Selection guide - January 2014 MPPC MPPC Modules ® Compact opto-semiconductors with excellent photon-counting capability Multi-Pixel Photon Counter HAMAMATSU PHOTONICS K.K.

MPPC MPPC Modules New type of Si photon-counting device The MPPC (multi-pixel photon counter) is a new type of photon-counting device made up of multiple APD (avalanche photodiode) pixels operated in Geiger mode. The MPPC is essentially an opto-semiconductor device with excellent photoncounting capability and which also possesses great advantages such as low voltage operation and insensitivity to magnetic fields. Features · Excellent photon-counting capability (excellent detection efficiency versus number of incident photons) · Small size · Room temperature operation · Low bias (below 80 V) operation...

The MPPC (multi-pixel photon counter) is one of the devices called Si-PM (silicon photomultiplier). It is a new type of photon-counting device using multiple APD (avalanche photodiode) pixels operating in Geiger mode. Although the MPPC is essentially an opto-semiconductor device, it has excellent photon-counting capability and can be used in various applications for detecting extremely weak light at the photon counting level. The MPPC operates on a low voltage and features a high gain, high photon detection efficiency, high-speed response, excellent time resolution, and wide spectral response...

Hamamatsu MPPC Structure Figure 1 shows a structure of an MPPC. The basic element (pixel) of an MPPC is a combination of Geiger mode APD and quenching resistor, and a large number of these pixels are electrically connected and arranged in two dimensions. [Figure 1] Structure Geiger-mode APD pixel Operating principle Quenching resistor Photon counting Light has the properties of both a particle and a wave. When the light level becomes extremely low, light behaves as discrete particles (photons) allowing us to count the number of photons. Photon counting is a technique for measuring the number...

[Figure 6] Pulse height spectrum when using charge amplifier (S12571-050C, M=1.25 × 106) Basic operation Each pixel in the MPPC outputs a pulse at the same amplitude when it detects a photon. Pulses generated by multiple pixels Frequency (number of events) are output while superimposed onto each other. For example, if four photons are incident on different pixels and detected at the same time, then the MPPC outputs a signal whose amplitude equals the height of the four superimposed pulses. Each pixel outputs only one pulse and this does not vary with the number of incident photons. So the number...

[Figure 9] Photon detection efficiency vs. overvoltage Photon detection efficiency (%) S12571-050C 50 μm pitch Previous product 50 μm type Previous product 25 μm type [Figure 8] Afterpulses vs. overvoltage S12571-100C 100 μm pitch Previous product 100 μm type Overvoltage (V) Note: Photon detection efficiency does not include crosstalk and afterpulses. White circle points mean the recommended overvoltage. Previous product [Table 1] Recommended overvoltage Previous type Improved product High photon detection efficiency MPPC has peak sensitivity at a wavelength around 400 to 500 nm. MPPC sensitivity...

General measurement type S12571-050C (pixel pitch: 50 μm) [Figure 12] Crosstalk vs. overvoltage (Typ. Ta=25 °C) Previous product 50 μm pitch This phenomenon is called crosstalk. Hamamatsu has drasti- cally reduced crosstalk in precision measurement MPPC by Metal quenching resistor creating barriers between pixels. Due to the use of a metal quenching resistor, the temperature [Figure 11] Pulse waveforms General measurement type S12571-050C (pixel pitch: 50 μm) (M=1.25 × 106) coefficient of the resistance is reduced to 1/5 of the previous type. This suppresses changes in the falling pulse edge...

MPPC lineup For general measurement NEW These MPPCs are suitable for general low-light-level measurement. Type no. Previous product High speed, wide bandwidth High photon detection efficiency Surface mount type Surface mount type High-speed, wide dynamic range NEW This type of MPPC has a large number of pixels, making it suitable for applications where background light may cause saturation. Type no. Previous product High photon detection efficiency High speed, wide bandwidth High photon detection efficiency High speed, wide bandwidth Ceramic Surface mount type Ceramic Surface mount type For very...

MPPC arrays NEW These are monolithic arrays comprised of multiple 3 × 3 mm MPPCs formed on a single chip. Type no. Previous product High photon detection efficiency Note: Please consult us about specifications of the above products. CSP (chip size package) type NEW These MPPCs employ a structure that reduced insensitive portions formed along the periphery of the photosensitive area. The 4-side buttable structure allows them to be arrayed in two dimensions at equal intervals. Type no. Previous product Surface mount type High photon detection efficiency Surface mount type Surface mount type With...

MPPC for general measurement S12571-025, -050, -100C/P The S12571 series are general-purpose MPPC with drastically reduced afterpulses compared to our previously marketed products. By widening the operating voltage range and improving the time resolution and photon detection efficiency, the S12571 series offer the characteristics needed for a variety of applications. These MPPCs have a photosensitive area of 1 × 1 mm and are available in a ceramic package or surface mount type. · MPPC modules: C11205-150/-350 (analog output type) The following characteristics were measured at the operating voltage...

Photon detection efficiency vs. overvoltage (Typ. Ta=25 °C) Crosstalk probability vs. overvoltage Crosstalk probability (%) Photon detection efficiency (%) MPPC characteristics vary with the operating voltage. The 25 μm pixel pitch type is suitable for applications requiring a wide dynamic range, because it has a large number of pixels and provides narrow-width output pulses. The 100 μm pixel pitch type is suitable for applications where high gain is essential. Although increasing the operating voltage improves the photon detection efficiency and time resolution, it also increases the dark count...