Highly-sensitive sonogram for assessment of chirp in semiconductor mode-locked lasers

Stolarz, P.M., Mezosi, G., Strain, M.J., Bryce, A.C. and Sorel, M. (2012) Highly-sensitive sonogram for assessment of chirp in semiconductor mode-locked lasers. IEEE Journal of Quantum Electronics, 48(8), pp. 995-1003. (doi:10.1109/JQE.2012.2196849)

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Abstract

We report on the detailed characterization of ultrashort pulses emitted from a 1.5- AlGaInAs/InP semiconductor passively mode-locked laser, operating at a repetition frequency of 35 GHz. Both the temporal and phase profiles of the pulses are retrieved using a sonogram technique that utilizes a highly-sensitive two-photon absorption waveguide detector. The system enables full characterization of pulses with energy as low as 10 fJ and peak power level of 5 mW, which is only inaccessible by a limited number of high-sensitivity measurement approaches. We show that the pulses exhibit a prevailing positive linear chirp across a wide range of biasing conditions. Its high sensitivity to the gain section current proves the dominant contribution of the gain conditions to the group delay characteristics of the emitted pulses.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Mezosi, Mr Gabor and Sorel, Professor Marc and Bryce, Prof Ann and Stolarz, Mr Piotr and Strain, Dr Michael
Authors: Stolarz, P.M., Mezosi, G., Strain, M.J., Bryce, A.C., and Sorel, M.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:IEEE Journal of Quantum Electronics
Publisher:IEEE
ISSN:0018-9197
Published Online:27 April 2012

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