THORLABS PM100USB Operation Manual page 14

PM100USB
The maximum pulse repetition rate depends on the combination of the internal
capacitance of the detector and the load resistor. The display unit has an input
resistor of 1MΩ (like the typical input resistor of an oscilloscope).
Pulse Length
Energy sensors can detect and measure pulses with a duration from sub-nano-
second range to approximately 2 ms. The max. pulse duration depends on
·
the electrical time constant of the sensor, given by detector capacity and load
resistance
·
the thermal time constant of the sensor.
Usually the latter is the more significant.
Wavelength
The sensors are typically calibrated at one wavelength, for other wavelengths a
sensor specific correction curve is stored in the memory in the sensor connector.
The black coating is nearly linear flat over a wavelength range from 185nm to >
25µm; the ceramic coating is also suitable for this wavelength range, but is not
linear over the entire wavelength range.
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