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Femtosecond-laser micromachined optical waveguides in Bi_4Ge_3O_(12) crystals

机译:Bi_4Ge_3O_(12)晶体中的飞秒激光微加工光波导

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摘要

The optical waveguides in Bi_4Ge_3O_(12) (BGO) crystals in both depressed-cladding and dual-line configurations have been produced using femtosecond-laser micromachining. The guiding properties and thermal stabilities of the BGO waveguides have been investigated for both geometries, showing different performance of the fabricated structures. Both depressed-cladding and dual-line waveguides support guidance along both TE and TM polarizations. Thermal annealing treatments up to 600℃ reduce the propagation loss of dual-line waveguides to as low as 0.5 dB/cm, while the cladding waveguide is only stable under thermal treatment not higher than 260℃, reaching a propagation loss of 2.1 dB/cm.
机译:使用飞秒激光微加工技术制造出了凹陷包层和双线配置的Bi_4Ge_3O_(12)(BGO)晶体中的光波导。已针对两种几何结构研究了BGO波导的导引特性和热稳定性,显示了制造结构的不同性能。凹陷包层波导和双线波导都支持沿TE和TM极化的引导。高达600℃的热退火处理将双线波导的传输损耗降低至0.5 dB / cm,而包层波导仅在不高于260℃的热处理下才稳定,达到2.1 dB / cm的传输损耗。

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