Mechanical Housing And Instrumental Apparatus

To reduce the dark counts to a few counts per second it is mandatory to operate the SPAD at temperatures below 0°C.

The mechanical housing able to host the packaged detector has been designed to work under vacuum conditions. To cool the SPAD, a two stage Peltier module has been used as well as hydrophilic material (Zeolite) to adsorb contaminating molecules and preserve vacuum integrity. Figure 1 shows the mechanical housing hosting the SPAD detector.

Figure 1. Mechanical housing hosting the SPAD packaged detector.

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