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Note: Broadband cavity ring-down spectroscopy of an intra-cavity bulk sample
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View: Figures


Image of FIG. 1.
FIG. 1.

Scheme of a broadband CRD setup with pulsed Nd:YAG laser, photonic crystal fiber (PCF), two lenses (L1, L2), two high reflectivity mirrors and fiber coupling into a spectrograph with a time-gated intensified CCD camera

Image of FIG. 2.
FIG. 2.

(a) Spectrum of the broadband light source in the 480 nm to 650 nm range. (b) Normalized 3D plot of CRD signals of a measurement including an unirradiated CaF2 sample (every 15th measured trace plotted).

Image of FIG. 3.
FIG. 3.

Comparison of optical loss measurements V(λ)sample of CaF2; solid line: CRD with ACRD = 0.3 mm2; broken line: spectrometer with Aspectr. = 6.25 mm2. The step in the spectrometer trace originates from the light source change.

Image of FIG. 4.
FIG. 4.

Development of the optical loss V(λ)sample during ArF laser irradiation of the CaF2 sample (figures are numbers of laser pulses). 3D drawing of the CaF2 sample showing the ArF laser irradiated volume (rectangular) and the volume probed by the CRD measurement (cylindrical).

Image of FIG. 5.
FIG. 5.

Evolution of the optical loss change of the MNa band during ArF laser irradiation (figures are numbers of laser pulses); broken line: absorption band of MNa defect centers 11,12 (cf. Fig. 4 of Ref. 11 ); inset: increase of MNa absorption band amplitude with number NArF of ArF laser pulses fitted as exponential saturation.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Note: Broadband cavity ring-down spectroscopy of an intra-cavity bulk sample