Open AccessSpontaneous feedback for the simultaneous narrowing and elevation of fluorescence spectral lines
Author(s) -
ChengLiang Huang,
Xiangming Hu,
Qili Hu
Publication year - 2018
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.26.004807
Subject(s) - laser linewidth , spontaneous emission , optics , amplified spontaneous emission , intensity (physics) , fluorescence , physics , negative feedback , computer science , laser , quantum mechanics , voltage
Narrow linewidth and high intensity of the fluorescence spectra are two important elements to improve the accuracy and efficiency of related practical measurements, but so far they have not been achievable simultaneously. We propose a new approach to sharpen the linewidth and to heighten the intensity simultaneously. Rather than double coherent mechanisms, it uses the spontaneous emission of inverted atoms in a cavity below the threshold as a resource for feedback control. The spontaneous feedback is simpler in principle and easier to realize technologically, and represents a kind of new way of controlling spontaneous emission.