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Low-frequency wavelength modulation spectroscopy with D 2 transition of atomic cesium by use of an external-cavity diode laser

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Abstract

Low-frequency wavelength modulation spectroscopy is acquired with an external-cavity diode laser. The wavelength modulation is achieved with voltage tuning by means of scanning with the piezoelectric stepper motor, which rotates the end mirror in the laser cavity. With optimum 1-kHz frequency modulation and harmonic detection, direct absorption experiments for the 6S 1/2(F = 4) → 6P 3/2 transition of the cesium D 2 line were carried out. We found that 6f-harmonic detection is best here with a signal-to-noise voltage ratio of 460.

© 2000 Optical Society of America

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