Physics – Optics
Scientific paper
2007-11-27
J. Phys. B: At. Mol. Opt. Phys. 41 051004 (2008)
Physics
Optics
8 pages, 5 figures
Scientific paper
10.1088/0953-4075/41/5/051004
We report on a tunable all-optical delay line for pulses with optical frequency within the Rb $D_2$ absorption line. Using frequency tuning between absorption components from different isotopes, pulses of 10 ns duration are delayed in a 10 cm hot vapour cell by up to 40 ns while the transmission remains above 10%. The use of two isotopes allows the delay to be increased or decreased by optical pumping with a second laser, producing rapid tuning over a range of more than 40% of the initial delay at 110$^{\circ}$C. We investigate the frequency and intensity ranges in which this delay line can be realised. Our observations are in good agreement with a numerical model of the system.
Akulshin Alexander M.
Hannaford Peter
McLean Russell J.
Sidorov Andrei I.
Vanner Michael R.
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