50 mV

Crosstalk pulses

50 mV

10 ns 10 ns

Previous product (3 × 3 mm, 50 μm pitch) S13360-3050CS (3 × 3 mm, 50 μm pitch)

Hamamatsu MPPC

What is MPPC?

The MPPC (multi-pixel photon counter) is a type of photosensor called SiPM (silicon photomultiplier). It is a photon-counting

device using multiple APD (avalanche photodiode) pixels operating in Geiger mode.

Although essentially an opto-semiconductor device, it has excellent light receiving capability and can be used in various

applications for detecting extremely weak light at the photon counting level.

The MPPC operates on low voltage and features high gain, high photon detection efciency, high-speed response, excellent

time resolution, and wide spectral response range. It achieves the high-level performance required in photon counting. It is also

immune to magnetic elds, highly resistant to mechanical shocks and the like, and will not suffer from “burn-in” by incident light

saturation, which are advantages unique to solid-state devices.

Features of Hamamatsu MPPC

When an MPPC detects photons, the output may contain false signals, namely afterpulse and crosstalk, that are separate from

the output pulses of the incident photons. The MPPC for precision measurement maintains high photon detection efciency

while featuring low afterpulse, low crosstalk, and low dark count.

FEATURE 1

Low crosstalk

The pixel that detects photons may affect other pixels, making them produce pulses separate from output pulses. This

phenomenon is called crosstalk. The MPPC for precision measurement employs a structure that suppresses the occurrence of

crosstalk.

This has drastically reduced crosstalk in comparison with previous products (rate of occurrence reduced from 44 % to 3 %).