Frequency Stabilization of AlGaAs Semiconductor Laser Based on the 85Rb-D2 Line

Abstract
The frequency of an AlGaAs semiconductor laser was stabilized by using the linear absorption spectrum of the 85Rb-D2 line. By controlling the injection current, the frequency stability of 3.0×10-10≧σ≧1.4×10-12 was obtained for 10 ms≦τ≦500 s. First observation of the saturated absorption spectrum of the 85Rb-D2 line is demonstrated, which can be used as a frequency reference to improve the frequency stability.
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