JPS55104941A - Production of preform for optical fiber - Google Patents

Production of preform for optical fiber

Info

Publication number
JPS55104941A
JPS55104941A JP1189779A JP1189779A JPS55104941A JP S55104941 A JPS55104941 A JP S55104941A JP 1189779 A JP1189779 A JP 1189779A JP 1189779 A JP1189779 A JP 1189779A JP S55104941 A JPS55104941 A JP S55104941A
Authority
JP
Japan
Prior art keywords
tube
diameter
set value
valve
optical fiber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1189779A
Other languages
Japanese (ja)
Inventor
Tetsuo Miya
Yukio Terunuma
Toshito Hosaka
Tadashi Miyashita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP1189779A priority Critical patent/JPS55104941A/en
Publication of JPS55104941A publication Critical patent/JPS55104941A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01Manufacture of glass fibres or filaments
    • C03B37/012Manufacture of preforms for drawing fibres or filaments
    • C03B37/014Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
    • C03B37/018Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD] by glass deposition on a glass substrate, e.g. by inside-, modified-, plasma-, or plasma modified- chemical vapour deposition [ICVD, MCVD, PCVD, PMCVD], i.e. by thin layer coating on the inside or outside of a glass tube or on a glass rod
    • C03B37/01846Means for after-treatment or catching of worked reactant gases

Abstract

PURPOSE:To obtain a preform useful in production of an optical fiber with little transmission loss by preburning a glass tube while raising or reducing the press. of a gas fed into the tube to hold the tube diameter constant. CONSTITUTION:Glass tube 3 supported by chucks 4 is rotated with rotary connector 7 and heated to the softening temp. of tube 3 or above with moving heat source 5. At this time, the tube diameter is measured in tube diameter measuring section 6. Since the smallest tube diameter has been set in exhaust vol. control section 11, when the diameter measured in section 6 exceeds the set value, magnet valve 9 is opened to smoothly exhaust a gas flowing through tube 3. On the other hand, when the diameter is smaller than the set value, valve 9 is closed to restrict the outlet of the gas in tube 3 only to the gap of nozzle valve 10, thereby expanding the heated portion of tube 3. By performing this action in the longitudinal direction of tube 3 together with movement of source 5, tube 3 can be shaped to the set value.
JP1189779A 1979-02-06 1979-02-06 Production of preform for optical fiber Pending JPS55104941A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1189779A JPS55104941A (en) 1979-02-06 1979-02-06 Production of preform for optical fiber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1189779A JPS55104941A (en) 1979-02-06 1979-02-06 Production of preform for optical fiber

Publications (1)

Publication Number Publication Date
JPS55104941A true JPS55104941A (en) 1980-08-11

Family

ID=11790510

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1189779A Pending JPS55104941A (en) 1979-02-06 1979-02-06 Production of preform for optical fiber

Country Status (1)

Country Link
JP (1) JPS55104941A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50120352A (en) * 1974-02-22 1975-09-20
JPS542140A (en) * 1977-06-07 1979-01-09 Nippon Telegr & Teleph Corp <Ntt> Preform producing apparatus for optical fibers

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50120352A (en) * 1974-02-22 1975-09-20
JPS542140A (en) * 1977-06-07 1979-01-09 Nippon Telegr & Teleph Corp <Ntt> Preform producing apparatus for optical fibers

Similar Documents

Publication Publication Date Title
JPS5311039A (en) Controller of diameter of optical fiber
GB925335A (en) Improvements in method of, and apparatus for, manufacturing light conducting devices
JPS56104302A (en) Optical fiber for infrared light and its manufacture
GB1531820A (en) Method for estimating and controlling the mass flow rate of a free falling molten glass stream
JPS55104941A (en) Production of preform for optical fiber
JPS5662379A (en) Optical operated semiconductor
JPS55162441A (en) Manufacture of optical fiber base material
GB1515476A (en) Methods and apparatus for producing tubing
JPS52119949A (en) Method of reducing variations in wire diameter of optical fibers
JPS569231A (en) Manufacture of glass rod or pipe
JPS5612603A (en) Production of multicore type optical transmission body
JPS5669235A (en) Preparation of optical fiber
JPS5542215A (en) Glass drawing method
JPS5480757A (en) Production of preform for optical fiber
JPS5659638A (en) Manufacture of optical fiber
JPS52156641A (en) Preparation of optical fiber
GB1529385A (en) Tubes of non-circular cross-section and the manufacture thereof
JPS5637243A (en) Internally sticking cvd apparatus for optical fiber
JPS57124306A (en) Chalcogenide glass fiber
JPS55158146A (en) Manufacture of optical fiber
JPS5424648A (en) Production of optical transmission wires
BR8305295A (en) PROCESS AND DEVICE FOR THE PRODUCTION OF HOT GASES
JPS53100253A (en) Production of optical fibers
JPS53125855A (en) Optical fiber drawing furnace
JPS5313435A (en) Drawing system for optical fiber