THz optical pulses from a coupled-cavity quantum-dot laser

OPTICS COMMUNICATIONS

卷:285

Article

Liu, J.¹  Lu, Z. G.¹  Poole, P. J.¹  Barrios, P. J.¹  Poitras, D.¹  Jiao, Z.^1,2  Zhang, X. P.² 

[1] Natl Res Council Canada, Inst Microstruct Sci, Ottawa, ON K1A 0R6, Canada

[2] Concordia Univ, Dept Elect & Comp Engn, Montreal, PQ H3G 1M8, Canada

关键词: Quantum-dot laser;    Mode locking;    THz repetition rate;    Four-wave mixing;    Fiber Bragg grating;   

DOI  :  10.1016/j.optcom.2011.10.037

来源: Elsevier

【 摘 要 】

Optical pulses are generated from a coupled-cavity quantum-dot (QD) laser consisting of a short QD-waveguide Fabry-Perot (F-P) cavity and three long external fiber Bragg grating (FBG) cavities. When the laser is biased at low operation current, the feedback from the external cavities dominates and laser pulses have a 1.01 THz repetition rate, determined by the equal frequency difference of the three FBGs. We are thus able to decouple the repetition rate of a mode-locked laser from the cavity length. With much higher bias current, the QD F-P cavity dominates and the repetition rate is switched to 43.8 GHz, defined by the length of the F-P cavity. Crown Copyright (C) 2011 Published by Elsevier B.V. All rights reserved.

【 授权许可】

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