The invention relates to a method for manufacturing a high bandwidth gradual change multimode optical fiber by using MCVD process. The first approximation method to achieve precise control of the refractive index of the optical fiber rods, burning and corrosion combination helps make up the core to get the center narrow depression rate index. The dispersion and repeatability of the index of refractive index distribution in the conventional 0 approximation method and the empirical correction method are solved. Multimode fiber made by the refraction rate control accuracy of 5 * 10 + / - 5, 1.3 m, the average bandwidth 1700MH Z.Km up 5GH Z.Km, the transmission loss of 0.5 ~ 1.0dB / Km, can be used for three or four times in the field of optical fiber communication group.
【技术实现步骤摘要】
【技术保护点】
一种高带宽渐变型多模光纤的制造方法,采用MCVD工艺制备光纤予制棒(该工艺包括在石英包皮管内沉积组分为F-P↓〔2〕O↓〔3〕-SiO↓〔2〕三元系的包层,沉积组分为GeO↓〔2〕-P↓〔2〕O↓〔5〕-SiO↓〔2〕三元系的芯层时只改变主掺杂剂GeCl↓〔4〕的流量,将沉积好的石英管烧缩成实芯棒),然后将所得予制棒拉成光纤,其特征是采用一次近似法控制GeCl↓〔4〕的载气流量F↓〔i〕相对于喷灯移动次数i的变化,一次近似的计算公式如下:F↓〔i〕=Fo〔1-(1-i/N )↑〔a/2〕〕.{1+β〔1-(1-i/N)↑〔a/2〕}式中F↓〔1〕为第i层的GeCl↓〔 ...
【技术特征摘要】
【专利技术属性】
技术研发人员:梁建明,王旭华,
申请(专利权)人:杭州无线电材料厂,
类型:发明
国别省市:33[中国|浙江]
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