Initial measurements of focal ratio degradation in ZBLAN fluoride fibers for K band spectroscopy

Jacob Pember*, Simon Ellis, Tayyaba Zafar

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

Abstract

The applicability of optical fibers to astronomical spectroscopy in the infrared depends heavily on the fiber's wavelength-dependent transmission properties. Standard silica fibers typically allow transmission at wavelengths as red as 1550nm but absorb strongly at redder wavelengths, limiting their use for the infrared instruments. Fibers using fluoride glasses transmit redward of this range, opening up the infrared K band, corresponding to a window of transmission in the Earth's atmosphere. In order to further assess their feasibility for astronomical instrumentation, the characteristics of these fibers must be well-known. Here initial measurements and analysis of the focal ratio degradation (FRD) of two types of fluoride fibers are reported.

Original languageEnglish
Title of host publicationAdvances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV
EditorsRamón Navarro, Roland Geyl
Place of PublicationBellingham, Washington
PublisherSPIE
Pages1145121-1-1145121-8
Number of pages8
ISBN (Electronic)9781510636903
ISBN (Print)9781510636897
DOIs
Publication statusPublished - 13 Dec 2020
EventAdvances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV 2020 - Virtual, Online, United States
Duration: 14 Dec 202022 Dec 2020

Publication series

NameProceedings of SPIE
PublisherSPIE
Volume11451
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceAdvances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV 2020
CountryUnited States
CityVirtual, Online
Period14/12/2022/12/20

Keywords

  • fiber
  • focal ratio degradation
  • FRD
  • infrared
  • spectroscopy
  • uoride
  • ZBLAN

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