SYSTEM FOR ADJUSTING THE FREQUENCY OF A LASER BY DETECTING THE BEAT RESULTING FROM FREQUENCY INTERFERENCE WITH A REFERENCE LASER, FOR SPECTROSCOPY

摘要

P a) Frequency control system of a laser by detecting the beat resulting from frequency interference with a reference laser for spectroscopy. / P P b) The system is characterized in that it comprises a first tunable laser for producing a laser beam with an adjustable frequency f1, a second reference laser for producing a laser beam with a reference frequency f2, detector means for forming a frequency difference by detecting the beat resulting from the interference of said first and said second frequencies, and a phase lock control loop digital control means responsive to said frequency difference for adjusting the output signal of said tunable laser means to a control signal. predetermined frequency output. / P P c) The system of the invention can be used in spectroscopy for isotopic laser separation, in diagnostics relating to atomic vapor, in the treatment of precise deviations of laser frequency from a reference frequency, and similar applications. / P