Suppression of the optical crosstalk in a multi-channel silicon photomultiplier array

TL;DR

This paper presents a method to reduce optical crosstalk in silicon photomultipliers by attaching optical filters, especially absorbing near infrared light, which can be easily implemented in relevant applications.

Contribution

The study introduces a practical optical filtering technique to suppress crosstalk in SiPMs, focusing on absorption of near infrared light for improved performance.

Findings

Optical filters significantly reduce crosstalk in SiPMs.

Absorbing near infrared light is crucial for effective suppression.

The method is easily applicable to existing SiPM systems.

Abstract

We propose and study a method of optical crosstalk suppression for silicon photomultipliers (SiPMs) using optical filters. We demonstrate that attaching absorptive visible bandpass filters to the SiPM can substantially reduce the optical crosstalk. Measurements suggest that the absorption of near infrared light is important to achieve this suppression. The proposed technique can be easily applied to suppress the optical crosstalk in SiPMs in cases where filtering near infrared light is compatible with the application.