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Investigations of Repetition Rate Stability of a Mode-Locked Quantum Dot Semiconductor Laser in an Auxiliary Optical Fiber Cavity

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10 Author(s)
Stefan Breuer ; Inst. of Appl. Phys., Tech. Univ. Darmstadt, Darmstadt, Germany ; Wolfgang Elsasser ; John G. McInerney ; Kresten Yvind
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We have investigated experimentally the pulse train (mode beating) stability of a monolithic mode-locked multi-section quantum-dot laser with an added passive auxiliary optical fiber cavity. Addition of the weakly coupled (¿ -24 dB) cavity reduces the current-induced shift d¿/dI of the principal peak in the RF spectrum (the effective pulse repetition frequency) by more than an order of magnitude, from -39.5 to -2.3 kHz/mA. The rms timing jitter of the pulse train is simultaneously reduced from 1.4 to 0.9 ps.

Published in:

IEEE Journal of Quantum Electronics  (Volume:46 ,  Issue: 2 )