Acousto-Optic–Based Wavelength-Comb-Swept Laser for Extended Displacement Measurements
AbstractWe demonstrate a novel wavelength-comb-swept laser based on two intra-cavity filters: an acousto-optic tunable filter (AOTF) and a Fabry-Pérot etalon filter. The AOTF is used for the tunable selection of the output wavelength with time and the etalon filter for the narrowing of the spectral linewidth to extend the coherence length. Compared to the conventional wavelength-swept laser, the acousto-optic–based wavelength-comb-swept laser (WCSL) can extend the measureable range of displacement measurements by decreasing the sensitivity roll-off of the point spread function. Because the AOTF contains no mechanical moving parts to select the output wavelength acousto-optically, the WCSL source has a high wavenumber (k) linearity of R2 = 0.9999 to ensure equally spaced wavelength combs in the wavenumber domain. View Full-Text
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Park, N.S.; Chun, S.K.; Han, G.-H.; Kim, C.-S. Acousto-Optic–Based Wavelength-Comb-Swept Laser for Extended Displacement Measurements. Sensors 2017, 17, 740.
Park NS, Chun SK, Han G-H, Kim C-S. Acousto-Optic–Based Wavelength-Comb-Swept Laser for Extended Displacement Measurements. Sensors. 2017; 17(4):740.Chicago/Turabian Style
Park, Nam S.; Chun, Soo K.; Han, Ga-Hee; Kim, Chang-Seok. 2017. "Acousto-Optic–Based Wavelength-Comb-Swept Laser for Extended Displacement Measurements." Sensors 17, no. 4: 740.
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