Title :
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
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;
Conference_Titel :
Optoelectronics and Microelectronics (ICOM), 2013 International Conference on
Conference_Location :
Harbin
Print_ISBN :
978-1-4799-1214-8
DOI :
10.1109/ICoOM.2013.6626520
