Observation and investigation of narrow optical transitions of 167Er3+ ions in femtosecond laser printed waveguides in 7LiYF4 crystal. (27th February 2018)

• Record Type: Journal Article
• Authors: Minnegaliev, M M; Dyakonov, I V; Gerasimov, K I; Kalinkin, A A; Kulik, S P; Moiseev, S A; Yu Saygin, M; Urmancheev, R V
• Is Part Of: Laser physics letters. Volume 15:Number 4(2018:Apr.)
• Publication Date: 2018-02-27
• Subjects: crystal waveguides -- rare-earth ions -- photon echo -- integrated quantum optics and quantum memory; Lasers -- Periodicals; Physics -- Periodicals; 621.366
• DOI: 10.1088/1612-202X/aaa6a6
• Languages: English
• ISSNs: 1612-2011

Abstract

Abstract: We produced optical waveguides in the 167 Er 3 + : 7 LiYF4 crystal with diameters ranging from 30 to 100 μ m by using the depressed-cladding approach with femtosecond laser. Stationary and coherent spectroscopy was performed on the 809 nm optical transitions between the hyperfine sublevels of 4 I15/2 and 4 I9/2 multiplets of 167 Er 3+ ions both inside and outside of waveguides. It was found that the spectra of 167 Er 3+ were slightly broadened and shifted inside the waveguides compared to the bulk crystal spectra. We managed to observe a two-pulse photon echo on this transition and determined phase relaxation times for each waveguide. The experimental results show that the created crystal waveguides doped by rare-earth ions can be used in optical quantum memory and integrated quantum schemes.