40-GHz and 160-GHz mode-locked quantum-dot laser showing pulse width of 750 fs at 1.3 µm

H. Schmeckebier; G. Fiol; C. Meuer; D. Arsenijević; D. Bimberg

doi:10.1117/12.854405

27 April 2010 40-GHz and 160-GHz mode-locked quantum-dot laser showing pulse width of 750 fs at 1.3 μm

H. Schmeckebier, G. Fiol, C. Meuer, D. Arsenijević, D. Bimberg

Author Affiliations +

Proceedings Volume 7720, Semiconductor Lasers and Laser Dynamics IV; 772010 (2010) https://doi.org/10.1117/12.854405
Event: SPIE Photonics Europe, 2010, Brussels, Belgium

Abstract

Based on frequency resolved optical gating, a pulse shape and phase characterization of a monolithic-two-section, quantum-dot mode-locked laser (QD-MLL) at 1.3 μm, at a repetition rate of 40 GHz, is presented. The dynamics of the absorber and the gain section are investigated in detail. Increasing the gain current leads to an increase of mostly linear chirp inducing significant pulse broadening. The absorber dynamics, namely the sweep out time of the carriers of the QDs, is enhanced at larger reverse biases. The quantum confined stark effect (QCSE) however reduces the absorber efficiency. Thus the shortest pulse width occurs for medium voltages. Pulses generated by hybrid mode locking are compared to passive mode-locked ones. Only a slight suppression of the trailing part of the pulses is found. Simulations as well as experiments demonstrate that the linear part of the chirp can be easily compensated leading to pulse compression. A pulse width of 700 fs is achieved almost independent of operating conditions. Temperature changes of 8°C leads to pulse broadening of a few hundred femtoseconds. Pulse combs up to 160 Gbit/s are generated using optical time division multiplexing (OTDM). Eye diagrams and autocorrelation measurements prove the suitability of our approach.

Citation Download Citation

H. Schmeckebier, G. Fiol, C. Meuer, D. Arsenijević, and D. Bimberg "40-GHz and 160-GHz mode-locked quantum-dot laser showing pulse width of 750 fs at 1.3 μm", Proc. SPIE 7720, Semiconductor Lasers and Laser Dynamics IV, 772010 (27 April 2010); https://doi.org/10.1117/12.854405

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