ディリクレ固有値
Fevrier; V. Doya; P. Roy; D. Pagnoux (2003). “Modeling and optimization of double-clad fiber amplifiers using chaotic propagation of pump”. Optical Fiber Technology 7 (4): 324–339. Bibcode: 2001OptFT...7..324L. doi:10.1006/ofte.2001.0361. http://www.ingentaconnect.com/content/ap/of/2001/00000007/00000004/art00361.
↑ A. Liu; K. Ueda (1996). “The absorption characteristics of circular, offset, and rectangular double-clad fibers”. Optics Communications 132 (5-6): 511–518. Bibcode: 1996OptCo.132..511A. doi:10.