High-power femtosecond mid-IR source with tunable center frequency and chirp
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arXiv
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| Hauptverfasser: | , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866916368894394368 |
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| author | Boie, Larissa Strudwick, Benjamin H. Winkler, Rafael T. Deng, Yunpei Johnson, Steven L. |
| author_facet | Boie, Larissa Strudwick, Benjamin H. Winkler, Rafael T. Deng, Yunpei Johnson, Steven L. |
| contents | We present an experimental implementation of a chirped mid-infrared (mid-IR) high-power laser source with variable center frequency between 4 THz to 30 THz and continuously tunable frequency sweep of up to 20 % within one pulse, with a pulse duration of 2 ps. The peak electric field obtained at 4 THz is 1.5 MV/cm. We generate the mid-IR light using a difference-frequency generation (DFG) process with two phase-locked, chirped IR pulses. The obtained mid-IR electric field waveform is characterized using electro-optic sampling. We compare our experimental results with the predictions of numerical simulations. The results indicate the potential for efficient driving of vibrational modes into a strongly anharmomic regime, in cases where using Fourier-transform-limited pulses to achieve similar vibrational amplitudes would lead to dielectric breakdown. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_13583 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | High-power femtosecond mid-IR source with tunable center frequency and chirp Boie, Larissa Strudwick, Benjamin H. Winkler, Rafael T. Deng, Yunpei Johnson, Steven L. Optics We present an experimental implementation of a chirped mid-infrared (mid-IR) high-power laser source with variable center frequency between 4 THz to 30 THz and continuously tunable frequency sweep of up to 20 % within one pulse, with a pulse duration of 2 ps. The peak electric field obtained at 4 THz is 1.5 MV/cm. We generate the mid-IR light using a difference-frequency generation (DFG) process with two phase-locked, chirped IR pulses. The obtained mid-IR electric field waveform is characterized using electro-optic sampling. We compare our experimental results with the predictions of numerical simulations. The results indicate the potential for efficient driving of vibrational modes into a strongly anharmomic regime, in cases where using Fourier-transform-limited pulses to achieve similar vibrational amplitudes would lead to dielectric breakdown. |
| title | High-power femtosecond mid-IR source with tunable center frequency and chirp |
| topic | Optics |
| url | https://arxiv.org/abs/2408.13583 |