Abstract
Transient holes were burnt and probed with microsecond resolution in the5D0↔7F0 transition of Eu3+ doped in a silicate glass fiber. The holes are due to population storage in the5D0 excited state for delays of microseconds, and to optical pumping of nuclear quadrupole levels for delays of seconds. Side- and anti-holes were observed. The corresponding nuclear quadrupole splittings vary strongly with excitation wavelength. Spectral diffusion was found between μs and s. The temperature and wavelength dependence of hole widths was determined.
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