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Development of IR single mode optical fibers for DARWIN-nulling interferometry

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Author: Chakkalakkal Abdulla, S.M. · Cheng, L.K. · Bosch, B. van den · Dijkhuizen, N. · Nieuwland, R.A. · Gielesen, W.L.M. · Lucas, J. · Boussard-Plédel, C. · Conseil, C. · Bureau, B. · Carmo, J.P. do
Type:article
Date:2014
Publisher: SciTePress
Source:2nd International Conference on Photonics, Optics and Laser Technology, PHOTOPTICS 2014, 7-9 January 2014, Lisbon, Portugal, 11-20
Identifier: 516477
ISBN: 9789897580086
Keywords: Electronics · Chalcogenide glass · Cross core scan · DARWIN · Far field intensity · Higher order mode suppression · Infrared · Nulling interferometry · Single mode fibers · TeAsSe fibers · TeGeGaI · High Tech Systems & Materials · Industrial Innovation · Physics & Electronics · OPT - Optics SSE - Space Systems Engineering · TS - Technical Sciences

Abstract

The DARWIN mission aims to detect weak infra-red emission lines from distant orbiting earth-like planets using nulling interferometry. This requires filtering of wavefront errors using single mode waveguides operating at a wavelength range of 6.5-20 μm. This article describes the optical design of the fibers, the manufacturing protocol, the packaging for operating at cryogenic environment and various optical characterisations performed. The latter includes investigation on the effect of gold and silver absorption coatings, anti-reflection coating, fiber length on higher order mode suppression and attenuation of the fibers.