Pulse shaping with dispersion engineered optical filters for single-pass narrowband second harmonic generation

Kanako Tajima; Katsuya Iwata; Masaharu Kameda; Kazuhiko Misawa; Terumasa Ito

doi:10.1117/12.3003104

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

Author Affiliations +

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.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

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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