Ultra-compact scalable spectrometer with low power consumption

作者：Junying Li, Chunlei Sun, Hui Ma, Bo Tang, Mengxue Qi, Jialing Jian, Zezhao Ju, Hongtao Lin, Lan Li · 发表于：Optics Express · 年份：2023 · DOI：10.1364/oe.499892 · 被引用次数：7 · 研究领域：Photonic and Optical Devices

An ultra-compact on-chip spectrometer was demonstrated based on an array of add-drop micro-donut resonators (MDRs). The filter array was thermally tuned by a single TiN microheater, enabling simultaneous spectral scanning across all physical channels. The MDR was designed to achieve large free spectral ranges with multimode waveguide bends and asymmetric coupling waveguides, covering a spectral range of 40 nm at the telecom waveband with five physical channels (which could be further expanded). Benefiting from the ultra-small device footprint of 150 µm 2 , the spectrometer achieved a low power consumption of 16 mW. Additionally, it is CMOS-compatible and enables mass fabrication, which may have potential applications in personal terminals and the consumer industry.