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    AN IMPROVED METHOD FOR FABRICATING RARE EARTH (RE) DOPED OPTICAL FIBER USING A NEW CODOPANT
    2.
    发明公开
    AN IMPROVED METHOD FOR FABRICATING RARE EARTH (RE) DOPED OPTICAL FIBER USING A NEW CODOPANT 审中-公开
    改进方法有稀土（SE）掺杂的光纤用改进的CODOTIERSTOFFS PRODUCING

    公开(公告)号：EP2411340A2

    公开(公告)日：2012-02-01

    申请号：EP10720035.4

    申请日：2010-03-29

    申请人： Council of Scientific & Industrial Research ,  Department Of Information Technology

    发明人： SEN, Ranjan ,  DHAR, Anirban ,  PAUL, Mukul, Chandra ,  MAITI, Himadri, Sekhar

    IPC分类号： C03B37/018

    CPC分类号： C03B37/01838 ,  C03B2201/28 ,  C03B2201/31 ,  C03B2201/34 ,  C03B2201/54 ,  C03C3/095 ,  C03C4/0071 ,  C03C13/046 ,  Y02P40/57

    摘要： The present invention provides a method of making rare earth (RE) doped optical fiber using BaO as co-dopant instead of Al or P commonly used for incorporation of the RE in silica glass by MCVD and solution doping technique. The method comprises deposition of particulate layer of GeO
    2 doped SiO
    2 with or without small P
    2 O
    5 for formation of the core and solution doping by soaking the porous soot layer into an aqueous solution of RE and Ba containing salt. This is followed by dehydration and sintering of the soaked deposit, collapsing at a high temperature to produce the preform and drawing of fibers of appropriate dimension. The use of Ba-oxide enables to eliminate unwanted core-clad interface defect which is common in case of Al doped fibers. The fibers also show good RE uniformity, relatively low optical loss in the 0.6-1.6 μm wavelength region and good optical properties suitable for their application in amplifiers, fiber lasers and sensor devices.

    摘要翻译： 本发明提供了制备稀土（RE）掺杂的光纤用的BaO作为常用于通过MCVD和溶液掺杂技术在石英玻璃中的RE的掺入共掺杂剂代替Al或P纤维的方法。 该方法包括的GeO 2的微粒层的沉积掺杂的SiO 2具有或不具有由多孔烟灰层浸泡成RE的wässrige溶液和含有盐的Ba小P2O5用于形成芯和溶液掺杂的。 这是通过浸泡沉积物的脱水和烧结其次，在高温下塌陷，以产生适当尺寸的纤维预成型件和绘图。 使用钡的氧化物可以消除不需要的芯 - 包层界面缺陷所有这是常见以Al掺杂光纤的情况下。 因此，该纤维显示出良好的均匀性RE，在0.6-1.6妈妈波长区域相对较低的光损耗和良好的光学性质适合于它们在放大器，光纤激光器和传感器装置的应用。

    A PROCESS FOR FABRICATION OF YTTERBIUM DOPED OPTICAL FIBER
    5.
    发明公开
    A PROCESS FOR FABRICATION OF YTTERBIUM DOPED OPTICAL FIBER 有权
    VERFAHREN ZUR HERSTELLUNG EINER YTTERBIUM-DOTIERTEN GLASFASER

    公开(公告)号：EP3001834A1

    公开(公告)日：2016-04-06

    申请号：EP14724803.3

    申请日：2014-03-26

    申请人： Council of Scientific & Industrial Research ,  Department Of Electronics And Information Technology

    发明人： SEN, Ranjan ,  SAHA, Maitreyee

    IPC分类号： C03B37/018

    CPC分类号： C03B37/01853 ,  C03B37/018 ,  C03B37/01807 ,  C03B37/01815 ,  C03B37/025 ,  C03B2201/36 ,  C03B2203/22 ,  C03B2207/50 ,  C03B2207/66 ,  C03B2207/81 ,  C03B2207/90

    摘要： The present invention provides a process for fabrication of ytterbium (Yb) doped optical fiber through vapor phase doping technique. The method comprises deposition of Al2O3 and Yb2O3 in vapor phase simultaneously in combination with silica during formation of sintered core layer. This is followed by collapsing at a high temperature in stepwise manner to produce the preform and drawing of fibers of appropriate dimension. The process parameters have been optimized in such a way that Al and Yb-chelate compounds can be transported to the reaction zone without decomposition and condensation of precursor materials. Thus variations of dopants concentration along the length of the preform have been minimized to

    摘要翻译： 本发明提供一种通过气相掺杂技术制造掺杂镱（Yb）的光纤的方法。 该方法包括在形成烧结芯层的过程中同时与二氧化硅相结合的气相中的Al2O3和Yb2O3。 随后在高温下以逐步的方式塌缩以产生预成型件和拉制适当尺寸的纤维。 已经优化了工艺参数，使得Al和Yb螯合化合物可以转运到反应区而不会分解和冷凝前体材料。 因此，沿着预成型件的长度的掺杂剂浓度的变化已经被最小化到<1％，并且还实现了该方法的良好的重复性。 所得到的纤维也具有光滑的芯包覆边界，没有任何星形缺陷。 该方法可以可靠地用于制造大型Yb掺杂光纤。 纤维也显示低损耗，可忽略的中心浸渍和良好的光学性能，适用于光纤激光器。

