概括
紧的宽带阵列波导网格 (AWG) 光谱仪是为近红外天文学而开发的. 这些设备使用化和化二氧化,为先进的传感应用提供高效率和小足迹.
科学领域:
- 光子学和光学工程 光子学和光学工程
- 天文学和天体物理学
- 材料科学 材料科学 材料科学
背景情况:
- 紧宽带光谱仪对于天文观测和传感是必不可少的.
- 严格的要求包括高效率,广泛的操作带宽和极化不敏感性.
研究的目的:
- 设计,制造和表征宽带 (1200-1650 nm) 阵列波导网格 (AWG) 光谱仪.
- 为了比较使用两个低损耗波导平台的性能:化 (Si3N4) 和化二氧化 (化-SiO2).
主要方法:
- 在Si3N4 (矩形波导) 和合SiO2 (方形波导) 上制造AWG光谱仪.
- 对光谱性能,效率和偏振依赖性的实验性表征.
- 对损失组件的分析,特别是光纤与芯片的合.
主要成果:
- 获得的分辨率功率 (λ/Δλ) 约为200,自由光谱范围为200-350nm.
- 添加SiO2的AWG表现出高达79%的峰值效率,极化依赖转移微不足道.
- Si3N4 AWG的峰值效率为~50% (TE模式),纤维与芯片的合是主要的损耗因素.
结论:
- 两台平台上的宽带AWG都适合用于紧的天文光谱仪.
- 这些AWG能够集成到多对象光谱仪和天体光子设备中.
- 化SiO2平台在近红外应用中显示出卓越的效率和极化性能.
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