WO2006075438A1 - 光ファイバ母材の製造方法および製造装置 - Google Patents
光ファイバ母材の製造方法および製造装置 Download PDFInfo
- Publication number
- WO2006075438A1 WO2006075438A1 PCT/JP2005/020601 JP2005020601W WO2006075438A1 WO 2006075438 A1 WO2006075438 A1 WO 2006075438A1 JP 2005020601 W JP2005020601 W JP 2005020601W WO 2006075438 A1 WO2006075438 A1 WO 2006075438A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tip position
- optical fiber
- manufacturing
- fiber preform
- soot core
- 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.)
- Ceased
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/01—Manufacture of glass fibres or filaments
- C03B37/012—Manufacture of preforms for drawing fibres or filaments
- C03B37/014—Manufacture 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]
- C03B37/01486—Means for supporting, rotating or translating the preforms being formed, e.g. lathes
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
- C03B37/07—Controlling or regulating
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2207/00—Glass deposition burners
- C03B2207/50—Multiple burner arrangements
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2207/00—Glass deposition burners
- C03B2207/60—Relationship between burner and deposit, e.g. position
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2207/00—Glass deposition burners
- C03B2207/60—Relationship between burner and deposit, e.g. position
- C03B2207/62—Distance
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2207/00—Glass deposition burners
- C03B2207/70—Control measures
Definitions
- the present invention relates to manufacturing of an optical fiber preform by the VAD method, and relates to a method and apparatus for manufacturing an optical fiber preform that can stably supply a high-quality optical fiber preform.
- the VAD method is known as one of the methods for manufacturing an optical fiber preform.
- glass particles generated by a soot core deposition panner and a cladding deposition panner installed in a reaction chamber are deposited on the tip of a starting member attached to a rotating shaft, and the soot core layer and A porous base material including a cladding layer is produced. Further, the obtained porous preform is then dehydrated and transparent vitrified to obtain an optical fiber preform.
- the tip position of the soot core is generally detected, and the pulling speed or the flow rate of the source gas is sequentially adjusted so that the position is constant. Even in that case, it is desirable that the pulling speed or the fluctuation of the flow rate of the raw material gas is suppressed as much as possible.
- Patent Document 2 JP-A-60-122736
- a detection step of detecting a tip position of a soot core based on discrete values and a detection
- an averaging process for averaging tip position values over a predetermined time and an adjustment process for adjusting soot core manufacturing conditions so that the averaged tip position values are constant Sequentially adjust the manufacturing conditions so that the difference between the averaged tip position value and the target position value set between two adjacent tip position values that can be detected discretely in advance becomes the opening.
- the soot core tip position is always accurately detected during the deposition of the glass particles, and the soot core tip position is kept constant by adjusting the pulling speed and the Z or burner raw material flow rate by adjusting the difference from the target position. And the characteristics of the optical fiber preform can be stabilized. This is because the tip position is always detected as one of two discrete values at a constant rate by setting the management target value of the soot core tip position between successive discrete values. Therefore, it is presumed that the result was always the fine adjustment.
- the target position is The value can be an internal dividing point corresponding to 0.4 to 0.6, where 1 is the interval between adjacent binary values that can be discretely detected.
- the same effect can be obtained if the target position deviates even by a slight amount of about 1Z20 between successive discrete values. However, the effect is particularly remarkable when the value of the target position is within the inner dividing point between two adjacent discrete values of 0.4 to 0.6. If the tip position is within this range, the tip position can be adjusted with a slight change in speed, and in some cases, an appropriate ratio from rotation of the soot deposit and fluctuations in the image due to the brightness of the flame used for deposition. Because the tip position is detected as two discrete values, the tip position can be controlled in a very narrow range by adjusting the speed and speed, which is small but not zero.
- the manufacturing condition to be adjusted is at least one of the soot core pulling rate and the flow rate of the raw material gas supplied for soot core deposition. be able to. This makes it possible to effectively control the tip position of the soot core using existing equipment such as a pulling speed control device for adjusting the pulling speed of the soot core and a mass flow controller for adjusting the flow rate of the supplied raw material gas.
- an optical fiber preform manufacturing apparatus using a VAD method, a CCD camera that captures the tip position of a soot core, and a tip of the soot core by digitally processing the captured image
- An image processing device that detects the position with discrete values, a PID controller that converts the discrete values into analog signals and averages them at a predetermined time, an averaged tip position value,
- An optical fiber comprising a control adjustment device that sequentially adjusts manufacturing conditions so that a difference from a target position set between two adjacent positions that can be detected discretely becomes zero.
- a base material manufacturing apparatus is provided.
- the optical fiber base material manufacturing apparatus always detects the tip position of the soot core accurately during the deposition of the glass fine particles, and adjusts the pulling speed and / or the raw material flow rate to the burner with respect to the target position. Therefore, the tip position of the soot core can be kept constant. Sex can be stabilized.
- the control adjustment device controls the pulling speed control device for adjusting the pulling speed of the soot core and the flow rate of the supplied source gas via the mass flow controller. It can be at least one of the mass flow controller devices. As a result, the tip position of the soot core can be effectively controlled using existing equipment.
