|Author||Baryshev, Vyacheslav N. ♦ Epikhin, V. M.|
|Source||United States Department of Energy Office of Scientific and Technical Information|
|Subject Keyword||INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY ♦ ABSORPTION ♦ CESIUM ♦ DESIGN ♦ DIFFRACTION ♦ DISPERSIONS ♦ FABRICATION ♦ FREQUENCY CONTROL ♦ FREQUENCY MODULATION ♦ IMPEDANCE ♦ LASERS ♦ RAMAN SPECTRA ♦ RESONANCE ♦ SPECTROSCOPY ♦ TRAPPING ♦ VAPORS ♦ ALKALI METALS ♦ COHERENT SCATTERING ♦ CONTROL ♦ ELEMENTS ♦ FLUIDS ♦ GASES ♦ METALS ♦ MODULATION ♦ SCATTERING ♦ SORPTION ♦ SPECTRA|
|Abstract||We report fabrication of a new acousto-optic modulator (AOM-RN) operating purely in the Raman - Nath diffraction regime. This device can be used as an external phase modulator in frequency-modulation (FM) optical heterodyne spectroscopy for fast and broadband frequency control of diode lasers. The AOM-RN design is significantly simplified, and its dimensions are minimised due to a decrease (by almost an order of magnitude in comparison with the existing AOMs) in the acousto-optic interaction length and the absence of impedance matching circuit. The FM spectroscopy based on AOM-RN makes it possible to analyse both absorption and dispersion properties of optical resonances under study; this possibility is shown by the example of saturated-absorption resonances in cesium vapour. The possibility of detecting coherent population trapping resonances using FM spectroscopy with AOM-RN as an external phase modulator is experimentally demonstrated.|
|Learning Resource Type||Article|
|Publisher Place||United States|
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