Abstract
Either single- or multi-mode emission from a diode laser coupled to an external cavity containing a cell filled with caesium vapour has been observed. The oscillation frequency of each operating mode of the laser is locked to a hyperfine transition or crossover resonance of the saturated absorption spectrum of the caesium line. A model based on the rate equations for external-feedback diode lasers, modified in order to include frequency-dependent losses and dispersion of the laser field through the atomic absorber, has been developed. We show that the atomic absorption resonances determine the lasing frequencies. A multi-stable behaviour is obtained.
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Schedule a callMore From: Quantum and Semiclassical Optics: Journal of the European Optical Society Part B
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