Ultralow-loss silica glass and optical fibers using the same
    194.
    发明授权
    Ultralow-loss silica glass and optical fibers using the same 有权
    超低损耗石英玻璃和使用其的光纤

    公开(公告)号:US06153546A

    公开(公告)日:2000-11-28

    申请号:US229582

    申请日:1999-01-13

    Abstract: This ultralow-loss glass is characterized in that high purity silica glass contains 1 to 500 wt.ppm of at least one network modifying oxide. It is assumed that the network modifying oxide appropriately loosens the tetrahedral network structure of silica and hence Rayleigh scattering is decreased. Examples of the network modifying oxide include Na.sub.2 O, K.sub.2 O, Li.sub.2 O, MgO, CaO, and PbO. Since Rayleigh scattering losses are minimal in comparison with those of high purity silica glass, this impurity-added silica glass is excellent as a base material of a glass fiber for a long-distance transmission.

    Abstract translation: 这种超低损耗玻璃的特征在于,高纯度二氧化硅玻璃含有1至500重量ppm的至少一种网络改性氧化物。 假设网络修饰氧化物适当地松散二氧化硅的四面体网络结构,因此瑞利散射降低。 网络改性氧化物的实例包括Na 2 O,K 2 O,Li 2 O,MgO,CaO和PbO。 由于与高纯度二氧化硅玻璃相比,瑞利散射损失最小,所以这种添加了杂质的石英玻璃作为用于长距离传输的玻璃纤维的基材是优异的。

    Optical member of synthetic quartz glass for excimer lasers and method
for producing same
    199.
    发明授权
    Optical member of synthetic quartz glass for excimer lasers and method for producing same 失效
    用于准分子激光的合成石英玻璃的光学元件及其制造方法

    公开(公告)号:US5364433A

    公开(公告)日:1994-11-15

    申请号:US977397

    申请日:1993-05-15

    Abstract: A synthetic quartz glass optical member for an ultraviolet laser, suitably applicable as a stepper lens of a lithographer using an excimer laser beam and other optical members, wherein the quartz glass has a hydroxyl content of 10 to 100 ppm, a chlorine content of 200 ppm or less, a hydrogen content of 1.times.10.sup.16 molecules/cm.sup.3 or less, a homogeneity of refractive index of 5.times.10.sup.-6 or less in terms of .DELTA.n, and a birefringence of 5 nm/cm or less. The optical member can be produced by subjecting a volatile silicon compound to flame hydrolysis with oxyhydrogen flame, depositing the formed particulate silica on a heat-resistant support to prepare a porous silica matrix, heating the matrix in a vacuum as high as 1.times.10.sup.-2 Torr or above to a temperature of 1,400 .degree. C. or above to effect dehydration and degassing, homogenizing the resultant transparent quartz glass into highly homogeneous quartz glass free from striae in at last one direction, molding the highly homogeneous quartz glass, and annealing the molded glass.

    Abstract translation: PCT No.PCT / JP92 / 00821 Sec。 371日期1993年3月15日 102(e)1993年3月15日PCT提交1992年6月29日PCT公布。 公开号WO93 / 00307 日期:1993年1月7日。一种用于紫外线激光的合成石英玻璃光学元件,适用于使用准分子激光束和其它光学部件的平版印刷机的步进透镜,其中石英玻璃的羟基含量为10〜100ppm ,氯含量为200ppm以下,氢含量为1×1016分/ cm 3以下,折射率均匀性为DELTA n为5×10 -6以下,双折射为5nm / cm以下。 光学构件可以通过使挥发性硅化合物用氢氧焰火焰水解,将形成的颗粒二氧化硅沉积在耐热载体上以制备多孔二氧化硅基质来制造,在高达1×10 -2乇的真空中加热基质 以上至1400℃以上的温度进行脱水脱气,将得到的透明石英玻璃均匀化成最后一个方向不含条纹的高度均匀的石英玻璃,成型高度均匀的石英玻璃,退火成型玻璃 。

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