Compact acousto-optic modulator operatingin the purely Raman - Nath diffraction regime as a phase modulator in FM spectroscopy

Journal Article · Tue Aug 03 00:00:00 EDT 2010 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE2010V040N05ABEH014074· OSTI ID:21471359

Baryshev, Vyacheslav N; Epikhin, V M ^[1]

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1. All-Russia Research Institute of Physicotechnical and Radio Measurements, State Scientific Center, Mendeleevo, Moscow region (Russian Federation)

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.

• OSTI ID: 21471359
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Vol. 40, Issue 5; Other Information: DOI: 10.1070/QE2010v040n05ABEH014074; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

46 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