Patent ID: 6172570
Filing Date: 2001-01-09
Classification: G04F,H03L

Abstract:
A laser light atomic frequency standard, comprising:a transparent cell containing an atomic glass excitable at an atomic resonance frequency;means for forming a non-uniform frequency-modulated microwave field in the transparent cell, said frequency-modulated microwave field having a first region of higher field intensity and a second region of lower field intensity in the atomic gas in the gas cell;a laser light source directed through the transparent cell;two photo detectors located to receive the laser light directed through the transparent cell, the first photo detector being located to receive laser light directed through said first region for generation of a first signal output and the second photo detector being located to receive laser light directed through said second region for generation of a second signal output; andmeans for combining said first signal output and second signal output for cancellation of noise generated in the light transmitted through said atomic gas.