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What are xInGaAs and V-InGaAs Detectors?

These are two variations on the standard InGaAs (Indium-Gallium-Arsenide) photodiode.

The xInGaAs type has extended IR sensitivity out to 2100nm useful wavelength range. The short wavelength cut-off is the same as standard InGaAs.

The V-InGaAs type has extended visible range sensitivity down to 400nm useful wavelength range. The long wavelength cut-off is the same as standard InGaAs.

What is a “free beam-” receptacle?

By “free beam”, we mean that the photodiode is openly mounted on the front plate of the unit. This is to allow measurement of free beams (not fibre coupled). This configuration may be inconvenient since the amplifier must be mounted directly in the beam path. If you wish to have a remote detector head, then use the TZA500 (transimpedance amplifier) instead to measure the current from the remote photodiode.

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