2mu m silica fiber core rod glass and preparation method thereof
A technology of silica optical fiber and core rod, which is applied in the field of optical fiber preform preparation, can solve the problem that there is no clear way to obtain large-size rare earth-doped silica glass core rod, and achieve low hydroxyl content, low hydroxyl content, and low back-to-back loss Effect
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Embodiment 1
[0040] The core rod glass formula: 0.1Tm 2 o 3 -1.5Al 2 o 3 -98.4SiO2 2 (mol%). The preparation method of the core rod glass is: under room temperature and magnetic stirring, according to Si(OCH 3 ) 4 :C 2 h 5 OH:H 2 The molar ratio of O=1:4:2, using ammonia water as a catalyst, prepare a transparent sol liquid, and adjust the pH of the solution to 8. Then according to the designed core rod glass formula, add AlCl 3 ·6H 2 O and TmCl 3 ·6H 2 O. Stir at room temperature for 24 hours to form a transparent doped sol, and leave it in a closed container until it gels; place the gel in a tube furnace at 600°C for 12 hours to remove residual carbon and hydroxyl groups, and obtain T m 3+ , Al 3+ Co-blended silicon oxide powder; use ball milling equipment to ball mill the silicon oxide powder, and use a 150-mesh polytetrafluoro sieve to screen out the powder with a particle size below 100 microns; place the sieved powder in a vacuum for 10 -3 Melt at 1800°C for 8 hours...
Embodiment 2
[0042] The core rod glass formula: 0.1Tm 2 o 3 -1.5Al 2 o 3 -98.4SiO2 2 (mol%). Under room temperature and magnetic stirring, according to Si(OC 2 h 5 ) 4 :C 2 h 5 OH:H 2 The molar ratio of O=1:4:2, using hydrochloric acid as a catalyst, prepare a transparent sol liquid, and adjust the pH=1 of the solution. Then according to the designed core rod glass formula, add AlCl 3 ·6H 2 O and TmCl 3 ·6H 2 O, stirred at room temperature for 12 hours to form a doped sol, and left to gel in a closed container; the gel was placed in a tube furnace and kept at 1000°C for 8 hours to remove residual carbon and hydroxyl groups. Get Tm 3+ , Al 3+ Co-blended silicon oxide powder; use ball milling equipment to ball mill the silicon oxide powder, and use a 150-mesh polytetrafluoro sieve to screen out the powder with a particle size below 100 microns; place the sieved powder in a vacuum for 10 -1 Melt at 1600°C for 8 hours in a Pa high temperature furnace, and form bubble-free tra...
Embodiment 3
[0045] The mandrel glass formula: 0.3Tm 2 o 3 -4.5Al 2 o 3 -95.2SiO2 2 (mol%). Under room temperature and magnetic stirring, according to Si(OC 2 h 5 ) 4 :C 2 h 5 OH:H 2 The molar ratio of O=1:20:10, using hydrochloric acid as a catalyst, prepare a transparent sol liquid, and adjust the pH of the solution to 3. Then according to the designed core rod glass formula, add AlCl 3 ·6H 2 O and TmCl 3 ·6H 2 O, stirred at room temperature for 10 hours to form a doped sol, and left to gel in a closed container; the gel was placed in a tube furnace and kept at 800°C for 8 hours to remove residual carbon and hydroxyl groups. Get Tm 3+ , Al 3+ Co-blended silicon oxide powder; use ball milling equipment to ball mill the silicon oxide powder, and use a 150-mesh polytetrafluoro sieve to screen out the powder with a particle size below 100 microns; place the sieved powder in a vacuum for 10 -3 It is melted at 1750°C for 5 hours in a Pa high-temperature furnace, and forms a b...
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