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

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...

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Bibliographic Details
Published inApplied physics letters Vol. 96; no. 5; pp. 051118 - 051118-3
Main Authors Lin, C.-Y., Grillot, F., Naderi, N. A., Li, Y., Lester, L. F.
Format Journal Article
LanguageEnglish
Published American Institute of Physics 01.02.2010
Subjects
Engineering Sciences
Optics
Photonic
Physics
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Summary: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 multiple of the laser cavity length validates the prediction of a previous numerical simulation. It is also confirmed that the integrated rms timing jitter varies as the square root of the rf linewidth. The results are promising for the development of compact, monolithic semiconductor mode-locked lasers as low noise optoelectronic oscillators.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3299714