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13 March 2024 Pulse shaping with dispersion engineered optical filters for single-pass narrowband second harmonic generation
Kanako Tajima, Katsuya Iwata, Masaharu Kameda, Kazuhiko Misawa, Terumasa Ito
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Proceedings Volume PC12875, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXIV; PC1287509 (2024) https://doi.org/10.1117/12.3003104
Event: SPIE LASE, 2024, San Francisco, California, United States
Abstract
Nonlinear spectroscopy, such as sum-frequency generation spectroscopy and coherent Raman spectroscopy, are powerful tools for analyzing transient molecular structural changes. Achieving fast and high-resolution spectroscopy with these methods requires bandwidth compression techniques to convert broadband femtosecond pulses into synchronized narrowband picosecond pulses. Here we present a novel single-pass narrowband SHG method based on a novel pulse-shaping scheme using dispersion-engineered optical filters. In our first verification experiment, we found that the SHG bandwidth after passing the filter was compressed to 1/6, and the wavelength conversion efficiency was improved by 18 times compared to the case without the filter. This result demonstrates that precision-engineered optical filters can be used as a pulse-shaping tool. This alignment-free, single-pass bandwidth compression method may be an important tool for promoting the use of nonlinear spectroscopy in a wider range of fields.
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(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Kanako Tajima, Katsuya Iwata, Masaharu Kameda, Kazuhiko Misawa, and Terumasa Ito "Pulse shaping with dispersion engineered optical filters for single-pass narrowband second harmonic generation", Proc. SPIE PC12875, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXIV, PC1287509 (13 March 2024); https://doi.org/10.1117/12.3003104
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KEYWORDS
Second harmonic generation
Pulse shaping
Optical filters
Femtosecond pulse shaping
Optical engineering
Raman spectroscopy
Pulse signals
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