Collinear Optical Two-Dimensional Coherent Spectroscopy with Fluorescence Detection at 5 kHz Repetition Rate
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arXiv
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| Auteurs principaux: | , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866910558801887232 |
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| author | Revesz, Stephen Gatamov, Rustam Misiara, Adolfo Li, Hebin |
| author_facet | Revesz, Stephen Gatamov, Rustam Misiara, Adolfo Li, Hebin |
| contents | Optical two-dimensional coherent spectroscopy (2DCS) is a powerful ultrafast spectroscopic technique that can greatly benefit from the unique features of a femtosecond laser operating at a kHz repetition rate. However, isolating specific nonlinear signal in the collinear geometry, especially with a kHz laser, presents challenges. We present an experimental implementation of optical 2DCS in a collinear geometry using a femtosecond laser operating at a 5 KHz repetition rate. The desired nonlinear signal is selectively extracted in the frequency domain by lock-in detection. Both pump-probe and optical 2DCS experiments were conducted on a rubidium vapor. The signal-to-noise ratio of pump-probe and 2DCS spectra was characterised under various experimental parameters. The study highlights the importance of the lock-in reference frequency in overcoming the limitations imposed by low repetition rates, thereby paving the way for the application of collinear optical 2DCS in material systems requiring kHz femtosecond lasers. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_03412 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Collinear Optical Two-Dimensional Coherent Spectroscopy with Fluorescence Detection at 5 kHz Repetition Rate Revesz, Stephen Gatamov, Rustam Misiara, Adolfo Li, Hebin Optics Applied Physics Optical two-dimensional coherent spectroscopy (2DCS) is a powerful ultrafast spectroscopic technique that can greatly benefit from the unique features of a femtosecond laser operating at a kHz repetition rate. However, isolating specific nonlinear signal in the collinear geometry, especially with a kHz laser, presents challenges. We present an experimental implementation of optical 2DCS in a collinear geometry using a femtosecond laser operating at a 5 KHz repetition rate. The desired nonlinear signal is selectively extracted in the frequency domain by lock-in detection. Both pump-probe and optical 2DCS experiments were conducted on a rubidium vapor. The signal-to-noise ratio of pump-probe and 2DCS spectra was characterised under various experimental parameters. The study highlights the importance of the lock-in reference frequency in overcoming the limitations imposed by low repetition rates, thereby paving the way for the application of collinear optical 2DCS in material systems requiring kHz femtosecond lasers. |
| title | Collinear Optical Two-Dimensional Coherent Spectroscopy with Fluorescence Detection at 5 kHz Repetition Rate |
| topic | Optics Applied Physics |
| url | https://arxiv.org/abs/2408.03412 |