Time-resolved relaxation oscillations in gain-clamped semiconductor optical amplifiers by pump and probe measurements
- Hessler, T.
- Haacke, S.
- Pleumeekers, J. L.
- Selbmann, P. E.
- Dupertuis, M. A.
- Deveaud, B.
- Taylor, R. A.
- Doussiere, P.
- Bachmann, M.
- Ducellier, T.
- Emery, J. Y.
DOIAbstract
Pump and probe measurements with femtosecond resolution are performed on a gain-clamped semiconductor optical amplifier, a structure that contains a lasing mode. The corresponding relaxation oscillations are observed in the temporal gain recovery of the amplifier. The current dependence of the oscillations is well reproduced by a small-signal analysis of the laser rate equations. The gain recovery can be very fast, we measure damping rates of up to 40 GHz
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