OVER VIEW
Hamamatsu near infrared photomultiplier tubes (NIR-PMT) R5509-42 and -72 have newly developed photocathodes with extended spectral response ranges to 1.4 µm or 1.7 µm where beyond 1.1 µm have been the limit of conventional photocathodes. NIR-PMTs the R5509-42 and -72 not only have these new spectral response ranges, but also have good features of conventional photomultiplier tubes for fast time response and photon counting performance, which allow weak light detection in the near infrared region. They can solve the problems of low sensitivity and slow time response in other conventional near infrared detectors like a germanium diode which is so far commonly used in this range.

FEATURES
●Using a "low power excitation light" allows high-precision measurement not affected by strong excitation light.
High gain and low noise improve the detection limit.
●Flat response from visible to near IR minimize spectral sensitivity correction.
The spectral response covers a wide range from 300 nm to 1.4 µm or 1.7 µm.
●Photoluminescence from a room temperature sample can be measured.
High sensitivity enables weak light emission measurement.
●Time resolved measurement in near IR is realized.
Fast time response (Rise time: 3 ns).