title: Simultaneous dual-wavelength-band common-path swept-source optical coherence tomography with single polygon mirror scanner.
abstract: We report a novel (to the best of our knowledge) simultaneous 1310/1550 two-wavelength band swept laser source and dual-band common-path swept-source optical coherence tomography (SS-OCT). Synchronized dual-wavelength tuning is performed by using two laser cavities and narrowband wavelength filters with a single dual-window polygonal scanner. Measured average output powers of 60 and 27 mW have been achieved for the 1310 and 1550 nm bands, respectively, while the two wavelengths were swept simultaneously from 1227 to 1387 nm for the 1310 nm band and from 1519 to 1581 nm for the 1550 nm band at an A-scan rate of 65 kHz. Broadband wavelength-division multiplexing is used for coupling two wavelengths into a common-path single-mode GRIN-lensed fiber probe to form dual-band common-path SS-OCT. Simultaneous OCT imaging at 1310 and 1550 nm is achieved. This technique allows for in vivo high-speed OCT imaging with potential application in functional (spectroscopic) investigations.
authors.affiliation: Institute for Microstructural Sciences, National Research Council Canada, 1200 Montreal Road, Ottawa, ON K1A 0R6, Canada. linda.mao@nrc‐cnrc.gc.ca
authors.forename: Youxin
authors.initials: Y
authors.lastname: Mao
authors.forename: Shoude
authors.initials: S
authors.lastname: Chang
authors.forename: Erroll
authors.initials: E
authors.lastname: Murdock
authors.forename: Costel
authors.initials: C
authors.lastname: Flueraru
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007909:Lenses; D055617:Micro-Electrical-Mechanical Systems / Q000295:instrumentation*; D041623:Tomography, Optical Coherence / Q000295:instrumentation*; D014159:Transducers