Angle-Independent Broadband Miniaturized Spectrometers

• Published in: Journal of physics. Conference series Vol. 2809; no. 1; pp. 12023 - 12027
• Main Authors: Zhang, Gongyuan, Ahmed, Mian Aizaz, Dong, Shurong, Yang, Zongyin
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.08.2024
• Subjects: Broadband; Control equipment; Cost analysis; Cost effectiveness; Diffusers; Environmental monitoring; Fabry-Perot interferometers; Fourier transform spectrometers; Incident light; Process controls; Spectral sensitivity; Spectrum analysis
• ISSN: 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/2809/1/012023

Abstract The miniaturized spectrometers are small and lightweight, which allows for integration into portable analytical instruments and consumer electronics, making them ideal for a wide range of applications, including scientific research, industrial process control, environmental monitoring, and healthcare diagnostics. Compared to other types of grating-based or Fourier-transform spectrometers, filter-based miniaturized spectrometers are relatively simple in design and often more cost-effective to manufacture. However, the spectral accuracy of conventional filter-based miniaturized spectrometers is sensitive to incident light angle. Besides, a large number of filters are required for broadband spectral detection in filter-based spectrometers, which increases cost and complexity. Here, we propose an angle-independent broadband miniaturized spectrometer, where the linear variable Fabry-Perot cavity is introduced to maintain spectral performance over a wide spectral range, and a slit combined with a diffuser is adapted to minimize the sensitivity of spectral accuracy to incident light angle. Our study defines a unique pathway to high-performance miniaturized spectrometers and makes them valuable tools for a wide range of applications requiring compact, cost-effective, and high-performance spectral analysis.