Optical imaging of hard and soft dental tissues using discretely swept OFDR-OCT

摘要

We have been developing a unique optical frequency domain reflectometry (OFDR)-OCT based on Mach-Zehnder interferometer using a discretly swept superstructure-grating distributed Bragg- reflector (SSG-DBR) lasers developed for telecommunication field. Our previous measurements at C-band wavelength (1529 to 1568 nm) revealed good quality of data. In this work, we extend measurements with a L-band (1560 to 1600 nm) SSG-DBR source at faster scanning speed of 0.5 μs/step compared with former 10 μs/step. In spite of the faster scanning, we can observe better quality of OCT images of hard and soft dental tissues in-vitro and in-vivo measurements.