Bi-directional superluminal ring lasers without crosstalk and gain competition

摘要

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 Rb-85 to produce a broad gain spectrum via the optically pumped Raman gain process and Rb-87 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. Published under an exclusive license by AIP Publishing.