Bi-directional superluminal ring lasers without crosstalk and gain competition

Bi-directional superluminal ring lasers without crosstalk and gain competition

In this paper, we present the experimental observation of simultaneous bi-directional superluminal lasing in a triangular ring cavity without gain competition and crosstalk as needed for realizing a gyroscope based on the Sagnac effect. The gain spectrum for each of the lasers is tailored to be a na...

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Bibliographic Details
Published in:Applied physics letters Vol. 120; no. 25
Main Authors: Zhou, Zifan, Zhu, Ruoxi, Condon, Nicholas J., Hileman, Devin J., Bonacum, Jason, Shahriar, Selim M.
Format: Journal Article
Language:English
Published: Melville American Institute of Physics 20-06-2022
Subjects:
Absorption spectra
Applied physics
Competition
Crosstalk
Depletion
Ring lasers
Sagnac effect
Sensitivity enhancement
Spectral sensitivity
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Summary:In this paper, we present the experimental observation of simultaneous bi-directional superluminal lasing in a triangular ring cavity without gain competition and crosstalk as needed for realizing a gyroscope based on the Sagnac effect. The gain spectrum for each of the lasers is tailored to be a narrow dip on top of a broad gain using two stable isotopes of Rb. Specifically, we make use of 85Rb to produce a broad gain spectrum via the optically pumped Raman gain process and 87Rb to produce a narrow absorption spectrum via the optically pump Raman depletion process. A separate gain cell is used for the laser in each direction. Inferred from the simulation, the spectral sensitivity enhancements of the clock-wise and counter-clock-wise superluminal ring lasers are ∼362 and ∼505, respectively, with the imbalance attributed to differences in pump powers.
ISSN:0003-6951
1077-3118
DOI:10.1063/5.0093164