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Appl Opt. 2004 Jul 20;43(21):4189-98.

Analysis of optical frequency-modulated continuous-wave interference.

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  • 1PhotonTech, 1980 E 51 Avenue, Vancouver, British Columbia V5P1V9, Canada.


I systematically analyze the theory of optical frequency-modulated continuous-wave (FMCW) interference. There are three different versions of optical FMCW interference, discussed in detail: sawtooth-wave optical FMCW interference, triangular-wave optical FMCW interference, and sinusoidal-wave optical FMCW interference. The essential concepts and technical terms are clearly defined, the necessary simplifications are introduced according to the characteristics of optical waves, and the formulas used to calculate the signal intensities under two different situations (static and dynamic) are properly derived. Advantages and limitations of each version of optical FMCW interference are also discussed.

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