DocumentCode :
828414
Title :
Fiber fuse phenomenon in triangular-profile single-mode optical fibers
Author :
Shuto, Yoshito ; Yanagi, Shuichi ; Asakawa, Shuichiro ; Kobayashi, Masaru ; Nagase, Ryo
Author_Institution :
NTT Photonics Labs., Nippon Telegraph & Telephone Corp., Kanagawa, Japan
Volume :
24
Issue :
2
fYear :
2006
Firstpage :
846
Lastpage :
852
Abstract :
The unsteady-state thermal conduction processes in triangular-profile (TP) optical fibers, which exhibited zero chromatic dispersion near 1.55 μm, were studied theoretically with the explicit finite-difference method (FDM). It was estimated that these fibers would exhibit a high-temperature optical absorption on the basis of the high-temperature loss-increase mechanism proposed for step-index (SI) optical fibers. The core-center temperature of the TP fibers changed suddenly and reached over 7×105 K when a 1.064-μm laser power of 1 W was inputted into the core layer heated at 2608 K. This rapid heating of the core initiated the "fiber fuse" phenomenon. The propagation rates of the fiber fuse, estimated at 1.064 μm, were in fairly good agreement with the experimentally determined values. It was found that the threshold powers for initiating the fiber fuse are linearly proportional to the roots of the effective core areas of both the SI and the TP optical fibers. This coincides the experimental result reported by Seo et al.
Keywords :
finite difference time-domain analysis; heat conduction; heat treatment; optical fibre dispersion; optical fibre losses; 1 W; 1.064 mum; 1.55 mum; 2608 K; 7E5 K; core layer heating; core-center temperature; fiber fuse phenomenon; fiber fuse propagation; finite-difference method; high-temperature mechanism; loss-increase mechanism; optical absorption; single-mode optical fibers; step-index optical fibers; triangular-profile optical fibers; unsteady-state thermal conduction; zero chromatic dispersion; Absorption; Chromatic dispersion; Fiber lasers; Finite difference methods; Fuses; Laser transitions; Optical fiber losses; Optical fibers; Temperature; Thermal conductivity; Absorption coefficient; electrical conductivity; fiber fuse phenomenon; single-mode optical fiber; thermal conduction;
fLanguage :
English
Journal_Title :
Lightwave Technology, Journal of
Publisher :
ieee
ISSN :
0733-8724
Type :
jour
DOI :
10.1109/JLT.2005.862433
Filename :
1593756
Link To Document :
بازگشت