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Method for producing low water peak fiber

A manufacturing method, low water peak technology, applied in the direction of manufacturing tools, glass manufacturing equipment, glass fiber products, etc., can solve problems such as difficulties

Active Publication Date: 2007-02-21
FENGHUO COMM SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with the deposition layer with SOOT structure state, it is obviously much more difficult to remove OH in this transparent deposition layer.

Method used

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  • Method for producing low water peak fiber
  • Method for producing low water peak fiber
  • Method for producing low water peak fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] In a production workshop with a temperature of 25°C, a relative humidity of 5% provided by dry air, and a cleanliness level of 1000 (that is, the cleanliness level M4.5 set by the US Federal Standard), the high-purity raw material Freon / SF 6 , The high-purity oxygen mixed gas is introduced into the quartz substrate tube with a hydroxyl content of 10ppb placed on the MCVD deposition lathe through a sealed pipeline, and the inner wall of the quartz substrate tube is corroded and dehydroxylated at a temperature of 1800°C to reduce the inner surface of the quartz substrate tube. The hydroxyl content of the wall. Then, pass high-purity SiCl 4 , POCl 3 , high-purity oxygen, chlorine, and helium mixed gas, the mixed gas reacts at a temperature of 1350 ° C and deposits a certain thickness of loose-structured powder (Soot) on the inner wall of the quartz substrate tube. Subsequently, at a temperature of 1180° C., after purging with high-purity helium, 4% deuterium (4% D 2 +96...

Embodiment 2

[0094] In a production workshop with a temperature of 25°C, a relative humidity of 10% provided by dry air, and a cleanliness level of 1000 (that is, the cleanliness level M4.5 set by the US Federal Standard), the high-purity raw material Freon / SF 6 The mixed gas of high-purity oxygen is introduced into the quartz substrate tube with a hydroxyl content of 10ppb placed on the MCVD deposition lathe through a sealed pipeline, and the inner wall of the quartz substrate tube is corroded and dehydroxylated at a temperature of 1800 ° C to reduce the quartz substrate. Hydroxyl content of the inner wall of the tube. Then, introduce high-purity SiCl 4 , POCl 3 , high-purity oxygen, chlorine, and helium mixed gas, the mixed gas reacts at a temperature of 1380 ° C and deposits a certain thickness of loose-structured powder (Soot) on the inner wall of the quartz substrate tube. After the high-purity helium is purged, at a temperature of 1200 ° C, heavy water (D 2 O) mixed gas, the Soot ...

Embodiment 3

[0101] In a production workshop with a temperature of 25°C, a relative humidity of 15% provided by dry air, and a cleanliness level of 1000 (that is, the cleanliness level M4.5 set by the US Federal Standard), the high-purity raw material Freon / SF 6 The mixed gas of high-purity oxygen is introduced into the quartz substrate tube with a hydroxyl content of 10ppb placed on the MCVD deposition lathe through a sealed pipeline, and the inner wall of the quartz substrate tube is corroded and dehydroxylated at a temperature of 1800 ° C to reduce the quartz substrate. Hydroxyl content of the inner wall of the tube. Subsequently, at a temperature of 1200°C, after purging with high-purity helium, 2% deuterium (2% D 2 +98% He) mixed gas dehydrates and deuterium-hydrogen exchange the Soot deposited on the inner wall of the quartz substrate tube, and the treatment time is 30 minutes. Soot, which has been fully dehydrated and deuterium-hydrogen exchanged, is vitrified at a temperature of 1...

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Abstract

The invention relates to a method for producing low water peak fiber by improved chemical gas phase deposition (MCVD) method, wherein the single-mode optical fiber has an attenuation coefficient <0.320 dB / km at the position of 1310nm, the monohydric peak attenuation coefficient is less than 0.310dB / km.

Description

technical field [0001] The invention relates to a method for manufacturing low water peak optical fiber, in particular to a method for manufacturing low water peak optical fiber by reducing the hydroxyl content in optical fiber prefabricated rods by adopting an improved chemical vapor deposition (MCVD) process. Background technique [0002] Conventional single-mode fiber (G.652A) has high transmission loss in the wavelength range of 1360nm to 1460nm, which affects the application of optical communication systems in this working band. The reason is that the harmonic vibration absorption of hydroxyl (OH) group series causes this In-band loss increases. Since the wavelength around 1383nm is the main vibration absorption peak of OH, the absorption peak at 1383±3nm is customarily called the water peak. ITU-T calls the 1360nm~1460nm band the extended band (i.e. E-band). The G.652C specification requires that after the optical fiber undergoes fiber hydrogen loss, its maximum atten...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B37/012C03B37/014C03B37/018C03B37/02G02B6/00
CPCC03B37/01807C03B2201/22C03B2201/28C03B2201/31C03B2203/24C03B2207/86Y02P40/57
Inventor 陈伟唐仁杰李诗愈李进延陆大方成煜李海清
Owner FENGHUO COMM SCI & TECH CO LTD
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