We demonstrate the stabilization of a laser diode frequency, using the circular dichroism of an alkali vapor and feeding back the correction signal to the temperature actuator of the junction. The conditions of operation and the performance of such a system are discussed.

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In this work we studied the behavior of bidirectionally-coupled time-delay electronic circuits. We observed that synchronization is stronger and more robust than in the unidirectional configuration. We were able to numerically reproduce the main observed synchronization behavior.