研究目的
展示一种单片集成磁光隔离器,其插入损耗和隔离比显著改善,这标志着光子集成电路(PIC)中实现实用化片上隔离的关键一步。
研究成果
一款片上隔离器演示实现了3.0分贝的创纪录低插入损耗和40分贝的隔离比,这标志着单片集成光学隔离器领域的重大进展。这种新型器件架构有效消除了寄生光损耗并增强了波导非互易性,是实现光学隔离器件与大规模光子电路平面集成的关键一步。
研究不足
基于谐振器的隔离器工作带宽较窄,限制了其与宽带可调谐激光器的应用。此外,磁光氧化物薄膜中吸收导致的光损耗高于先前在多晶Ce:YIG薄膜中的测量值,表明仍有进一步改进的空间。
该实验方案涉及在沉积的Ce:YIG薄膜上设计和制备条形加载波导隔离器,采用成分优化的硫系玻璃作为波导芯材,并通过灰度光刻工艺制作低损耗锥形结构。该器件经插入损耗和隔离比测试,展现出优异性能。
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Optical vector analyzer
OVA
Luna Innovations Inc.
Used in conjunction with an erbium doped fiber amplifier as the interrogation light source for device characterization.
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Newport Autoalign station
Newport
Used for device characterization, enabling light coupling in and out of the waveguides via end fire coupling through tapered fibers.
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Tapered fibers
Nanonics Imaging Ltd.
Used for light coupling in and out of the waveguides during device characterization.
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Erbium doped fiber amplifier
Amonics Ltd.
Used as part of the interrogation light source for device characterization.
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Index matching fluid
Cargille-Sacher Laboratories Inc.
Used to minimize Fresnel reflection in fiber-to-chip coupling during device characterization.
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