The work presents a measurement of lengths by an optical measuring resonator. The resonator works as distance-to-optical
frequency converter with ultimate linearity. It has locked a tunable laser to certain cavity mode. The optical
frequency of the laser is heterodyned with immediate “tooth” of the femtosecond comb spectrum. For the testing of the
method the special combination of the optical resonator and Michelson interferometer was put together. This system
combines the cavity length of the optical resonator with the measuring arm of the Michelson laser interferometer. The
one mirror of the system is common for both laser interferometers and it is driven by piezoelectric transducer. The
testing range is limited by the range of tuneability of the used laser and it covers 1000 nm of the length measurement.
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O. Číp ; M. Čížek ; Z. Buchta ; B. Mikel ; Josef Lazar, et al.
High-resolution detection of small distance changes by an optical frequency comb
", Proc. SPIE 8697, 18th Czech-Polish-Slovak Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 86970G (December 18, 2012); doi:10.1117/12.2012651; http://dx.doi.org/10.1117/12.2012651