Calibration of silica fibers for the Optical Hawaiian Array for Nanoradian Astronomy (‘OHANA): Temperature dependence of differential chromatic dispersion

摘要: Abstract In the frame of Optical Hawaiian Array for Nanoradian Astronomy (‘OHANA) project, 300-m long silica fibers are necessary to coherently link Canada–France–Hawaii and Gemini telescopes. this paper, we report measurements differential chromatic dispersion between two polarization maintaining astronomical J band (1.10–1.40 μm) as a function temperature variation on one fiber arm interferometer. We demonstrate that second order coefficient increases linearly with temperature. Consequently, propose methods compensate additional variable dispersion: first using dispersive optical delay line set CaF 2 bulk plates.