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Advancements and applications of position-sensitive detector(PSD): a review

Optoelectronics Letters 2024年第6期20卷 330-338页

作者： shaher dwik G.Sasikala S.Natarajan Department of Electronics&Communication Engineering School of Electrical&CommunicationVel Tech Rangarajan Dr.Sagunthala R&D Institute of Science and TechnologyChennai 600062India Department of Computer Science and Engineering Amrita School of ComputingAmrita Vishwa VidyapeethamChennai 601103India1

This paper presents a review of the position-sensitive detector(PSD) sensor, covering different types of PSD and recent works related to this field. Furthermore, it explains the theoretical concepts and provides information about its structure and principles of operation. Moreover, it includes the main information about the available commercial PSDs from different companies, along with a comparison between the common modules. The PSD features include high position resolution, fast response, and a wide dynamic range. These features make it suitable for various fields and applications, such as imaging, spectrometry, spectroscopy and others.

关键词： Advancements and applications of position-sensitive detector a review PSD

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Simulation and implementation of a reconfigurable dual-function pixel

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Optoelectronics Letters 2024年第8期20卷 454-459页

作者： shaher dwik Gurusamy Sasikala Department of Electronics & Communication Engineering School of Electrical & Communication Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science and Technology

This paper presents the simulation and implementation of a reconfigurable pixel that serves both data acquisition and energy harvesting purposes. The main topic focuses on switching between the two operating modes of the photodiode: photoconductive and photovoltaic modes. This proposed model can be used to design novel optical sensors with energy harvesting capability, such as position sensitive device(PSD) and complementary metal oxide semiconductor(CMOS) image sensors, which can extend the battery lifetime of the whole optical system. Thus, we can overcome power supply problems like wiring and changing batteries frequently, especially in hard-to-reach places like space(cube satellites) or even underwater wireless optical communication(UWOC). The proposed pixel architecture offers the advantage of a minimalistic design with only four transistors. Nevertheless, it does come with a drawback in the form of higher noise levels. The simulation was achieved using MATLAB, and the implementation was performed using the programmable system-on-chip(PSo C) microcontroller. The results showed that the functionality of the dual-function pixel is correct, and the scheduling of both energy harvesting and signal sensing functions was successfully achieved.

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