Line-array SWIR image sensor for the next generation of spectroscopy

Short-Wave Infrared (SWIR) line arrays are essential components in high-end spectroscopy, enabling the acquisition of hyperspectral data across the near-infrared and short-wave spectrums. To detect weak intrinsic signals in these ranges, achieving both high sensitivity and high spatial resolution is critical. However, optimizing these parameters often requires a relatively large photosensitive area, which inherently degrades injection efficiency and increases dark current. This article presents advanced design methodologies for Readout Integrated Circuits (ROICs) tailored for InGaAs-based SWIR sensors. We propose specific circuit techniques to mitigate these conflicting requirements, ensuring high-performance signal acquisition without compromising detector efficiency or noise performance.