Chirp-compensated pulsed titanium–sapphire laser system for precision spectroscopy

J. Hussels; C. Cheng; E. J. Salumbides; W. Ubachs

doi:10.1364/OL.401703

Chirp-compensated pulsed titanium–sapphire laser system for precision spectroscopy

J. Hussels, C. Cheng, E. J. Salumbides, W. Ubachs^*

^*Corresponding author for this work

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Abstract

Active frequency-chirp control for a narrowband pulsed titanium–sapphire laser oscillator–amplifier laser system is demonstrated using an intra-cavity electro-optic modulator, resulting in improved spectral resolution and stability. Beat-note measurements of its output to a continuous-wave laser locked to an optical frequency comb yields an Allan deviation of 5 × 10⁻¹¹ (at 10 s). Correction of residual chirp from a comparison with the fourth-harmonic upconverted pulsed output to a molecular H₂ two-photon resonance delivers a value for the uncertainty contribution due to frequency chirp below the 1.5 × 10⁻¹⁰ level.

Original language	English
Pages (from-to)	5909-5912
Number of pages	4
Journal	Optics Letters
Volume	45
Issue number	21
Early online date	20 Oct 2020
DOIs	https://doi.org/10.1364/OL.401703
Publication status	Published - 1 Nov 2020

Funding

Funding. European Research Council (670168); Chinese Academy of Sciences (XDB21020100); National Natural Science Foundation of China (21688102).

Funders	Funder number
Horizon 2020 Framework Programme	670168
European Research Council
National Natural Science Foundation of China	21688102
Chinese Academy of Sciences	XDB21020100

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ChirpCompensated pulsed titaniumsapphire laser system for precision spectroscopyFinal published version, 628 KBLicence: Article 25fa Dutch Copyright Act

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AU - Cheng, C.

AU - Salumbides, E. J.

AU - Ubachs, W.

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Y1 - 2020/11/1

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AB - Active frequency-chirp control for a narrowband pulsed titanium–sapphire laser oscillator–amplifier laser system is demonstrated using an intra-cavity electro-optic modulator, resulting in improved spectral resolution and stability. Beat-note measurements of its output to a continuous-wave laser locked to an optical frequency comb yields an Allan deviation of 5 × 10−11 (at 10 s). Correction of residual chirp from a comparison with the fourth-harmonic upconverted pulsed output to a molecular H2 two-photon resonance delivers a value for the uncertainty contribution due to frequency chirp below the 1.5 × 10−10 level.

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Chirp-compensated pulsed titanium–sapphire laser system for precision spectroscopy

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