Optical Second Harmonic Generation in Quasi Phase-Matched Crystals

Published on 16.12.2010 by

Termín přednášky: 16.12.2010 v 15:00
Místo konání:knihovna KTE (EK 619)
Přednášející:Prof. Dr. Roland Schiek (University of Applied Sciences, Regensburg)

Anotace

Parametric amplification, sum and difference frequency generation is a well established method in electrical engineering for mixing frequencies. Due to a lack of powerful sources at optical frequencies in the early days the first frequency doubling at optical frequencies was demonstrated in 1961, shortly after the invention of the laser.
Since then the field of Nonlinear Optics developed rapidly resulting in many applications in laser technology, metrology, optical communication systems, quantum optics and many more.
A key process in nonlinear optics is the frequency mixing between different optical waves. For efficient mixing the involved photons need to obey the laws of energy and momentum conservation. For this purpose the interacting waves need to be “phase-matched”. The development of the “quasi phase-matching technique” during the last 15 years has dramatically increased the number of materials and geometries for efficient frequency mixing devices.
The concepts of quasi phase-matched frequency mixing are explained and visualized by many experimental results. New effects and applications are discussed.

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