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Transfer of Raman-Scattered Light from Gases by Fiber Optics

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In the focus of the argon-ion ring laser of our cw CARS spectrometer, a power of over 100 W is available at 514.5 nm. It has been used here for the excitation of linear Raman spectra of gases. The collected 90° scattering is transferred to the entrance slit of a double monochromator by ordered fiber-optic bundles with slit-like cross sections. The transfer efficiency varies with the slitwidth used; values between 13% and 23% have been achieved. The recorded spectra of nitrogen and air compare favorably with those obtained with conventional extra-cavity single-pass excitation.

Keywords: Fiber optics; Gases; Raman

Document Type: Research Article


Affiliations: 1: Sektion Physik der LMU München, Schellingstrasse 4, D-8000 München 40, Federal Republic of Germany 2: Fa. MicroQuartz, Kistlerhofstrasse 243, D-8000 München 70, Federal Republic of Germany

Publication date: May 1, 1990

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