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Stabilization of a Laser Diode with an Intracavity Cesium Cell

The frequency of a laser diode (LD) with an intracavity cesium cell was stabilized optically by the nature of the atoms in the cell. The injection current and the position of the reflecting mirror were simultaneously controlled to maintain the optimum condition by modulating the injection current and using the phase sensitive detection. The experimental setup was simple and the linewidth became narrower than 100 kHz.