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Title: Phase-sensitive amplification of an optical field using microwaves
Authors: Karigowda, Asha
Adwaith, K V
Nayak, Pradosh K.
Sanders, Barry C
Bretenaker, Fabien
Narayanan, Andal
Sudha, S.
Issue Date: 28-Oct-2019
Publisher: Optical Society of America
Citation: Optics Express, 2019, Vol.27, p31110-32862
Abstract: We report phase-sensitive amplification (PSA) of a near-infrared electromagnetic field using room temperature 85Rb atoms possessing ground-state coherence. Our novelty is in achieving significant optical PSA by manipulating the intensity and phase of a frequency-separated microwave field. PSA is obtained by inducing a three-wave mixing nonlinear process utilising a three-level cyclic scheme in the D1 manifold. We achieve a near-ideal PSA with a gain of 7 dB over a range of 500 kHz bandwidth with very low pump-field intensities and with low optical depths. Such a hybrid, ground-state-coherence-assisted PSA is the first such demonstration using atomic ensembles.
Description: Open Access
ISSN: 1094-4087 (online)
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Copyright: 2019 Optical Society of America
Appears in Collections:Research Papers (LAMP)

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