The 2151 Femtowatt Silicon Photoreceiver is ideal when you need the ultimate in low-light-level detection in the 300 to 1050 nm range. When used with a chopper and a lock-in amplifier, these receivers can easily achieve sensitivity levels in the femtowatt range. These receivers provide amazing amounts of gain and yet are easy to use, making the most difficult spectroscopy or fluorescence experiment a snap. 8-32 mounting thread. M4 metric adaptor and tool now included. Connect to a 1 MΩ oscilloscope input.
These photoreceivers provide amazing amounts of gain (up to 2x1011 V/W) while being simple to use, making the most difficult spectroscopy or fluorescence experiment easy. Their high-gain and low-noise performance is achieved by careful selection of the amplifier-resistor pair. A large feedback resistor provides the high-gain values, while an ultra quiet amplifier keeps noise to a minimum. These photoreceivers are sensitive from the UV all the way to the IR, giving you the flexibility to work wherever you get the most signal. Their 1-mm photodetector diameter even makes alignment easy.
You can easily switch among the three fixed gain settings of 2x1011 (AC), 2x1010 (AC), and 2x1010 (DC) V/A. The two AC settings have a low-frequency roll-off at 30 Hz and eliminate DC drifts.
Powered by a single 9-V battery, these photoreceivers do not require cooling or high-voltage power supplies. Moreover, only a single coaxial cable is needed to connect the photodetector to other instruments. This elimiates ground loops, the most common source of noise. A non-conductive pad electrically isolates the case from the table, further eliminating noise pickup.
Newport offers accessories that can be used to attach a filter or optical fiber to these photoreceivers. To filter out unwanted background signals, a spike or band-pass filter can be mounted directly on the photodetector with the
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