Chip-integrated Spectroscopy Capable of Temperature Retrieval

We demonstrate a chip-integrated emission spectroscope capable of retrieving the temperature of the light sources. It consists of a single photon detector with low dark counts and a sweeping on-chip filter with 2 pm spectral resolution in the visible and near-infrared regimes. With wildfire sensing...

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Bibliographic Details
Published in:arXiv.org 2024-11
Main Authors: Du, Yifan, Yong Meng Sua, Kumar, Santosh, Zhang, Jiuyi, Li, Xiangzhi, Hu, Yongxiang, Ghuman, Parminder, Huang, Yuping
Format: Article
Language:English
Subjects:
Emission
Environmental monitoring
Hollow cathodes
Infrared filters
Light sources
Line spectra
Near infrared radiation
Plasma physics
Retrieval
Spectral resolution
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Summary:We demonstrate a chip-integrated emission spectroscope capable of retrieving the temperature of the light sources. It consists of a single photon detector with low dark counts and a sweeping on-chip filter with 2 pm spectral resolution in the visible and near-infrared regimes. With wildfire sensing applications in mind, we test our system with a hollow cathode lamp to simulate the K-line emission, and show how the models of Doppler and collision broadening in the plasma can be used for temperature retrieval. With favorable device parameters, high spectral resolution, and a novel temperature retrieval capability, our technique may find broad applications in environmental monitoring, astrophysics, plasma physics, and so on.
ISSN:2331-8422