Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 58: Poster: Quantum Optics and Photonics IV
Q 58.39: Poster
Donnerstag, 3. März 2016, 16:30–19:00, Empore Lichthof
Noncollinear optical parametric oscillators for Raman Spectroscopy — •Luise Beichert1, Yuliya Khanukaeva1, and Uwe Morgner1,2,3 — 1Institute of Quantum Optics, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover, Germany — 2Centre for Quantum Engineering and Space-Time Research (QUEST), Welfengarten 1, 30167 Hannover, Germany — 3Laser Zentrum Hannover (LZH), Hollerithallee 8, 30419 Hannover, Germany
Meanwhile microplastics can be detected at an increasing rate in our oceans as well as in our drinking water. We present new light sources with a high bandwith and high output power for detecting these particles via simulated Raman scattering.
Noncollinear optical parametric oscillators (NOPOs) provide a good scalability in terms of power, repetition rate and pulse energy. The instantaneous broadband frequency conversion combined with the special phase matching geometry in the nonlinear crystal enables a fast tunability of the spectrum without readjustment.
We show the concept of a multi-colour NOPO for the Raman spectroscopy. Using the frequency-doubled radiation of an infrared pumplaser will lead to an IR-NOPO, tunable from 650 to 950 nm. With help of the third harmonic the spectrum will be shifted to the visible spectral regime. Introducing a second focus with an additional sum frequency process in the VIS-NOPO will even generate UV-radiation about 350 nm.