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Proceedings Paper

Spectrally resolved pulse evolution in a mode-locked vertical-external-cavity surface-emitting laser from lasing onset measurements
Author(s): Andrew P. Turnbull; Christopher R. Head; Edward A. Shaw; Theo Chen-Sverre; Anne C. Tropper
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Paper Abstract

We present a study of the transient onset of lasing and ultrashort pulse formation in a 1-μm InGaAs/GaAs quantum well (QW) vertical-external-cavity surface-emitting laser (VECSEL) that is mode-locked using an intracavity semiconductor saturable absorber mirror. The intra-cavity power build-up transient is observed following modulation of the laser mode in the cavity. Measuring the rise of the frequency-doubled laser output with respect to the fundamental allows determination of mode-locking onset times and pulse-shortening per round trip. A grating monochromator has been used to resolve the optical spectrum of the fundamental intracavity radiation during pulse formation. Combining both measurements we can begin to provide a comprehensive description of pulse formation in VECSELs.

Paper Details

Date Published: 4 March 2015
PDF: 11 pages
Proc. SPIE 9349, Vertical External Cavity Surface Emitting Lasers (VECSELs) V, 93490I (4 March 2015); doi: 10.1117/12.2079292
Show Author Affiliations
Andrew P. Turnbull, Univ. of Southampton (United Kingdom)
Christopher R. Head, Univ. of Southampton (United Kingdom)
Edward A. Shaw, Univ. of Southampton (United Kingdom)
Theo Chen-Sverre, Univ. of Southampton (United Kingdom)
Anne C. Tropper, Univ. of Southampton (United Kingdom)


Published in SPIE Proceedings Vol. 9349:
Vertical External Cavity Surface Emitting Lasers (VECSELs) V
Mircea Guina, Editor(s)

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