A nonincremental interferometer is shown in which the dynamical spectral filtering of a superluminescent source induces a broadband sinusoidal frequency modulation. The method reaches very high resolution limits in distance measurements (a theoretical expectation of 10-12 m/√Hz is obtained) while maintaining all the advantages of heterodyne phase-recovery processing. Comparison with other nonincremental interferometric approaches is given.
© 1991 Optical Society of America
Valeria Gusmeroli and Mario Martinelli, "High-resolution distance measurement by dynamical spectral filtering of a superluminescent source," Opt. Lett. 16, 1195-1197 (1991)