The passive Fabry-Perot cavity is shown to be a good practical approach to the match-filter optimization for the sensitive detection of mode-locked laser signals. Doppler measurements of relative motion over a wide range of velocities are possible simply by measuring the cavity length for a peak output.
R. J. D’Orazio and Nicholas George, "Matched-Filter Detection of Mode-Locked Laser Signals," Appl. Opt. 12, 2367-2372 (1973)