Noise-modulated laser diode interferometer and its application to range finding

Wolfgang Holzapfel; Werner Baetz; Jan Christian Braasch

doi:10.1117/12.172582

1 March 1994 Noise-modulated laser diode interferometer and its application to range finding

Wolfgang Holzapfel, Werner Baetz, Jan Christian Braasch

Proceedings Volume 2004, Interferometry VI: Applications; (1994) https://doi.org/10.1117/12.172582
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

Theory, experimental performance, and application of the noise-modulated interferometer are presented. This novel two-beam interferometer applies (1st) a laser diode source that is stochastically modulated in its frequency and (2nd) a common photodetector in the output arm followed by an averaging frequency counter. It is demonstrated that homodyne detecting of the two interferometer beams and counting the averaged beat frequency can be understood as a correlation process. By applying Horton's Anticorrelation' function to the signal processing channel of the noise-modulated interferometer, the range R <EQ 2 m of reflecting target is determined with high precision.

Citation Download Citation

Wolfgang Holzapfel, Werner Baetz, and Jan Christian Braasch "Noise-modulated laser diode interferometer and its application to range finding", Proc. SPIE 2004, Interferometry VI: Applications, (1 March 1994); https://doi.org/10.1117/12.172582

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