Spectrally resolved pulse evolution in a mode-locked vertical-external-cavity surface-emitting laser from lasing onset measurements

Andrew P. Turnbull; Christopher R. Head; Edward A. Shaw; Theo Chen-Sverre; Anne C. Tropper

doi:10.1117/12.2079292

4 March 2015 Spectrally resolved pulse evolution in a mode-locked vertical-external-cavity surface-emitting laser from lasing onset measurements

Andrew P. Turnbull, Christopher R. Head, Edward A. Shaw, Theo Chen-Sverre, Anne C. Tropper

Author Affiliations +

Proceedings Volume 9349, Vertical External Cavity Surface Emitting Lasers (VECSELs) V; 93490I (2015) https://doi.org/10.1117/12.2079292
Event: SPIE LASE, 2015, San Francisco, California, United States

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.

Citation Download Citation

Andrew P. Turnbull, Christopher R. Head, Edward A. Shaw, Theo Chen-Sverre, and Anne C. Tropper "Spectrally resolved pulse evolution in a mode-locked vertical-external-cavity surface-emitting laser from lasing onset measurements", Proc. SPIE 9349, Vertical External Cavity Surface Emitting Lasers (VECSELs) V, 93490I (4 March 2015); https://doi.org/10.1117/12.2079292

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