K. I. Gerasimov, T. N. Sabirov, S. A. Moiseev, E. I. Baibekov, M. Bettinelli, M. C. Chou, Y.-C. Yen, M. N. Popova, “Spectroscopy and photon echo at the Er$^{3+}$ transition with a small inhomogeneous broadening and telecommunication wavelength in a YPO$_4$ crystal”, Optics and Spectroscopy, 2023, Volume 131, Issue 5,Pages 648

The 18th International Theophilus Symposium (IFAC-2022) on Spectroscopy of Crystals Activated by Ions of Rare Earths and Transition Metals (August 22-26, 2022, Moscow)
Optical communication, optical information science, and optical computations

Spectroscopy and photon echo at the Er$^{3+}$ transition with a small inhomogeneous broadening and telecommunication wavelength in a YPO$_4$ crystal

K. I. Gerasimov^a, T. N. Sabirov^a, S. A. Moiseev^a, E. I. Baibekov^b, M. Bettinelli^c, M. C. Chou^d, Y.-C. Yen^d, M. N. Popova^e

^a Kazan Quantum Center, A. N. Tupolev Kazan National Research Technical University, 420111 Kazan, Russia
^b Kazan (Volga Region) Federal University, 420008 Kazan, Russia
^c Dipartimento di Biotecnologie, University of Verona and INSTM, 37134 Verona, Italy
^d Department of Materials and Optoelectronic Science, Center of Crystal Research, National Sun Yat-Sen University, 80424 Kaohsiung, Taiwan
^e Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, Moscow, Russia

Abstract: The results of investigations of Er$^{3+}$ ions at an optical transition with a telecommunication wavelength ($\lambda\sim$1530 nm) in a YPO$_4$ crystal by using photon echo and high-resolution laser spectroscopy in magnetic fields up to 4T are presented. The maximum coherence time $(T_2)$ was 113 $\mu$s in a magnetic field of 4T when it is oriented along the optical axis c of the crystal. The main sources of decoherence are discussed.

Keywords: YPO$_4$ : Er crystals, photon echo, high-resolution laser spectroscopy, magnetic field.

Received: 08.11.2022
Revised: 08.11.2022
Accepted: 06.12.2022

DOI: 10.21883/OS.2023.05.55717.69-22