19 December 2013 Prospects for a four-level super-radiant laser with ultra-narrow linewidth at 1469 nm based on cesium
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Abstract
We propose a four-level superradiant laser system based on Cs at 1469 nm corresponding to the transition of 7S1/2 and 6P3/2 with a 459.3 nm pumping laser. With density matrix method, we calculate the relative population probabilities at each level theoretically. In a steady state, when the Rabi frequency is set to 3.5 MHz, 5.1% atoms are at 7S1/2 level while 1.9% at 6P3/2 level, which leads to the population inversion between the two levels. We design the experiment setup for the superradiant laser. In the steady state, the average photon number in the cavity is 1.1 × 106. According to the further calculation, the power of output superradiant laser is 0.17 mW and the laser linewidth is 17 Hz. This calculation method can also be used in the area of optical metrology.
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Yanfei Wang, Yanfei Wang, Caihong Dai, Caihong Dai, Zhifeng Wu, Zhifeng Wu, Xiangzhao Li, Xiangzhao Li, } "Prospects for a four-level super-radiant laser with ultra-narrow linewidth at 1469 nm based on cesium", Proc. SPIE 9046, 2013 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems, 90460J (19 December 2013); doi: 10.1117/12.2037222; https://doi.org/10.1117/12.2037222
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