rf linewidth reduction in a quantum dot passively mode-locked laser subject to external optical feedback

C.-Y. Lin, F. Grillot, N. A. Naderi, Y. Li, and L. F. Lester
The effect of external optical feedback on an InAs/GaAs quantum dot passively mode-locked laser is investigated. The rf linewidth narrows from 8 KHz in the free-running situation to a value as low as 350 Hz under relatively low feedback. The rf linewidth characterization under resonant feedback at a ... [Appl. Phys. Lett. 96, 051118 (2010)] published Thu Feb 4, 2010.
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