Journal
OPTICS EXPRESS
Volume 23, Issue 5, Pages 6092-6101Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.23.006092
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Funding
- Science Foundation Ireland, Research Frontier Programme [11/RFP.1/PHY/3233]
- INSPIRE Postdoctoral Programme by the Irish Research Council for Science Engineering and Technology
- Marie Curie Programme (COFUND) under framework FP7
- Science Foundation Ireland (SFI) [11/RFP.1/PHY/3233] Funding Source: Science Foundation Ireland (SFI)
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The emission from a laser-induced plasma in ambient air, generated by a high power femtosecond laser, was utilized as pulsed incoherent broadband light source in the center of a quasi-confocal high finesse cavity. The time dependent spectra of the light leaking from the cavity was compared with those of the laser-induced plasma emission without the cavity. It was found that the light emission was sustained by the cavity despite the initially large optical losses of the laser-induced plasma in the cavity. The light sustained by the cavity was used to measure part of the S-1 <- S-0 absorption spectrum of gaseous azulene at its vapour pressure at room temperature in ambient air as well as the strongly forbidden gamma-band in molecular oxygen: b(1)Sigma(+)(g)(v' = 2) <- X-3 Sigma(-)(g)(v '' = 0). (C) 2015 Optical Society of America
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