Replace your expensive APD, PMT or LN2 cooled IR Detector
Due to their very high sensitivity the FEMTO FWPR-20 series photoreceivers can replace APDs, PMTs and cooled Ge photodiodes in many applications. No expensive high voltage power supply or cooling is required.
The FWPR-20-SI offers high quantum efficiency in the visible and near infrared similar to that of APD based single photon counting modules. In applications where timing is uncritical, e.g. when the signal of a photon counter is integrated for a few 10 ms or more the FWPR-20-SI photoreceiver achieves a comparable signal-to-noise ratio.
For NIR spectroscopy the InGaAs model FWPR-20-IN achieves similar results as a much more expensive and complex system based on a liquid nitrogen cooled Germanium detector with external amplifier. As a result of the already integrated very low-noise high-gain amplifier signals in the Volt range can be achieved directly at the output of the series FWPR-20 Femtowatt Photoreceiver.
Application
Fluorescence Measurements
Spectroscopy
Electrophoresis
Chromatography
Replacement for Photomultiplier Tubes (PMTs), Avalanche Photodiodes (APDs) and Liquid Nitrogen Cooled Germanium Photodiodes

Ultra-High Sensitivity and Very Low Noise
The series FWPR-20 Photoreceivers combine low-noise Si or InGaAs photodiodes with a specially designed transimpedance amplifier with extremely high gain of up to 1012 V/A and very low noise. This unique combination results in a photoreceiver with Femtowatt sensitivity due to its exceptional low NEP of minimum 0.7 fW/√Hz. Direct detection of optical powers down to ca. 50 fW is possible and when combined with an optional FEMTO Lock-In Amplifier even sub-Femtowatt sensitivity can be achieved.

Ultra-Low-Noise - Min. NEP 0.7 fW/√Hz
Transimpedance Amplifier with High Gain up to 1012 V/A Included
Wavelength Range from
320 nm to 1700 nm

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