Phase-sensitive amplification of an optical field using microwaves | Zendy

Asha Karigowda | Zendy; K. V. Adwaith | Zendy; Pradosh K. Nayak | Zendy; S. Sudha | Zendy; Barry C. Sanders | Zendy; Fabien Bretenaker | Zendy; Andal Narayanan | Zendy

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Phase-sensitive amplification of an optical field using microwaves

Author(s) -

Asha Karigowda,

K. V. Adwaith,

Pradosh K. Nayak,

S. Sudha,

Barry C. Sanders,

Fabien Bretenaker,

Andal Narayanan

Publication year - 2019

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.27.032111

Subject(s) - optics , microwave , atomic coherence , coherence (philosophical gambling strategy) , physics , polarization (electrochemistry) , phase (matter) , four wave mixing , nonlinear optics , laser , chemistry , quantum mechanics

We report phase-sensitive amplification (PSA) of a near-infrared electromagnetic field using room-temperature 85 Rb 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.

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