Saturated gain spectrum of VECSELs determined by transient measurement of lasing onset

C. Robin Head (Lead / Corresponding author), Keith G. Wilcox, Andrew P. Turnbull, Oliver J. Morris, Edward A. Shaw, Anne C. Tropper

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)
330 Downloads (Pure)


We describe time-resolved measurements of the evolution of the spectrum of radiation emitted by an optically-pumped continuous-wave InGaAs-GaAs quantum well laser, recorded as lasing builds up from noise to steady state. We extract a fitting parameter corresponding to the gain dispersion of the parabolic spectrum equal to 79 30 fs2 and 36 6 fs2 for a resonant and anti-resonant structure, respectively. Furthermore the recorded evolution of the spectrum allows for the calculation of an effective FWHM gain bandwidth for each structure, of 11 nm and 18 nm, respectively.

This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.

Original languageEnglish
Pages (from-to)6919-6924
Number of pages6
JournalOptics Express
Issue number6
Early online date18 Mar 2014
Publication statusPublished - 24 Mar 2014


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