Based on the knowledge of producing optical fiber preform, MCVD process was selected as the main research object.

在了解光纤预制棒加工工艺的基础上，选择M CVD法为研究对象。

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Compared with optical fiber, optical fiber preform is characterized by its bigger size, so the measurement method for its refractive index profile has uniqueness.

光纤预制棒相对于光纤而言，由于其尺寸大的特点，折射率分布的测量方法具有独特性。

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Analysts said that Futong achieved a breakthrough in the manufacturing of optical fiber preform, the core raw material for optical fiber production, and is the first enterprise in China that can make this material with the latest all-synthesis technology.

FORBES: Technology Breakthrough Makes Chinese Fiber Optics Entrepreneur A New Billionaire

Li Fei, analyst for Dagong Global Credit Rating Company and author of the bond rating report, told FORBES that optical fiber preform is the upstream product of the optical fiber industry and requires high technical content in its manufacturing techniques.

FORBES: Technology Breakthrough Makes Chinese Fiber Optics Entrepreneur A New Billionaire