Abstract

An optical frequency comb is considered as an ultra-broad band light source consisting thousands of monochromatic phase-locked wavelengths, so it can be used as an ultra-broadband low-temporal coherence light source to achieve the profile of an object by employing a conventional interferometry technique. Particularly, in the previous research, we have proposed a system based on a Michelson interferometer worked as a chromatic phase shifter. The proposed system was considered as a frequency selection, which can be used to observe the phase information of the specific wave in a temporal low-coherent light source, relatively the object profile with root mean square (RMS) error hundred times smaller than optical wavelength can be achieved. [1] Moreover, it overcomes conventional light source, the link between an optical frequency and a radio frequency (RF) of the optical frequency has been recognized. Using an appropriate frequency selection module, the interference signal of a specific frequency in radio frequency domain can be achieved. And in our other previous researches, a system, which allowed obtaining the interference signal of a specific frequency in radio frequency domain, has been also proposed to determine the profile of an object with micro-order accuracy. [2]

© 2015 Japan Society of Applied Physics, Optical Society of America