Hannover 2020 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 44: Laser Development and Applications
Q 44.5: Talk
Thursday, March 12, 2020, 12:00–12:15, f435
Stimulated Raman Scattering Spectroscopy on Microplastic Particles with a Noncollinear Optical Parametric Oscillator — •Luise Beichert1,2, Yuliya Binhammer1,2, José Ricardo Andrade1,2, and Uwe Morgner1,2 — 1Leibniz Uni Hannver, Institut für Quantenoptik, Hannover, Germany — 2Cluster of Excellence PhoenixD, Hannover, Germany
Microplastics are widely spread in our global environment. We find them not only in our oceans and inland waters all over the world but also increasingly in our drinking water. Femtosecond Optical Parametric Oscillators are very suitable for microscopy and spectroscopy experiments due to their broadband tuning range at high output power. Noncollinear optical parametric oscillators (NOPOs) provide a good scalability in terms of output 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 without readjustment.
Here, we present an IR-NOPO with a fastly tunable output spectrum between 750 and 950 nm. It can adress Raman transitions in the range of 800-3500 cm−1 in less than 10 ms. We show SRS-spectra of different plastic particles in video rates.