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Conferences > ECBO > 2019 > PSW11078 > 11078_67
  • Optical Coherence Imaging Techniques and Imaging in Scattering Media III
  • SPIE Proceedings (Optica Publishing Group, 2019),
  • paper 11078_67
  • •https://doi.org/10.1117/12.2526914

Dual-band wavelength-comb-swept laser to extend displacement measurement range

Seongjin Bak, Gyeong Hun Kim, and Chang-Seok Kim

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Abstract

We demonstrate dual-band wavelength-comb-swept laser for solving the aliasing interferometer signal in displacement measurement. Wavelength-comb-swept laser with etalon filter has longer coherence length and narrower linewidth than conventional wavelength-swept laser. On the other hand, aliasing of interferometer signal in displacement measurement is induced because of discrete distribution of comb spectra in wavelength domain. By using the dual-band wavelength-comb-swept-laser which has two different free spectral range (FSR) comb in each band, aliasing interferometer signal can be solved.

© 2019 SPIE/OSA

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