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Enabling the use of Raman lasers for spectroscopy: continuous tunability, narrow linewidth and efficient cascading in diamond
/ Echarri, Daniel T (CERN ; Navarra U.) ; Chrysalidis, Katerina (CERN) ; Fedosseev, Valentin N (CERN) ; Marsh, Bruce A (CERN) ; Mildren, Richard P (Macquarie U.) ; Olaizola, Santiago M (Navarra U.) ; Spence, David J (Macquarie U.) ; Wilkins, Shane G (CERN) ; Granados, Eduardo (CERN)
We demonstrate a Raman laser continuously tunable in the visible range, capable of performing element-selective photo-ionization. The Stokes outputs exhibited a linewidth of 11.0 ± 1.0 GHz with a conversion efficiency of more than 60%..
2020
- Published in : (2020) , pp. C6A_3
In : 14th Pacific Rim Conference on Lasers and Electro-Optics (CLEO PR 2020), Sydney, Austrialia, 3 - 5 Aug 2020, pp.C6A_3
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Spectral synthesis of multimode lasers to the Fourier limit in integrated Fabry–Perot diamond resonators
/ Granados, Eduardo (CERN) ; Granados, Camilo ; Ahmed, Rizwan (CERN) ; Chrysalidis, Katerina (CERN) ; Fedosseev, Valentin N (CERN) ; Marsh, Bruce A (CERN) ; Wilkins, Shane G (CERN) ; Mildren, Richard P (Macquarie U.) ; Spence, David J (Macquarie U.)
Fourier-limited nanosecond pulses featuring narrow spectral bandwidths are required for applications in spectroscopy,
sensing, and quantum optics. Here, we demonstrate a direct and simple route for the generation of single-frequency light
relying on phonon-resonant Raman interactions within a monolithic diamond resonator. [...]
2022 - 8 p.
- Published in : Optica 9 (2022) 317-324
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Spectral purification of single-frequency Stokes pulses in doubly resonant integrated diamond resonators
/ Granados, Eduardo (CERN) ; Stoikos, Georgios (CERN) ; Stoikos, Georgios (Natl. Tech. U., Athens)
Pulsed spectrally pure light is required for applications in high-resolution spectroscopy, optical coherent communications, and quantum technologies. In this work, we report on the efficient generation of high peak power, single-frequency, and tunable nanosecond pulses utilizing stimulated scattering, with an increased spectral brightness by exploiting double resonances in an integrated diamond Raman resonator. [...]
2022 - 4 p.
- Published in : Opt. Lett.: 47 (2022) , no. 16, pp. 3976-3979
- Published in : Opt. Lett.: 48 (2023) , no. 2, pp. 497
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Tunable spectral squeezers based on monolithically integrated diamond Raman resonators
/ Granados, E (CERN) ; Stoikos, G (CERN) ; Echarri, D T (CERN ; Navarra U.) ; Chrysalidis, K (CERN) ; Fedosseev, V N (CERN) ; Granados, C (Max Born Inst., Berlin) ; Leask, V (CERN ; Strathclyde U.) ; Marsh, B A (CERN) ; Mildren, R P (Macquarie U.)
We report on the generation and tuning of single-frequency laser light in a monolithic Fabry–Pérot diamond Raman resonator operating in the visible spectral range. The device was capable of squeezing the linewidth of a broad multi-mode nanosecond pump laser ([Formula: see text] 7.2 ± 0.9 GHz at [Formula: see text] 450 nm) to a nearly Fourier-limited single axial mode Stokes pulse ([Formula: see text] 114 ± 20 MHz at [Formula: see text] 479 nm). [...]
2022 - 7 p.
- Published in : Appl. Phys. Lett. 120 (2022) 151101
Fulltext: PDF;
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Broadly tunable linewidth-invariant Raman Stokes comb for selective resonance photoionization
/ Echarri, Daniel T ; Echarri, Daniel T (CERN ; Navarra U.) ; Chrysalidis, Katerina (CERN) ; Fedosseev, Valentin N (CERN) ; Marsh, Bruce A (CERN) ; Mildren, Richard P (Macquarie U.) ; Olaizola, Santiago M (Navarra U. ; Donostia Intl. Phys. Ctr., San Sebastian) ; Spence, David J (Macquarie U.) ; Wilkins, Shane G (CERN) ; Granados, Eduardo (CERN)
We demonstrate a continuously tunable, multi-Stokes Raman laser operating in the visible range (420 - 600 nm). Full spectral coverage was achieved by efficiently cascading the Raman shifted output of a tunable, frequency-doubled Ti:Sapphire laser. [...]
2020 - 12 p.
- Published in : Opt. Express 28 (2020) 8589-8600
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In-source laser spectroscopy of polonium isotopes: From atomic physics to nuclear structure
Reference: Poster-2014-427
Keywords: CERN ISOLDE in-source laser spectroscopy LIST RILIS Polonium Ionization energy
Created: 2014. -1 p
Creator(s): Rothe, S
The Resonance Ionization Laser Ion Source RILIS [1] at the CERN-ISOLDE on-line radioactive ion beam facility is essential for ion beam production for the majority of experiments, but it is also powerful tool for laser spectroscopy of rare isotopes. A series of experiments on in-source laser spectroscopy of polonium isotopes [2, 3] revealed the nuclear ground state properties of 191;211;216;218Po. However, limitations caused by the isobaric background of surface-ionized francium isotopes hindered the study of several neutron rich polonium isotopes. The development of the Laser Ion Source and Trap (LIST) [4] and finally its integration at ISOLDE has led to a dramatic suppression of surface ions. Meanwhile, the RILIS laser spectroscopy capabilities have advanced tremendously. Widely tunable titanium:sapphire (Ti:Sa) lasers were installed to complement the established dye laser system. Along with a new data acquisition system [5], this more versatile laser setup enabled rst ever laser spectroscopy of the radioactive element astatine [6]. Narrow bandwidth operation of the Ti:Sa lasers [7] facilitated the high resolution spectroscopy of infrared transitions. These advancements of the RILIS laser setup combined with the LIST technique paved the way for the continuation of the polonium campaign at CERN towards neutron-rich isotopes, including 217;219Po, through a suppression of surface ionized francium of up to four orders-of-magnitude. In this contribution, we present the recent results of the in-source laser spectroscopy of polonium [8]. The results of the analysis of the isotope shift and hyperne spectra of 217Po, obtained by the first in-LIST laser spectroscopy combined with precise scanning of the narrow bandwidth Ti:Sa laser, show how 217Po delineates the region of odd-even staggering reversal for the charge radii. To demonstrate the diverse applications of in-source laser spectroscopy at RIB facilities, we will conclude by presenting the high precision determination of the ionization energy of the polonium atom obtained from the ovserved Rydberg spectrum [8]. [1] V.N. Fedosseev et al., Rev. Sci. Instrum. 83, 02A903 (2012) [2] T.E. Cocolios et al., Phys. Rev. Lett., 106:052503 (2011) [3] M.D. Seliverstov et al., Phys. Lett. B 719, 362-366 (2013) [4] D.A. Fink et al., Nucl. Instrum. Meth. B 317, 417421 (2013) [5] R.E. Rossel et al., Nucl. Instrum. Meth. B 317, 557560 (2013) [6] S. Rothe et al., Nat. Commun. 4, 1835 (2013) [7] S. Rothe et al., Nucl. Instrum. Meth. B 317, 561564 (2013)
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