Single Stage Ultrafast Laser Inscription of a Side-Polished Fiber-Like Waveguide Sensor
Single Stage Ultrafast Laser Inscription of a Side-Polished Fiber-Like Waveguide Sensor
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DOI：
10.1109/jsen.2011.2168951
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发表时间：
2012-05
影响因子：
4.3
通讯作者：
S. Beecher;R. Thomson;B. Pal;A. Kar
中科院分区：
文献类型：
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作者：
S. Beecher;R. Thomson;B. Pal;A. Kar
利用超快激光刻写(ULI)技术在熔融石英衬底上制作了18 mm长的亚表面光波导。波导在基片表面下方75开始和终止，接近基片中央部分的最小深度。该器件采用一步法制作，光纤对光纤的插入损耗为2.6分贝。当在基片表面涂抹高折射率的油时，偏振平均波导插入损耗增加了3.7dB。这项工作表明，可以使用单个ULI级来制造足够接近衬底表面的光波导，以用于瞬逝场传感应用。
Ultrafast laser inscription (ULI) has been used to fabricate an 18 mm long sub-surface optical waveguide in fused silica. The waveguide started and terminated 75 below the substrate surface, approaching it to a minimum depth of for the central section. The device was fabricated in a single step, exhibiting a fiber-to-fiber insertion loss of 2.6 dB. When a high refractive index oil was placed on the substrate surface, the polarization-averaged waveguide insertion loss increased by 3.7 dB. This work demonstrates that a single ULI stage can be used to fabricate optical waveguides sufficiently close to a substrate surface for evanescent field sensing applications.