Studying focal ratio degradation of optical fibers for Subaru's Prime Focus Spectrograph.

dos Santos, J.B.; de Oliveira, A.C.; Gunn, J.; de Oliveira, L.S.; Vital de Arruda, M.; Castilho, B.; Gneiding, C.D.; Ribeiro, F.F.; Murray, G.; Reiley, D.J.; Sodré Junior, L.; de Oliveira, C.M.

Abstract

Focal Ration Degradation (FRD) is a change in light’s angular distribution caused by fiber optics. FRD is important to fiber-fed, spectroscopic astronomical systems because it can cause loss of signal, degradation in spectral resolution, or increased complexity in spectrograph design. Laboratório Nacional de Astrofísica (LNA) has developed a system that can accurately and precisely measures FRD, using an absolute method that can also measure fiber throughput. This paper describes the metrology system and shows measurements of Polymicro’s fiber FBP129168190, FBP127165190 and Fujikura fiber 128170190. Although the FRD of the two fibers are low and similar to one another, it is very important to know the exact characteristics of these fibers since both will be used in the construction of FOCCoS (Fiber Optical Cable and Connectors System) for PFS (Prime Focus Spectrograph) to be installed at the Subaru telescope. © (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

Citation

dos Santos, J., de Oliveira, A., Gunn, J., de Oliveira, L., Vital de Arruda, M., Castilho, B., …de Oliveira, C. (2014). Studying focal ratio degradation of optical fibers for Subaru's Prime Focus Spectrograph. In R. Navarro, C. R. Cunningham, & A. A. Barto (Eds.), Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation. https://doi.org/10.1117/12.2056460

• Conference Name: Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation
• Conference Location: Montréal, Quebec
• Online Publication Date: Jul 28, 2014
• Publication Date: 2014-07
• Deposit Date: Mar 22, 2016
• Publisher: SPIE
• Volume: 9151
• Series Title: Proceedings of SPIE
• Series ISSN: 0277-786X
• Book Title: Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation
• ISBN: 9780819496195
• DOI: https://doi.org/10.1117/12.2056460
• Public URL: https://durham-repository.worktribe.com/output/1150698