Patent ID: 6661958
Filing Date: 2003-12-09
Classification: C03B,C03C,G02B,G02F,H01S

Abstract:
An optical fiber comprising, at least, a core region having a maximum refractive index value of n1; a first cladding region, disposed at an outer periphery of said core region, having a minimum refractive index value of n2 (where n21); and a second cladding region, disposed at an outer periphery of said first cladding region, having a maximum refractive index value of n3 (where n231); and having, as characteristics with respect to light having a wavelength of 1.55 &mgr;m,an effective area of 11 &mgr;m2 or less, a cutoff wavelength &lgr;c of at least 0.7 &mgr;m but not exceeding 1.6 &mgr;m at a fiber length of 2 m, and a nonlinear coefficient of at least 18/W/km.