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 frequency-doubling nonlinear crystal inside a common cavity. The ability of such a device to generate simultaneously compressed fundamental and second-harmonic radiation or, under the appropriate optimum condition, only second-harmonic 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 quantum-electronic description of this device and analysis of its statistical characteristics on the basis of the Fokker-Plank equation indicate the feasibility of attenuating shot noise in the low-frequency 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