MULTIMODE FIBER WITH REFRACTIVE INDEX DISTRIBUTION PROFILE, OPTICAL COMMUNICATION SYSTEM INCORPORATING AFORESAID FIBER AND METHOD OF ITS PRODUCTION Russian patent published in 2009 - IPC G02B6/28 

FIELD: physics, optics.

SUBSTANCE: invention relates to multimode fiber with refractive index distribution profile. The proposed multimode comprises light conducting core with one or more layers of cladding, that features, at least, 1Gbit/s capacity in the range of wave widths of, at least, 100 nm in spectral range comprising 1300 nm-wanelength and allowing aforesaid capacity over the fiber length of, at least, 1000 m. The method of producing above fiber comprises applying glass layers, with doping impurities or without them, onto the substrate inner side by gas plating using the mix of chemically active gases to produce a semi-finished product with preset refractive index distribution profile. Aforesaid semi-finished product is now drawn to make a multimode optical fiber by heating up one end of the semi-finished product. The concentration of one doping impurity in light-conducting core is adjusted so that the concentration of doping impurity on the fiber axis is lower than that of the aforesaid light conducting core.

EFFECT: method of producing optical fiber with preset refractive index distribution profile.

32 cl, 6 dwg