High-power, frequency-quadrupled UV laser source resonant with the 1S0-3P1 narrow intercombination transition of cadmium at 326.2 nm

Anno: 2022

Autori: Manzoor S., Tinsley JN., Bandarupally S., Chiarotti M., Poli N.

Affiliazione autori: Univ Firenze, Dipartimento Fis & Astron, I-50019 Sesto Fiorentino, Italy; Univ Firenze, LENS, I-50019 Sesto Fiorentino, Italy; CNR, Ist Nazl Ott, I-50019 Sesto Fiorentino, Italy; Ist Nazl Fis Nucl, Sez Firenze, I-50019 Sesto Fiorentino, Italy.

Abstract: We present a novel high-power, frequency-stabilized UV laser source at 326.2 nm, resonant with the Cd S-1(0)-P-3(1) narrow intercombination transition. We achieve a maximum produced power of 1 W at 326.2 nm by two successive frequency doubling stages of a narrow-linewidth (<1 kHz) seed laser at 1304.8 nm. Approximately 3.4 W of optical power at 652.4 nm is produced by a visible Raman fiber amplifier (VRFA) that amplifies and generates the second harmonic of the infrared radiation. The visible light is subsequently frequency-doubled down to 326.2 nm in a nonlinear bow-tie cavity using a Brewster-cut beta-barium-borate (BBO) crystal, with a maximum conversion efficiency of approximately 40% for 2.5 W of coupled red power. Full characterization of the laser source, together with spectroscopy signals of all Cd isotopes, spanning more than 4 GHz in the UV, are shown. (C) 2022 Optica Publishing Group Giornale/Rivista: OPTICS LETTERS

Volume: 47 (10)      Da Pagina: 2582  A: 2585

Maggiori informazioni: European Research Council (772126, TICTOCGRAV).
Parole chiavi: Continuous-wave
DOI: 10.1364/OL.457979

Citazioni: 8
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-06-29
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