光学
飞秒
材料科学
斑点图案
散射
激光器
波长
分光计
光散射
瑞利散射
光电子学
散斑噪声
纳米结构
物理
纳米技术
作者
Rui Cai,Yao Xiao,Xiaolin Sui,Yongyi Li,Ziyan Wu,Jie Wu,Guoliang Deng,Hao Zhou,Shouhuan Zhou
出处
期刊:Optics Letters
[The Optical Society]
日期:2023-06-14
卷期号:48 (15): 3961-3961
被引量:4
摘要
Miniature spectrometers have the advantage of high portability and integration, making them quick and easy to use in various working environments. The speckle patterns produced by light scattering through a disordered medium are highly sensitive to wavelength changes and can be used to design high-precision wavemeters and spectrometers. In this study, we used a self-organized, femtosecond laser-prepared nanostructure with a characteristic size of approximately 30–50 nm on a sapphire surface as a scattering medium to effectively induce spectral dispersion. By leveraging this random scattering structure, we successfully designed a compact scattering wavelength meter with efficient scattering properties. The collected speckle patterns were identified and classified using a neural network, and the variation of speckle patterns with wavelength was accurately extracted, achieving a measurement accuracy of 10 pm in multiple wavelength ranges. The system can effectively suppress instrument and environmental noise with high robustness. This work paves the way for the development of compact high-precision wavemeters.
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