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Frequency stabilization apparatus for optical masers

  • US 3,361,990 A
  • Filed: 06/22/1964
  • Issued: 01/02/1968
  • Est. Priority Date: 06/22/1964
  • Status: Expired due to Term
First Claim
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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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