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We report our progress towards the realization of a tunable and narrow-band source of correlated photons for coherent manipulation of cold atoms, using a combination of four-wave mixing and electromagnetically induced transparency.
Time-resolved mid-infrared pump-probe measurements in a quantum cascade laser operating above threshold reveal gain recovery dynamics to be two-fold: relaxation within a stage on a sub-picosecond scale and transport between stages on a picosecond scale.
Using a bi-frequency pumped Raman amplifier in a Rb vapor cell, we demonstrate experimentally the condition for achieving a null group index, necessary for fast-light enhanced rotation sensing in a passive cavity Sagnac gyroscope.
Slow and fast light are achieved using novel master-modulated injection-locked 1.55 mum VCSELs at room-temperature. We achieve a full RF phase change of 2pi at >10 GHz over a wide bandwidth ~8 GHz.
We report the first experimental characterization of the room temperature gain dynamics of InAs quantum dash optical amplifiers operating at wavelength of 1550 nm. A gain recovery time of 150 ps was observed.
The intracavity gain dynamics of an external cavity semiconductor mode-locked laser are measured, showing how pulses corresponding to different wavelengths are temporally skewed, leading to a slow gain depletion avoiding nonlinearities, which enables multiwavelength operation.
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