Quantum fluctuations in laser with intracavity frequency doubling
Abstract
A source of light with minimal quantum fluctuations of intensity for ultrasensitive laser spectroscopy is considered; namely, one consisting of an active lasing medium and a frequencydoubling nonlinear crystal inside a common cavity. The ability of such a device to generate simultaneously compressed fundamental and secondharmonic radiation or, under the appropriate optimum condition, only secondharmonic radiation is demonstrated theoretically on the basis of a semiclassical description of the process by a system of two differential equations. Two successive integrations by parts solve this system of equations in the zeroth and then first approximation. A subsequent quantumelectronic description of this device and analysis of its statistical characteristics on the basis of the FokkerPlank equation indicate the feasibility of attenuating shot noise in the lowfrequency range of the radiation power spectrum and thus, in emission of fundamental radiation.
 Publication:

JPRS Report Science Technology USSR Space
 Pub Date:
 October 1990
 Bibcode:
 1990RpScT........3Z
 Keywords:

 Acoustic Attenuation;
 Fluctuation Theory;
 Frequency Multipliers;
 Laser Cavities;
 Laser Outputs;
 Laser Spectroscopy;
 Quantum Theory;
 Shot Noise;
 Long Wave Radiation;
 Low Frequencies;
 Noise Reduction;
 Lasers and Masers