High-accuracy length measurement using high-frequency repetitions of a mode-locked fiber laser (5th report)

CMM performance verification using 5-GHz repetition frequency

Abstract

We developed a Fabry-Pérot etalon (FPE) to select high-frequency parts of repetition-frequency modes of a short pulsed, mode-locked fiber laser in the wavelength of 1.55 μm. The 5-GHz repetition-modified laser is transmitted to a fiber-type interferometer. The generated interference fringes have a temporal coherence interference fringe pattern at each 30 mm of CMM′s movement and can make positioning in space. The performance of CMM can be verified by comparing with interference fringes directly.