J-fiber Gmbh

Falk Wirth

Lothar Brehm

Wolfgang Hämmerle

Christian Genz

Harald Hein

The invention relates to a bend insensitive gradient index multi-mode light conducting fiber comprising a leakage mode dependent optical core diameter that is uniform over its length and a numerical aperture that is uniform over its length, wherein for a light wavelength of 850 nm and an overfilled launch (OFL), the optical core diameter for a fiber length in a range between 2 m and 100 m decreases by less than 5% and the numerical aperture decreases by less than 2.5% and the curvature related attenuation increase for two turns and a curvature radius of 7.5 mm is less than 0.2 db.

Bend insensitive gradient index multi-mode light conducting fiber

The invention relates to a bend insensitive gradient index multimode light conducting fiber comprising a leakage mode dependent optical core diameter that is uniform over its length and numerical aperture that is uniform over its length, a core (), an inner cladding (), a refraction index trench () and an outer cladding (), wherein the core () includes a core radius R, an alpha-refraction index profile and a core refraction index difference dnwith respect to the outer cladding (), wherein the refraction index trench () includes a refraction index trench radius Rand a trench refraction index difference dnwith respect to the outer cladding (), wherein the outer cladding () includes an outer cladding radius Rand a refraction index between 1.40 and 1.55, wherein for a light wavelength of 850 nm and an overfilled launch (OFL), the optical core diameter for a fiber length in a range between 2 m and 300 m decreases by less than 5% and the numerical aperture decreases by less than 2.5% and the curvature related attenuation increase for two turns and a curvature radius of 7.5 mm is less than 0.2 db.

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Jena, Germany

Falk Wirth