Laser frequency stabilization using bichromatic crossover spectroscopy

We propose a Doppler-free spectroscopic method named bichromatic crossover spectroscopy (BCS), which we then use for the frequency stabilization of an off-resonant frequency that does not correspond to an atomic transition. The observed BCS in the 5S1/2 → 5P1/2 transition of 87Rb is related to the h...

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Published in:Journal of applied physics 2015-03, Vol.117 (9)
Main Authors: Jeong, Taek, Seb Moon, Han
Format: Article
Language:English
Subjects:
ABSORPTION SPECTRA
Applied physics
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Crossovers
ENERGY-LEVEL TRANSITIONS
Frequency stability
Frequency stabilization
HYPERFINE STRUCTURE
LASER RADIATION
MODULATION
P STATES
POLARIZATION
Resonant frequencies
ROTATION
RUBIDIUM 87
S STATES
Spectroscopy
Spectrum analysis
STABILIZATION
VAPORS
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Seb Moon, Han
description We propose a Doppler-free spectroscopic method named bichromatic crossover spectroscopy (BCS), which we then use for the frequency stabilization of an off-resonant frequency that does not correspond to an atomic transition. The observed BCS in the 5S1/2 → 5P1/2 transition of 87Rb is related to the hyperfine structure of the conventional saturated absorption spectrum of this transition. Furthermore, the Doppler-free BCS is numerically calculated by considering all of the degenerate magnetic sublevels of the 5S1/2 → 5P1/2 transition in an atomic vapor cell, and is found to be in good agreement with the experimental results. Finally, we successfully achieve modulation-free off-resonant locking at the center frequency between the two 5S1/2(F = 1 and 2) → 5P1/2(F′ = 1) transitions using a polarization rotation of the BCS. The laser frequency stability was estimated to be the Allan variance of 2.1 × 10−10 at 1 s.
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The observed BCS in the 5S1/2 → 5P1/2 transition of 87Rb is related to the hyperfine structure of the conventional saturated absorption spectrum of this transition. Furthermore, the Doppler-free BCS is numerically calculated by considering all of the degenerate magnetic sublevels of the 5S1/2 → 5P1/2 transition in an atomic vapor cell, and is found to be in good agreement with the experimental results. Finally, we successfully achieve modulation-free off-resonant locking at the center frequency between the two 5S1/2(F = 1 and 2) → 5P1/2(F′ = 1) transitions using a polarization rotation of the BCS. 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source American Institute of Physics:Jisc Collections:Transitional Journals Agreement 2021-23 (Reading list)
subjects ABSORPTION SPECTRA
Applied physics
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Crossovers
ENERGY-LEVEL TRANSITIONS
Frequency stability
Frequency stabilization
HYPERFINE STRUCTURE
LASER RADIATION
MODULATION
P STATES
POLARIZATION
Resonant frequencies
ROTATION
RUBIDIUM 87
S STATES
Spectroscopy
Spectrum analysis
STABILIZATION
VAPORS
title Laser frequency stabilization using bichromatic crossover spectroscopy
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