Observation of Q-switching and mode-locking in two-section InAs/InP (100) quantum dot lasers around 1.55 μm | Zendy

Martijn J. R. Heck | Zendy; E.A.J.M. Bente | Zendy; Barry Smalbrugge | Zendy; Yok-Siang Oei | Zendy; M.K. Smit | Zendy; S. Anantathanasarn | Zendy; R. Nötzel | Zendy

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Observation of Q-switching and mode-locking in two-section InAs/InP (100) quantum dot lasers around 1.55 μm

Author(s) -

Martijn J. R. Heck,

E.A.J.M. Bente,

Barry Smalbrugge,

Yok-Siang Oei,

M.K. Smit,

S. Anantathanasarn,

R. Nötzel

Publication year - 2007

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.15.016292

Subject(s) - laser , quantum dot laser , optics , photonics , optoelectronics , mode locking , semiconductor laser theory , oscilloscope , materials science , quantum dot , physics , detector

First observation of passive mode-locking in two-section quantum-dot lasers operating at wavelengths around 1.55 mum is reported. Pulse generation at 4.6 GHz from a 9 mm long device is verified by background-free autocorrelation, RF-spectra and real-time oscilloscope traces. The output pulses are stretched in time and heavily up-chirped with a value of 20 ps/nm, contrary to what is normally observed in passively mode-locked semiconductor lasers. The complete output spectrum is shown to be coherent over 10 nm. From a 7 mm long device Q-switching is observed over a large operating regime. The lasers have been realized using a fabrication technology that is compatible with further photonic integration. This makes the laser a promising candidate for e.g. a mode-comb generator in a complex photonic chip.

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