    NOVEL SODA LIME SILICATE GLASS COMPOSITION COMPRISING COLEMANITE AND A PROCESS FOR THE PREPARATION THEREOF
    6.
    发明公开
    NOVEL SODA LIME SILICATE GLASS COMPOSITION COMPRISING COLEMANITE AND A PROCESS FOR THE PREPARATION THEREOF 审中-公开
    新型钠钙硅酸盐玻璃组成硬硼和方法及其生产

    公开(公告)号：EP3004004A1

    公开(公告)日：2016-04-13

    申请号：EP13780415.9

    申请日：2013-09-13

    申请人： Council Of Scientific & Industrial Research

    发明人： KALYANDURG, Annapurna ,  BISWAS, Kaushik ,  SONTAKKE, Atul, Dnyaneshwar ,  SEN, Ranjan

    IPC分类号： C03C3/091

    CPC分类号： C03C3/091

    摘要： The present invention relates to the development of novel soda lime silicate glass compositions comprising colemanite for energy efficient processing. The evaluated thermal, optical, and mechanical properties of the glasses indicate that these invented glasses are suitable for manufacturing superior quality flat glasses specifically for solar panel and container glasses with a significant reduction in batch melting temperature by around 150°C. The incorporation of B2O3 at its maximum level of 12.24 wt% for flat glass and 13.24 wt% for container glass compositions originating from the addition of colemanite with simultaneous substitution for limestone (CaCO3) up to 100% in the investigated glasses resulted in an energy efficient, cost effective and environment friendly glass melting process.

    摘要翻译： 本发明涉及新的钠钙硅酸盐玻璃组合物，包含用于能量高效的处理硬硼酸钙石的发展。 眼镜的所评估的热学，光学和机械性质表明确实论文发明眼镜是适合于通过约150℃特别制造品质优越平板玻璃用于太阳能板和容器眼镜在分批熔融温度的降低显著C. B2O3的平板玻璃和13时24％（重量）用于容器玻璃组合物从添加硬硼酸钙石的用石灰石（碳酸钙）的同时置换源自高达所研究的眼镜100％它的12.24％（重量）的最大水平掺入导致在能量有效 ，成本效益和环境友好型玻璃熔化过程。

    ENERGY EFFICIENT SODA LIME SILICATE GLASS COMPOSITIONS USING BORAX PENTAHYDRATE
    7.
    发明公开
    ENERGY EFFICIENT SODA LIME SILICATE GLASS COMPOSITIONS USING BORAX PENTAHYDRATE 审中-公开
    ENERGIEEFFIZIENTE ATEMKALK-SILIKATGLAS-ZUSAMMENSETZUNGEN UNTER VERWENDUNG VON BORAX-PENTAHYDRAT

    公开(公告)号：EP2958866A1

    公开(公告)日：2015-12-30

    申请号：EP14708334.9

    申请日：2014-01-15

    申请人： Council of Scientific & Industrial Research

    发明人： KARMAKAR, Basudeb ,  MOLLA, Atiar, Rahaman ,  TARAFDER, Anal ,  SEN, Ranjan

    IPC分类号： C03C1/02 ,  C03C3/064 ,  C03C3/087 ,  C03C3/091

    CPC分类号： C03C1/02 ,  C03C1/028 ,  C03C3/064 ,  C03C3/091

    摘要： The invention is directed to energy efficient soda lime silicate glass compositions using borax pentahydrate. The invented glasses have the compositions in the ranges: B
    2 O
    3 = 7.19-51.74 wt.%, SiO
    2 = 22.68-74.62 wt.%, Na
    2 O = 13.0-23.5 wt.%, CaO = 0.0-10.5 wt.%, K
    2 O = 0.03-0.3 wt.%, Al
    2 O
    3 = 0.15-1.3 wt.%, MgO = 0.43-4.0 wt.%, and Fe
    2 O
    3 +TiO
    2 = 0.05-0.12 wt.%. The evaluated properties of the glasses have revealed that these invented glasses are suitable for manufa turing improved quality container glasses, float glasses and glasses for ophthalmic lens blanks as well. The addition of borax pentahydrate originated B
    2 O
    3 at its optimum level (28.5 - 30.3 wt.% B
    2 O
    3 ) is found to reduce the glass melting temperature by 150-200°C. This lowering of glass melting temperature substantially saves energy and reduces the production cost; hence the compositions are energy efficient and cost effectives. It eliminates the use of soda ash and limestone, so it reduces the carbon dioxide (CO
    2 ) emission and thereby global warming; thus these compositions are environmentally friendly as well.

    摘要翻译： 本发明涉及使用硼砂五水合物的能量效率钠钙硅酸盐玻璃组合物。 本发明的玻璃具有以下范围的组成：B 2 O 3 = 7.19-51.74重量％，SiO 2 = 22.68-74.62重量％，Na 2 O = 13.0-23.5重量％，CaO = 0.0-10.5重量％，K 2 O = 0.3重量％，Al 2 O 3 = 0.15-1.3重量％，MgO = 0.43-4.0重量％，Fe 2 O 3 + TiO 2 = 0.05-0.12重量％。 眼镜的评估性能已经表明，这些发明的眼镜也适用于制造改进的质量容器眼镜，浮法眼镜和用于眼镜片坯料的眼镜。 发现在其最佳水平（28.5-30.3重量％B2O3）下加入起始于B2O3的硼砂五水合物将玻璃熔融温度降低150-200℃。 这种降低玻璃熔融温度基本上节省了能源并降低了生产成本; 因此组合物具有节能和成本效益。 它消除了使用苏打灰和石灰石，从而减少二氧化碳排放，从而减少全球变暖; 因此这些组合物也是环境友好的。