Ultrafast transient absorption spectroscopy based on supercontinuum generation with non-linear photonic crystal fiber

Wolfgang Lakata; Cristina Consani; Mario Grueneberg; Gerald Auboeck

doi:10.1117/12.2632220

3 October 2022 Ultrafast transient absorption spectroscopy based on supercontinuum generation with non-linear photonic crystal fiber

Wolfgang Lakata, Cristina Consani, Mario Grueneberg, Gerald Auboeck

Author Affiliations +

Proceedings Volume 12228, Ultrafast Nonlinear Imaging and Spectroscopy X; 1222806 (2022) https://doi.org/10.1117/12.2632220
Event: SPIE Optical Engineering + Applications, 2022, San Diego, California, United States

Conference Poster

Abstract

We present a transient absorption setup based on a low-power laser system and a photonic crystal fiber for supercontinuum generation. The setup employs an ultrafast erbium-doped fiber laser system that emits at 775 nm with 80 MHz repetition rate which pumps a non-linear photonic crystal fiber that provides a supercontinuum in the NIR/VIS wavelength region for probing. By using an acousto optic modulator for pump-beam modulation and a lock-in amplifier we were able to achieve a detection-limit of 1 μOD. The setup reveals the potential of photonic crystal fibers as broadband sources in combination with low-power lasers.

Citation Download Citation

Wolfgang Lakata, Cristina Consani, Mario Grueneberg, and Gerald Auboeck "Ultrafast transient absorption spectroscopy based on supercontinuum generation with non-linear photonic crystal fiber", Proc. SPIE 12228, Ultrafast Nonlinear Imaging and Spectroscopy X, 1222806 (3 October 2022); https://doi.org/10.1117/12.2632220

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