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Spectrophone stabilized laser with line center offset frequency controlContinuous offset tuning of a frequency stabilized CW gas laser is achieved by using a spectrophone filled with the same gas as the laser for sensing a dither modulation, detecting a first or second derivative of the spectrophone output with a lock-in amplifier, the detected output of which is integrated, and applying the integrator output as a correction signal through a circuit which adds to the dither signal from an oscillator a dc offset that is adjusted with a potentiometer to a frequency offset from the absorption line center of the gas, but within the spectral linewidth of the gas. Tuning about that offset frequency is achieved by adding a dc value to the detected output of the dither modulation before integration using a potentiometer.
Document ID
19840014875
Acquisition Source
Legacy CDMS
Document Type
Other - Patent
Authors
Kavaya, M. J. (California Inst. of Tech. Pasadena, United States)
Menzies, R. T. (California Inst. of Tech. Pasadena, United States)
Date Acquired
September 4, 2013
Publication Date
February 28, 1984
Subject Category
Lasers And Masers
Accession Number
84N22943
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-4,434,490|NASA-CASE-NPO-15516-1
Patent Application
US-PATENT-APPL-SN-364126

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