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1. (WO2017036030) BEND-RESISTANT FINE OPTICAL FIBER AND MANUFACTURING METHOD THEREOF

Pub. No.:    WO/2017/036030    International Application No.:    PCT/CN2015/099425
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Wed Dec 30 00:59:59 CET 2015
IPC: G02B 6/02
Applicants: ZHONGTIAN TECHNOLOGY FIBRE OPTICS CO., LTD
中天科技光纤有限公司
Inventors: CAO, Shanshan
曹珊珊
LIU, Zhizhong
刘志忠
HU, Jigang
胡继刚
WHANG, Zhen
王震
ZHANG, Haitao
张海涛
ZHOU, Hui
周慧
Title: BEND-RESISTANT FINE OPTICAL FIBER AND MANUFACTURING METHOD THEREOF
Abstract:
A bend-resistant fine optical fiber and manufacturing method thereof. The method comprises: preparing a preform via an improved chemical vapor deposition process, and manufacturing an optical fiber via drawing at a certain temperature, wherein a diameter of a cladding layer of the optical fiber is 80 ± 1 μm, a diameter of a coating layer thereof is 155-170 μm; and computing a service life of the optical fiber via an established computation model after the manufacturing. In the present invention, the bend-resistant fine optical fiber is primarily formed by a core layer, a terrace layer, a sunken layer, a cladding layer and a coating layer, and the relative refractive index and radius of each of said layers is reasonably controlled, and a cutoff wavelength is effectively controlled by employing an automatic temperature and tension monitoring procedure during the drawing process, such that the cutoff wavelength and a mode field diameter are maintained in a relatively stable range, and the cutoff wavelength is adjusted upward while the mode field diameter remains stable, thus facilitating a decrease of bend loss of the optical fiber.