Investigation of focal ratio degradation caused by stress in large-core astronomical fibers

Author

Yunxiang Yan ; Ruichen Wang ; Weimin Sun ; Yongjun Liu

Author_Institution

Key Lab. of In-Fiber Integrated Opt., Harbin Eng. Univ., Harbin, China

fYear

2013

fDate

7-9 Sept. 2013

Firstpage

174

Lastpage

176

Abstract

The focal ratio degradation (FRD) properties of optical fibers in the Large Sky Area Multi-Object Fiber Spectroscopy Telescope (LAMOST) caused by different stress were investigated by employing an Energy Distribution Method (EDM). We analyzed the FRD in two conditions with uniform stress and non-uniform stress. The qualitative and quantitative analyses on the output light spot from the optical fibers show that the output focal ratio is stable with uniformly compressed while FRD becomes more serious with the increasing non-uniform stress.

Keywords

astronomical telescopes; internal stresses; optical fibre testing; spectroscopy; LAMOST; energy distribution method; focal ratio degradation; large sky area multiobject optical fiber spectroscopy telescope; large-core astronomical fibers; nonuniform stress; output light spot; uniform compression; Charge coupled devices; Optical fiber devices; Optical fiber dispersion; Optical fiber testing; Optical fibers; Stress; Substrates; focal ratio degradation; optical fiber; stress;

fLanguage

English

Publisher

ieee

Conference_Titel

Optoelectronics and Microelectronics (ICOM), 2013 International Conference on

Conference_Location

Harbin

Print_ISBN

978-1-4799-1214-8

Type

conf

DOI

10.1109/ICoOM.2013.6626520

Filename

6626520