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Tapered and noncircular hollow glass waveguides

机译：锥形和非圆形空心玻璃波导

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Abstract: Linearly tapered hollow-glass waveguides (HGW) were fabricated using tapered silica glass tubing and wet chemistry techniques. Attenuation constants for these tapered HGWs were found to be higher than for similarly sized non-tapered HGWs, but the tapered guides showed reduced loss on bending. HGWs with rectangular and square cross-sections were also fabricated from non-circular bore silica glass tubing using wet chemistry techniques. These guides were able to maintain linear polarization of CO$-2$/ laser light better than circular bore HGWs fabricated by the same methods, with as high as 97% of the input polarization preserved for a 227 micrometer $MUL 1253 micrometer bore guide. The non-circular bore HGWs had higher attenuation constants than similarly sized circular bore HGWs and sacrificed some spatial purity of the output beam. !10
机译：摘要：利用锥形石英玻璃管和湿化学技术制造了线性锥形中空玻璃波导（HGW）。发现这些锥形HGW的衰减常数高于类似尺寸的非锥形HGW的衰减常数，但是锥形导轨显示出减少的弯曲损耗。还使用湿化学技术由非圆形孔石英玻璃管制造出具有矩形和正方形横截面的HGW。与采用相同方法制造的圆孔HGW相比，这些光导能够更好地保持CO $ -2 $ /激光的线性偏振，对于227微米的$ MUL 1253微米的光导，可以保留高达97％的输入偏振。非圆形孔HGW比类似尺寸的圆形孔HGW具有更高的衰减常数，并且牺牲了输出光束的一些空间纯度。 ！10

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