- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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Aberrated Microlenses to Reduce Crosstalk in Free Space Optical Interconnects Systems
摘要： A free space optical interconnects system that uses Gaussian beams and focusing microlenses with spherical aberration has been considered. Numerical results show that the use of microlenses with negative spherical improves the signal-to-crosstalk ratio of the interconnects system at some optimum positions of the detector array. An expression for output field at the detectors plane is derived and used to evaluate the signal-to-crosstalk ratio.
关键词： lens spherical aberration,optical crosstalk,free space optical interconnects
更新于2025-09-23 15:23:52
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0.16 μm–BCD Silicon Photomultipliers with Sharp Timing Response and Reduced Correlated Noise
摘要： Silicon photomultipliers (SiPMs) have improved significantly over the last years and now are widely employed in many different applications. However, the custom fabrication technologies exploited for commercial SiPMs do not allow the integration of any additional electronics, e.g., on-chip readout and analog (or digital) processing circuitry. In this paper, we present the design and characterization of two microelectronics-compatible SiPMs fabricated in a 0.16 μm–BCD (Bipolar-CMOS-DMOS) technology, with 0.67 mm × 0.67 mm total area, 10 × 10 square pixels and 53% fill-factor (FF). The photon detection efficiency (PDE) surpasses 33% (FF included), with a dark-count rate (DCR) of 330 kcps. Although DCR density is worse than that of state-of-the-art SiPMs, the proposed fabrication technology enables the development of cost-effective systems-on-chip (SoC) based on SiPM detectors. Furthermore, correlated noise components, i.e., afterpulsing and optical crosstalk, and photon timing response are comparable to those of best-in-class commercial SiPMs.
关键词： Silicon photomultiplier (SiPM),photon counting,photon number resolution,optical crosstalk,time-correlated single-photon counting (TCSPC),afterpulsing
更新于2025-09-23 15:21:01
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A normally-distributed crosstalk model for silicon photomultipliers
摘要： Optical crosstalk (OCT) in silicon photomultipliers (SiPM) occurs when photon detection in a microcell leads to the production of further photons that are also detected. Various models have been considered to predict experimental data with varying degrees of success. In this paper, we introduce the Normally-Distributed Crosstalk Model (NDCM), where the probability of triggering additional microcells is given by a 2-d normal distribution with a standard deviation of ??: a device-specific parameter representing OCT photon propagation path length in terms of microcell pitch. Monte Carlo (MC) simulations of NDCM are compared to existing models and experimental data from the CHEC-S camera developed for the Cherenkov Telescope Array, which suggests that OCT occurs with a ?? ≈ 5 microcells in this device.
关键词： SiPM,Silicon photomultiplier,Optical crosstalk
更新于2025-09-23 15:21:01