Increasing the noise immunity of the homodyne reception of an optical signal in the atmosphere
Abstract
It is demonstrated that, in order to increase the SNR and decrease signal fading due to atmospheric turbulence, it is sufficient to receive at least the first two harmonics of the signal in the case of angular modulation of the optical carrier. This result is confirmed by an experiment involving the homodyne reception of IR CO2-laser signals at a wavelength of 10.6 microns on an atmospheric path 200 m long; measurements were made for signal powers of 0.4 W and 30 mW.
- Publication:
-
Radiotekhnika i Elektronika
- Pub Date:
- June 1986
- Bibcode:
- 1986RaEl...31.1174A
- Keywords:
-
- Atmospheric Optics;
- Homodyne Reception;
- Optical Communication;
- Signal To Noise Ratios;
- Carbon Dioxide Lasers;
- Harmonic Analysis;
- Infrared Lasers;
- Signal Fading;
- Turbulence Effects;
- Optics