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Transverse writing of three-dimensional tubular optical waveguides in glass with a slit-shaped femtosecond laser beam

机译:用狭缝形飞秒激光束横向写入玻璃中的三维管状光波导

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摘要

We report on fabrication of tubular optical waveguides buried in ZBLAN glass based on transverse femtosecond laser direct writing. Irradiation in ZBLAN with focused femtosecond laser pulses leads to decrease of refractive index in the modified region. Tubular optical waveguides of variable mode areas are fabricated by forming the four sides of the cladding with slit-shaped femtosecond laser pulses, ensuring single mode waveguiding with a mode field dimension as small as ~4 μm.
机译:我们报告了基于横向飞秒激光直接写入的掩埋在ZBLAN玻璃中的管状光波导的制造。用聚焦的飞秒激光脉冲照射ZBLAN会导致修改区域的折射率降低。可变模式区域的管状光波导是通过在狭缝的飞秒激光脉冲形成包层的四个侧面而制成的,从而确保模场尺寸小至约4μm的单模波导。

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