Stacked polymer waveguide type fan-in/fan-out device for dense multi-core fibre
Stacked polymer waveguide type fan-in/fan-out device for dense multi-core fibre
复制标题
用于密集多芯光纤的堆叠聚合物波导型扇入/扇出装置
DOI：
10.1049/iet-opt.2014.0137
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
Tatsuhiko Watanabe and Yasuo Kokubun
中科院分区：
文献类型：
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作者：
Tatsuhiko Watanabe and Yasuo Kokubun
介绍了一种用于19芯无耦合多芯光纤(MCF)的紧凑型扇入/扇出光波导器件。其核心材料为聚甲基丙烯酸甲酯，包层材料为紫外光固化的无溶剂齐聚物环氧树脂。由于低聚物在紫外光固化后不会收缩，因此芯脊上的覆层表面变平了，可以对多层进行层压。通过精确控制包层材料的旋涂条件，实现了磁芯在垂直方向上的精确对准。从一根19芯光纤到19根单芯光纤的插入损耗测得为20分贝，所有相邻纤芯的串扰总和低于−40分贝。由纤芯位置偏移和端面光斑尺寸失配引起的耦合损耗为<；1.8分贝。结果表明，选择合适的折射率对比度和低吸收损耗的聚合物材料对，可以改善耦合损耗和插入损耗。
A compact fan‐in/fan‐out waveguide device for 19‐core uncoupled multi‐core fibre (MCF) was demonstrated using laminated polymer waveguide. The core was made of poly‐methyl‐methacrylate and the cladding was made of ultra‐violet (UV) cured epoxy resin which is solvent‐free oligomer. Since the oligomer does not shrink after UV‐curing, the surface of the cladding over the core ridge was flattened and the multiple layers can be laminated. The accurate core alignment in the vertical direction was realised by controlling the spin‐coat condition of cladding material precisely. The insertion loss from a 19‐core fibre to 19 single‐core fibres was measured to be <20 dB and the sum of the cross‐talk from all neighbouring cores was lower than −40 dB. The coupling loss which is caused by the offset of the core position and the spot size mismatch at the facet between the MCF core and the waveguide was <1.8 dB. It was shown that the coupling loss and the insertion loss can be improved by adopting a properly selected pair of polymer materials with appropriate value of index contrast and low absorption loss.