types of crystals, MgO doped congruent lithium niobate and congruent lithium niobate, and characterize its
efficiency dependence on the fundamental power, the propagation angle, and the crystal temperature. This con-
figuration can increase efficiencies observed in nonlinear diffraction experiments, enables ferroelectric domain
characterization by nonlinear microscopy, and can be used to determine the duty cycles of periodically poled
nonlinear crystals. 2011 Optical Society of America
OCIS codes: 190.2620, 050.1940.
It is well known that when a light beam passes through a
periodic structure, it will diffract in several well defined
angles. An interesting case occurs when only the second
order nonlinear coefficient is periodically modulated,
thereby leading to nonlinear diffraction (NLD): the beam

  

Source: Arie, Ady - Department of Electrical Engineering-Physical Electronics, Tel Aviv University

 

Collections: Engineering