How to measure laser chirp rate at single-emitter excitation energies
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arXiv
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| Main Authors: | , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866908694916104192 |
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| author | Mounier, Timothée Kaiser, Moritz Tuncel, Mert Arenas, Iker Avila Schwarz, René Krämer, Ria G. Nolte, Stefan Kappe, Florian Karli, Yusuf Weihs, Gregor Remesh, Vikas |
| author_facet | Mounier, Timothée Kaiser, Moritz Tuncel, Mert Arenas, Iker Avila Schwarz, René Krämer, Ria G. Nolte, Stefan Kappe, Florian Karli, Yusuf Weihs, Gregor Remesh, Vikas |
| contents | We present a simple and direct method for measuring laser chirp rate, i.e., group delay dispersion (GDD) of ultrashort laser pulses at power levels compatible with single-quantum-emitter excitation. Traditional pulse characterization techniques rely on nonlinear optical processes that require high peak powers, making them unsuitable for the attojoule-to-femtojoule regime relevant to quantum photonics. Our approach utilizes a wavelength-to-time mapping method in which the arrival times of spectrally filtered components of a broadband pulse are recorded using a superconducting nanowire single-photon detector and correlated via a high-resolution time-tagging system. The resulting linear relationship between wavelength and arrival time directly yields the dispersion parameter and, subsequently, the GDD. Beyond single-emitter excitation, this technique can be applied in areas such as single-photon spectroscopy, ultralow-power optical communications, and time-domain quantum control, where linear and non-destructive dispersion characterization is essential. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_05541 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | How to measure laser chirp rate at single-emitter excitation energies Mounier, Timothée Kaiser, Moritz Tuncel, Mert Arenas, Iker Avila Schwarz, René Krämer, Ria G. Nolte, Stefan Kappe, Florian Karli, Yusuf Weihs, Gregor Remesh, Vikas Optics Mesoscale and Nanoscale Physics Quantum Physics We present a simple and direct method for measuring laser chirp rate, i.e., group delay dispersion (GDD) of ultrashort laser pulses at power levels compatible with single-quantum-emitter excitation. Traditional pulse characterization techniques rely on nonlinear optical processes that require high peak powers, making them unsuitable for the attojoule-to-femtojoule regime relevant to quantum photonics. Our approach utilizes a wavelength-to-time mapping method in which the arrival times of spectrally filtered components of a broadband pulse are recorded using a superconducting nanowire single-photon detector and correlated via a high-resolution time-tagging system. The resulting linear relationship between wavelength and arrival time directly yields the dispersion parameter and, subsequently, the GDD. Beyond single-emitter excitation, this technique can be applied in areas such as single-photon spectroscopy, ultralow-power optical communications, and time-domain quantum control, where linear and non-destructive dispersion characterization is essential. |
| title | How to measure laser chirp rate at single-emitter excitation energies |
| topic | Optics Mesoscale and Nanoscale Physics Quantum Physics |
| url | https://arxiv.org/abs/2512.05541 |