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Balanced Receiver, 5 mm Germanium Detector, 800-1700 nm, 1 MHz
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Reduces Common-Mode Noise by 40 dB

The balanced photoreceivers work by subtracting the photocurrent from two well-matched photodetectors. Common-mode noise that is present on both the reference and signal beams (such as laser intensity noise) is cancelled out and doesn’t appear as part of the signal. Any imbalance between the photocurrents generated by the reference and signal photodetectors, whether intentional or unintentional, is amplified and is seen as the signal. This reduces common-mode noise by up to 40 dB so that you can see your signal.

Large Area Diodes for Easy Alignment

These balanced optical receivers take the headache out of aligning and re-aligning your beams onto the photodetectors with their large detector diameters. This allows you to tweak your experiment without worrying about beam wander.  Model 2307 has an 8 mm diameter Silicon photodiode covering 400-1070 nm. Model 2317 has an 5 mm diameter Germanium photodiode covering 800-1700 nm.

Adjustable Gain Settings

The three-setting gain adjustment allows you to keep your signal from going off scale while you’re adjusting your experiment or measurement.