24 September 2004 All-silica fiber with low or medium OH-content for broadband applications in astronomy
Author Affiliations +
Abstract
For astronomical applications, different types of step-index all-silica fibers with high-transparency in the whole spectral region from UV (300 nm) to NIR (1100 nm) will be introduced. The light-guiding core-material consists of high-purity silica, especially with low or medium OH-content. In UV region, the losses are mainly influenced by Rayleigh scattering, while the losses in the IR region are limited by traces of OH-groups (in the order of approx. 2 ppm) and fundamental vibration-bands. Due to processing, typical UV-defects below 280 nm can be suppressed significantly within fibers with medium or low OH-content. Especially, one fiber-type with low-OH content in the core possess high resistance against UV radiation in the DUV-region down to 200 nm, which is comparable to high-OH all-silica fibers specially developed for UV-application below 250 nm. In addition, a medium-OH will be presented. The properties of these new fibers in respect to basic attenuation and spectral damage in the UV-region will be discussed, in comparison to high-OH fibers, based on the same measurement-technique. In addition, first results on focal ratio degradation (FRD) and additional loss related to higher propagation angles will be shown, in comparison to standard high-OH fibers.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Saleh Ferwana, Saleh Ferwana, Hanns-Simon Eckhardt, Hanns-Simon Eckhardt, Thorsten Simon, Thorsten Simon, Karl-Friedrich Klein, Karl-Friedrich Klein, Roger Haynes, Roger Haynes, Valery Kh. Khalilov, Valery Kh. Khalilov, Gary W. Nelson, Gary W. Nelson, } "All-silica fiber with low or medium OH-content for broadband applications in astronomy", Proc. SPIE 5494, Optical Fabrication, Metrology, and Material Advancements for Telescopes, (24 September 2004); doi: 10.1117/12.568231; https://doi.org/10.1117/12.568231
PROCEEDINGS
12 PAGES


SHARE
RELATED CONTENT

Radiation hardening of FBG in harsh environments
Proceedings of SPIE (June 01 2014)
Fiber optic systems in the UV region
Proceedings of SPIE (May 02 2000)
High-OH fibers with higher stability in the UV-region
Proceedings of SPIE (February 14 2006)
Quality control of UV resistant fibers for 200 300 nm...
Proceedings of SPIE (February 18 2008)
Monitoring by fiber optic Raman spectroscopy
Proceedings of SPIE (April 30 1992)

Back to Top