- the tip position of the soot core is always accurately detected during the deposition of the glass fine particles.
- the tip position of the soot core can be kept constant by adjusting the pulling speed and / or the raw material flow rate to the burner so that the difference from the target position can be maintained, and the power S can be stabilized.
- FIG. 1 is a schematic explanatory diagram showing a soot core tip position control system according to a first embodiment.
- FIG. 2 is a schematic explanatory view showing a soot core tip position control system according to a second embodiment.
- FIG. 3 is a graph showing a control state of the soot core tip position according to Example 1.
- FIG. 4 is a graph showing the control state of the soot core tip position according to Comparative Example 1.
- the tip position 3 of the soot core was photographed with a CCD camera 6, and the image processing device 7 also detected the tip position 3 of the soot core (see Fig. 1).
- the tip position was detected by changing the brightness of the image.
- Method to detect tip position from brightness change Examples of the method include a method using a threshold value and a method using a rate of change in brightness. However, the tip position obtained by either method is a discrete value depending on the resolution of the image.
- the minimum interval of the tip position 3 that can be detected as a discrete value is a force S that varies depending on the resolution of the image, 0.2 mm in the system used in this example.
- This tip position 3 is converted into an analog electrical signal, input to the PID controller 8, and averaged for 20 seconds on the PID controller 8 side, so that the difference between the averaged tip position and the target position becomes zero
- a system for adjusting the raising speed of the bow I with a lifting device not shown in the figure via the hanging mechanism 4 was adopted.
- the control at this time was PI control using a proportional component with respect to the difference and an integral component to prevent offset.
- the target position deviates from a discrete value by a slight amount, for example, about 1/20 of the interval between two discrete values, the same effect was seen, but the effect was particularly remarkable. This is the case where the target position is located within the interior dividing point between two adjacent discrete values of 0.4 to 0.6. If there is a tip position within this range, the tip position can be adjusted by a slight change in speed. Depending on the case, the fluctuation power of the image due to the rotation of the soot deposit and the brightness of the flame used for deposition Because the tip position is detected as two discrete values, the tip position can be controlled in a very narrow range with a speed adjustment that is small but not zero.
- An optical fiber preform was manufactured in the same system as in Example 1.
- soot core tip position 3 detected by CCD camera 6 and image processing device 7 is converted to an analog electrical signal, input to PID controller 8, and averaged for 20 seconds on PID controller 8 side. went.
- the tip position 3 is controlled by a mass flow controller (flow rate control device) 9 so that the difference between the tip position obtained by averaging and the target position becomes zero.
- the system changed the flow rate (see Fig. 2).
- the control at this time is a product to prevent a proportional component and offset with respect to the difference. PI control using minute components.
- the target position deviates from a discrete value by a slight amount, for example, about 1/20 of the difference between two discrete values, the same effect is seen, but the effect is particularly effective.
- the case where the tip position is located at the inner dividing point between two adjacent discrete values of 0.4 to 0.6 is remarkable. If there is a tip position near this point, the tip position can be adjusted by changing the raw material gas flow rate.
- Silica fine particles were deposited using the same system as in Example 1, but the target position at the tip of the soot core was almost matched with the discrete value.
- the detected tip position coincides with the target position, but in reality, it is always at the same position while it is in a position with a width of about 0.2 mm.
- the tip position is slightly shifted until the tip position changes by 0.2 mm at the maximum. Is not detected.
- a sudden change in the detected tip position suddenly occurred, causing a relatively large speed fluctuation.
- the management target of the tip position of the soot core has been set to one of discretely detected positions. For this reason, the position of the tip fluctuated, and in order to adjust the position fluctuation, the pulling speed fluctuated or the raw material gas flow fluctuated as a result.
