Patent ID: 7359602
Filing Date: 2008-04-15
Classification: C03C,G01M,G02B

Abstract:
1. An optical fiber mainly comprised of silica glass, comprising a core region extending along a predetermined axis, and a cladding region prepared on an outer periphery of said core region, said fiber having a transmission loss of 0.28 dB/km to 0.32 dB/km at the wavelength of 1310 nm, a mode field diameter of 8.3 μm to 9.0 μm at the wavelength of 1310 nm, a cable cutoff wavelength of 1260 nm or less and an increase of loss of 0.3 dB/km or less caused by OH-radical at the wavelength of 1380 nm, and a bending loss of 3 dB/m or less at the bending diameter of 20 mm at the wavelength of 1550 nm.