GaAlAs laser diode frequency locked at the D_2 line of Cs atoms in an atomic beam

A GaAlAs laser diode has been locked to the D(2)transition of Cs atoms in an atomic beam. Measured frequency stabilities are 1 x 10(-10) (0.1 sec), 8.4 x 10(-12) (1 sec), 2.2 x 10(-12) (10 sec), and 7.8 x 10(-13) (100 sec). This system has been successfully applied to an optically pumped Cs-beam frequency standard.