Abstract
The emission frequency of a high-pressure waveguide CO2 laser was stabilized using resonances of saturated absorption of the P(14)CO2 line in 192OsO4. The heterodyne method was used to measure (to within 2×10−10) the relative frequency of a new strong resonance corresponding to the A22P(46) transition from the ground state of the 192OsO4 molecule. The measurements were made relative to a narrow resonance of 192OsO4 located near the center of the P(14)CO2 line profile and corresponding to a transition from an excited state. The precision of the measurements was probably limited by stray amplitude modulation resulting from misalignment of the laser resonator caused by the operation of a piezoelectric ceramic plate.
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