- the tip position management target is set between the two discrete values, the tip position is always detected as one of the two discrete values at a constant rate. As a result, fine adjustments are always made. Therefore, there is always a slight fluctuation, but as a result, even a slight change in the tip position is detected, and an appropriate adjustment is made quickly and a large fluctuation is prevented.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Manufacture, Treatment Of Glass Fibers (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005800488531A CN101132997B (zh) | 2005-01-12 | 2005-11-10 | 光纤母材的制造方法及制造装置 |
| US11/822,992 US20070271961A1 (en) | 2005-01-12 | 2007-07-11 | Production method and device of optical fiber parent material |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005005550A JP4496092B2 (ja) | 2005-01-12 | 2005-01-12 | 光ファイバ母材の製造方法及び装置 |
| JP2005-005550 | 2005-01-12 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US11/822,992 Continuation US20070271961A1 (en) | 2005-01-12 | 2007-07-11 | Production method and device of optical fiber parent material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2006075438A1 true WO2006075438A1 (ja) | 2006-07-20 |
Family
ID=36677471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2005/020601 Ceased WO2006075438A1 (ja) | 2005-01-12 | 2005-11-10 | 光ファイバ母材の製造方法および製造装置 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20070271961A1 (ja) |
| JP (1) | JP4496092B2 (ja) |
| KR (1) | KR20070096011A (ja) |
| CN (1) | CN101132997B (ja) |
| TW (1) | TW200624399A (ja) |
| WO (1) | WO2006075438A1 (ja) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110107797A1 (en) * | 2008-07-18 | 2011-05-12 | Shin-Etsu Chemical Co., Ltd. | Optical fiber preform manufacturing method and optical fiber preform manufacturing device |
| US8163905B2 (en) | 2007-06-27 | 2012-04-24 | Astrazeneca Ab | Compounds and their uses 708 |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5578024B2 (ja) * | 2010-10-27 | 2014-08-27 | 住友電気工業株式会社 | ガラス母材の製造方法 |
| CN104355532A (zh) * | 2014-10-30 | 2015-02-18 | 江苏通鼎光电股份有限公司 | 光纤预制棒的制造方法 |
| JP6452091B2 (ja) * | 2015-04-20 | 2019-01-16 | 信越化学工業株式会社 | 光ファイバ用多孔質ガラス母材の焼結方法 |
| DE102017001436B4 (de) * | 2017-02-15 | 2023-04-27 | Paragon Ag | Partikelmessvorrichtung und Verfahren zum Betrieb derselben |
| CN109862256B (zh) * | 2018-12-25 | 2020-10-27 | 武汉凌云光电科技有限责任公司 | 一种视觉定位带纤的装置及定位方法 |
| JP7753706B2 (ja) * | 2021-07-26 | 2025-10-15 | 住友電気工業株式会社 | ガラス微粒子堆積体の製造方法および製造装置 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02500684A (ja) * | 1986-09-20 | 1990-03-08 | フラウンホッファー‐ゲゼルシャフト ツァ フェルダールング デァ アンゲヴァンテン フォアシュンク エー.ファオ. | ラインまたはマトリックスカメラの解像度拡大の方法 |
| JPH08198634A (ja) * | 1995-01-19 | 1996-08-06 | Yazaki Corp | 光ファイバ母材の製造方法 |
| JPH10206113A (ja) * | 1997-01-20 | 1998-08-07 | Nikon Corp | エッジ位置検出方法及び画像測定装置 |
| JP2000351634A (ja) * | 1999-06-14 | 2000-12-19 | Shin Etsu Chem Co Ltd | 多孔質ガラス母材の製造方法 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002187733A (ja) * | 2000-12-14 | 2002-07-05 | Furukawa Electric Co Ltd:The | 光ファイバ母材の製造方法および光ファイバの製造方法 |
| JP2002326833A (ja) * | 2001-05-02 | 2002-11-12 | Furukawa Electric Co Ltd:The | 光ファイバ母材の製造装置及びそれを用いた光ファイバ母材の製造方法 |
| EP1496024A1 (en) * | 2003-07-07 | 2005-01-12 | Sumitomo Electric Industries, Ltd. | Method of producing glass-particle-deposited body and glass-particle-synthesizing burner |
-
2005
- 2005-01-12 JP JP2005005550A patent/JP4496092B2/ja not_active Expired - Fee Related
- 2005-11-10 CN CN2005800488531A patent/CN101132997B/zh not_active Expired - Fee Related
- 2005-11-10 KR KR1020077018309A patent/KR20070096011A/ko not_active Withdrawn
- 2005-11-10 WO PCT/JP2005/020601 patent/WO2006075438A1/ja not_active Ceased
- 2005-11-24 TW TW094141246A patent/TW200624399A/zh unknown
-
2007
- 2007-07-11 US US11/822,992 patent/US20070271961A1/en not_active Abandoned
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02500684A (ja) * | 1986-09-20 | 1990-03-08 | フラウンホッファー‐ゲゼルシャフト ツァ フェルダールング デァ アンゲヴァンテン フォアシュンク エー.ファオ. | ラインまたはマトリックスカメラの解像度拡大の方法 |
| JPH08198634A (ja) * | 1995-01-19 | 1996-08-06 | Yazaki Corp | 光ファイバ母材の製造方法 |
| JPH10206113A (ja) * | 1997-01-20 | 1998-08-07 | Nikon Corp | エッジ位置検出方法及び画像測定装置 |
| JP2000351634A (ja) * | 1999-06-14 | 2000-12-19 | Shin Etsu Chem Co Ltd | 多孔質ガラス母材の製造方法 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8163905B2 (en) | 2007-06-27 | 2012-04-24 | Astrazeneca Ab | Compounds and their uses 708 |
| US20110107797A1 (en) * | 2008-07-18 | 2011-05-12 | Shin-Etsu Chemical Co., Ltd. | Optical fiber preform manufacturing method and optical fiber preform manufacturing device |
| US10501361B2 (en) * | 2008-07-18 | 2019-12-10 | Shin-Etsu Chemical Co., Ltd. | Optical fiber preform manufacturing method and optical fiber preform manufacturing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101132997B (zh) | 2011-03-16 |
| CN101132997A (zh) | 2008-02-27 |
| TW200624399A (en) | 2006-07-16 |
| JP4496092B2 (ja) | 2010-07-07 |
| JP2006193360A (ja) | 2006-07-27 |
| KR20070096011A (ko) | 2007-10-01 |
| US20070271961A1 (en) | 2007-11-29 |
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