We realised a tunable UV laser source at 253 nm for Doppler-broadening thermometry on the 1S0-3P1 intercombination line in mercury vapors. Our setup is based on the two-stage second harmonic generation of a 1015 nm diode laser in a fiber-coupled periodically-poled lithium niobate waveguide crystal and a beta-barium borate crystal in enhancement cavity, and we exploit injection locking of a 507 nm diode laser to boost the available optical power after the first duplication. The realized source has 1x10-4 relative intensity stability, Gaussian shape and over 10 GHz mode-hop-free tunable range. These features are necessary for retrieving the thermodynamic temperature of the atomic sample from the absorption profile with 10-6 accuracy. This will make Doppler broadening thermometry a viable technique for the practical realization of the kelvin in the new International System of Units.
A tunable UV spectrometer for Doppler broadening thermometry of mercury / Clivati, Cecilia; Gravina, Stefania; Castrillo, Antonio; Costanzo, Giovanni A.; FILIPPObLEVI, ; Gianfrani, Livio. - In: OPTICS LETTERS. - ISSN 0146-9592. - STAMPA. - 45:13(2020), pp. 3693-3696. [10.1364/OL.393793]
Titolo: | A tunable UV spectrometer for Doppler broadening thermometry of mercury | |
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Data di pubblicazione: | 2020 | |
Rivista: | ||
Digital Object Identifier (DOI): | http://dx.doi.org/10.1364/OL.393793 | |
Appare nelle tipologie: | 1.1 Articolo in rivista |
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sorgente_UV_lastbeforesubmit.pdf | Paper pre referaggio | 1. Preprint / submitted version [pre- review] | PUBBLICO - Tutti i diritti riservati | Visibile a tuttiVisualizza/Apri |
ol-45-13-3693_Published paper.pdf | Paper pubblicato | 2a Post-print versione editoriale / Version of Record | Non Pubblico - Accesso privato/ristretto | Administrator Richiedi una copia |
Costanzo-Atunable.pdf | 2. Post-print / Author's Accepted Manuscript | PUBBLICO - Tutti i diritti riservati | Visibile a tuttiVisualizza/Apri |
http://hdl.handle.net/11583/2831054