Picoharp300_English单光子计数外置USB2.0采集器

The PicoHarp 300 is a high-end, easy-to-use, plug and play Time-Correlated Single Photon Counting (TCSPC) system. It is connected to a PC through a state of the art USB 2.0 high speed interface. A new design approach provides identical, independent input channels. They can be used as detector inputs for coincidence correlation experiments or as start and stop inputs for TCSPC. It allows a multi-stop, forward start-stop operation even at full repetition rate of mode locked lasers with stable repetition rate up to 84 MHz. The design allows high measurement rates up to 10 million counts/sec and provides a highly stable, quartz calibrated time resolution of 4 ps. This time resolution is well matched to micro-channel plate photomultiplier tubes (MCP). Overall IRFs down to 50 ps can be achieved. Both input channels are equipped with constant fraction discriminators (CFD), sensitive on the falling edge. Due to a dual memory architecture, efficient data collection with concurrent measurement and readout can be implemented. The device can also be synchronized with other hardware such as scanners.

A Time-Tagged mode for recording of individual photon events with their arrival time on both channels will be available, allowing the most sophisticated offline analysis of the photon dynamics. As accessories an external router for connection of up to four detectors as well as a fluorescence lifetime imaging controller will be available. External hardware such as monochromator controllers can be controlled via CAN-Bus.

The PicoHarp software for Windows 2000/XP provides functions such as the setting of measurement parameters, display of results, loading and saving of measurement parameters and measurement curves. Important measurement characteristics such as count rate, count maximum, position and peak width are displayed continuously. A comprehensive online help function shortens the users' learning curve. A driver library for custom programming e.g. with LabVIEW is also available as an option. Software upgrades for extended functionality will be available with further product development.

* available as an option
Current software and Developer's Library version: 2.0

The PicoHarp 300 operation software now includes an online ("real-time") - correlator for FCS, which can be extremely useful in setting up and monitoring of FCS experiments. The user interface has been redesigned to provide a better visualisation of the measurement data. The new version now also supports WindowsXP x64 edition. Owners of previous versions receive a free update upon request.