Title:
METHOD FOR MANUFACTURING OPTICAL FIBER PREFORM BASED ON SLEEVE METHOD
Document Type and Number:
WIPO Patent Application WO/2020/181788
Kind Code:
A1
Abstract:
Disclosed is a method for manufacturing an optical fiber preform based on a sleeve method, the method comprising the following steps: preparing an optical fiber mother core rod comprising a core layer and an inner cladding layer by using a VAD process, then heating and stretching the optical fiber mother core rod such that the curve degree of the stretched optical fiber core rod is less than 1 mm/m, then preparing a depressed layer by means of an OVD process, and finally, inserting the combined core rod into a quartz sleeve to form an optical fiber preform. The diameter of the prepared optical fiber preform may be up to 221 mm, the fiber pulling length of a single preform may be up to 2995 km, the attenuation coefficient of an optical fiber at a wavelength of 1310 nm is less than or equal to 0.305 dB/km, the attenuation coefficient of the optical fiber at a wavelength of 1383 nm is less than or equal to 0.275 dB/km, and the attenuation coefficient of the optical fiber at a wavelength of 1550 nm is less than or equal to 0.165 dB/km.
Inventors:
MO SIMING (CN)
LI FAN (CN)
SUI LIHONG (CN)
ZHANG GUODONG (CN)
ZHOU LI (CN)
LI XIANG (CN)
LI FAN (CN)
SUI LIHONG (CN)
ZHANG GUODONG (CN)
ZHOU LI (CN)
LI XIANG (CN)
Application Number:
PCT/CN2019/114352
Publication Date:
September 17, 2020
Filing Date:
October 30, 2019
Export Citation:
Assignee:
JIANGSU ETERN OPTICAL FIBER TECH CO LTD (CN)
International Classes:
C03B37/012; C03B37/014; C03B37/025
Foreign References:
| CN102317826A | 2012-01-11 | |||
| CN105217951A | 2016-01-06 | |||
| CN109942182A | 2019-06-28 | |||
| CN110078366A | 2019-08-02 | |||
| CN1430584A | 2003-07-16 | |||
| CN104955778A | 2015-09-30 | |||
| CN101585658A | 2009-11-25 | |||
| CN106082631A | 2016-11-09 | |||
| GB2208114A | 1989-03-01 |
Attorney, Agent or Firm:
SUZHOU RUIHAO INTELLECTUAL PROPERTY AGENCY (CN)
Download PDF: