A new microchannel plate photomultiplier (MCP PMT) has been developed and applied to the time-correlated photon counting technique. The ultrafast MCP PMT with 6 $mu@m capillaries, which is the previous type of MCP PMT, was modified. We introduce the new compact and ultrafast MCP PMT and the high-speed electronics designed to be coupled with the MCP PMT. The newly developed compact ultrafast MCP PMT has achieved a time response of 25 psec of transit time spread and is compact in size. In addition, the high-speed amplifier and electronics module (amplifier and constant fraction discriminator) have been developed to deal with the pulses for the MCP PMT. The performance of these devices and their application are presented in this paper.
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