NOISE CONSIDERATION FOR THE DETECTION OF WEAK LASER SIGNALS.
Interim rept. 1 Mar-1 Jun 66,
RCA VICTOR CO LTD MONTREAL (QUEBEC) RESEARCH LABS
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A study is made of the minimum laser signal that can be detected when it is embedded in a background of black body radiation and other sources of noise. In particular, the laser source is assumed to be modulated and a phase lock or pulse coincidence amplifier to be employed. General expressions are derived for the signal-to-noise ratio at the output of a phase lock or pulse amplifier for a signal immersed in noise. The types of modulation that are examined comprise sinusoidal, square wave and pulse modulation. The noise considered is that arising from black body and Bremsstrahlung radiation, thermal noise, generation, recombination noise etc.. In particular, laser noise is discussed in some detail. Finally, a Thomson scattering experiment is considered as a special case. Author
- Lasers and Masers
- Plasma Physics and Magnetohydrodynamics