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Passively mode-locked lasers with integrated chirped Bragg grating reflectors

Strain, Michael John and Stolarz, Piotr M and Sorel, Marc (2011) Passively mode-locked lasers with integrated chirped Bragg grating reflectors. IEEE Journal of Quantum Electronics, 47 (4). pp. 492-499. ISSN 0018-9197

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Abstract

Passively mode-locked laser devices are presented incorporating chirped distributed Bragg reflectors. The Bragg grating sections consist of post-growth, sidewall relief, tapered gratings, offering continuous chirp and modulation of the coupling coefficient. Blue-chirped gratings are found to compensate for the pulse chirp accumulated in the laser gain and absorption sections. Pulses are measured with the largest 3 dB bandwidths, up to 2.3 nm, and smallest pulsewidths, 1.49 ps, achieved in passively mode-locked DBR lasers.