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Proposed sum-and-difference method for optical-frequency measurement in the near infrared

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Abstract

We propose a method for the determination of optical frequencies in the near infrared that is based on the nonlinear generation of the optical sum and difference frequencies of two near-infrared lasers followed by the comparison of the sum and difference frequencies with standards in the visible and in the far infrared, respectively. We also address questions of practicability and discuss some examples open to the method.

© 1994 Optical Society of America

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