Journal
OPTICS EXPRESS
Volume 25, Issue 22, Pages 27464-27474Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.25.027464
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Funding
- Science Foundation Ireland (SFI) [11/PI/1152, IPIC 12/RC/2276]
- European Union (EU) FP7 Marie Curie Action FP7-PEOPLE-ITN through the PROPHET project [264687]
- Science Foundation Ireland (SFI) [11/PI/1152] Funding Source: Science Foundation Ireland (SFI)
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A time-resolved study is presented of the single-mode and mode-switching dynamics observed in swept source vertical cavity surfing emitting lasers and swept wavelength short external cavity lasers. A self-delayed interferometric technique is used to experimentally measure the phase and intensity of these frequency swept lasers, allowing direct examination of the modal dynamics. Visualisation of the instantaneous optical spectrum reveals mode-hop free single mode lasing in the case of the vertical cavity laser, with a tuning rate of 6.3 GHz/ns. More complex mode-switching behaviour occurs in the external cavity laser, with the mode-hopping dynamics found to be dominated by the deterministic movement of the spectral filter. Evidence of transient multi-mode operation and mode-pulling is also presented. (C) 2017 Optical Society of America
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