Frequency stabilization apparatus for optical masers
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1. APPARATUS FOR DERIVING A DISCRIMINANT WHICH IS A MEASURE OF THE DIFFERENCE BETWEEN THE OUTPUT FREQUENCY OF A LASER AND A PREDETERMINED FREQUENCY WITHIN THE LASER EMISSION LINE COMPRISING IN COMBINATION FIRST MEANS FOR PARTIALLY ABSORBING A FIRST PORTION OF THE OUTPUT OF A LASER, SAID FIRST MEANS HAVING AN ABSORPTION PROFILE WITH A PEAK VALUE AT A FREQUENCY NEAR THE LASER EMISSION LINE AT A FREQUENCY LOWER THAN A PREDETERMINED FREQUENCY, SECOND MEANS FOR PARTIALLY ABSORB ING A SECOND PORTION OF THE OUTPUT OF THE LASER,
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1. APPARATUS FOR DERIVING A DISCRIMINANT WHICH IS A MEASURE OF THE DIFFERENCE BETWEEN THE OUTPUT FREQUENCY OF A LASER AND A PREDETERMINED FREQUENCY WITHIN THE LASER EMISSION LINE COMPRISING IN COMBINATION FIRST MEANS FOR PARTIALLY ABSORBING A FIRST PORTION OF THE OUTPUT OF A LASER, SAID FIRST MEANS HAVING AN ABSORPTION PROFILE WITH A PEAK VALUE AT A FREQUENCY NEAR THE LASER EMISSION LINE AT A FREQUENCY LOWER THAN A PREDETERMINED FREQUENCY, SECOND MEANS FOR PARTIALLY ABSORB ING A SECOND PORTION OF THE OUTPUT OF THE LASER,
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