Observation and investigation of narrow optical transitions of 167Er3+ ions in femtosecond laser printed waveguides in 7 LiYF4 crystalстатья
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Дата последнего поиска статьи во внешних источниках: 10 августа 2018 г.
Аннотация:We produced optical waveguides in the 167Er3+ :
7
LiYF4 crystal with diameters ranging from
30 to 100 μm 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 167Er3+ ions both inside and outside of
waveguides. It was found that the spectra of 167Er3+ 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.