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 dualwavelength 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 27mW have been achieved for the 1310 and 1550nm bands, respectively, while the two wavelengths were swept simultaneously from 1227 to 1387nm for the 1310nm band and from 1519 to 1581nm for the 1550nm 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 GRINlensed fiber probe to form dual-band common-path SS-OCT. Simultaneous OCT imaging at 1310 and 1550nm is achieved. This technique allows for in vivo high-speed OCT imaging with potential application in functional (spectroscopic) investigations
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