Related Experiment Video
Updated: Jul 6, 2026
Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
Published on: April 24, 2014
Low-frequency wavelength modulation spectroscopy with D2 transition of atomic cesium by use of an external-cavity
1Department of Electronics and Information Technology, Shanxi University, Taiyuan 030006, China. jiast@mail.sxu.edu.cn
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.
