Title :
Influence of cross-sectional shape on absorption characteristics of double-clad fiber lasers
Author :
Jianqiu Xu ; Junhua Lu ; Lianren Lu ; Ueda, K.
Author_Institution :
Inst. for Laser Sci., Univ. of Electro-communications, Tokyo, Japan
Abstract :
Summary form only given. In this paper, the influence of cross-sectional shapes on the absorption characteristics is investigated by directly solving the wave-propagation equations in the double-clad fiber (DCF). The mode-coupling caused by nonuniform absorption of the doped core is considered. The effective absorption depends on both direct absorption and coupling effects between the eigenmodes. Finally, a characteristic absorption parameter is proposed to compare the effects of the cross-sectional shape of the inner cladding on absorption characteristics of DCFs.
Keywords :
absorption coefficients; coupled mode analysis; eigenvalues and eigenfunctions; fibre lasers; optical fibre cladding; absorption characteristics; absorption effects; characteristic absorption parameter; coupled differential equations; coupling coefficient; cross-sectional shape; doped core nonuniform absorption; double-clad fiber lasers; effective absorption; eigenmode coupling effects; inner cladding; mode-coupling; nonexponential absorption; wave-propagation equations; Absorption; Biomedical optical imaging; Fiber lasers; Laser excitation; Optical fiber communication; Optical pumping; Power lasers; Pump lasers; Semiconductor lasers; Shape;
Conference_Titel :
Lasers and Electro-Optics, 2002. CLEO '02. Technical Digest. Summaries of Papers Presented at the
Conference_Location :
Long Beach, CA, USA
Print_ISBN :
1-55752-706-7
DOI :
10.1109/CLEO.2002.1034275
