HORIBA:Technical information No E11 Applications of Laser Spectroscopy to Highly Sensitive Analyses

No.E11 Guest page 26-31

Applications of Laser Spectroscopy to Highly Sensitive Analyses — Cavity Ring-Down Spectroscopy —

Masahiro Kawasaki
Kyoto University Graduate School of Engineering Professor Doctor of Science

(1453 k)

[Abstract]

Laser has been widely used for analysis of various molecules because laser has a variety of features from continuous-wave oscillation to ultra-short pulse. While introducing some examples of applications of lasers from vacuum-ultraviolet to near infrared region, Analysis techniques by laser-induced fluorescence (LIF) spectroscopy and photo-acoustic spectroscopy (PAS) with a pulsed dye laser are explained. Applications of cavity ring-down spectroscopy (CRDS) with a semiconductor laser are compared with LIF and PAS. Then, as an advanced analytical technique, fi ber-CRDS with Bragg gratings and a gain-switch semiconductor laser is discussed. CRDS with an evanescent light device or an onboard waveguide is explained as future prospects.

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