Compare Model Drawings, CAD & Specs Availability Price
Balanced Fiber-Optic Receiver, Adjustable, 320-1000 nm, 10 MHz, 8-32 [Phase out]
$1,550
Balanced Fiber-Optic Receiver, Adjustable, 320-1000 nm, 10 MHz, M4
$1,550
In Stock
In Stock
Adjustable Balanced Receiver, 320-1000 nm, 10 MHz, Free Space [Phase out]
$1,550
In Stock
In Stock
Adjustable Balanced Receiver, 320-1000 nm, 10 MHz, Free Space, M4
$1,550
In Stock
In Stock
Balanced Fiber-Optic Receiver, Adjustable, 800-1700 nm, 10 MHz, 8-32 [Phase out]
$1,550
Balanced Fiber-Optic Receiver, Adjustable, 800-1700 nm, 10 MHz, M4
$1,550
Adjustable Balanced Receiver, 800-1700 nm, 10 MHz, Free Space [Phase out]
$1,550
In Stock
In Stock
Adjustable Balanced Receiver, 800-1700 nm, 10 MHz, Free Space, M4
$1,550
In Stock
In Stock

Specifications

Features

Reduces Common-Mode Noise by 25 dB

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 25 dB so that you can see your signal.

Silicon or InGaAs Photodiodes

Model 2107 features 0.9 mm diameter Silicon Photodiodes covering 300-1070 nm. Model 2117 features 0.3 mm diameter InGaAs Photodiodes covering 900-1700 nm.  

Adjustable Gain Settings

The 10 MHz three-stage transimpedance amplifier of the 2107 and 2117 Balanced Detectors includes selectable gain and selectable low- and high-pass filters for easy signal optimization. Variable gain in 5 dB steps, ranging from gain of 1 to 3 x 104 settings, allows you to keep your signal from going off scale while you’re adjusting your experiment or measurement.

Control over Pass Bandwidths

The 2107 and 2117 Balanced Detectors are equipped with a 6 dB Low Frequency Corner Adjust knob and a High Frequency Corner Adjust knob. The Low Frequency Corner Adjust knob allows high pass filtering above the cutoff frequency. In conjunction with the High Frequency Corner Adjust knob, which acts as a low pass filter at the high frequency regime, the pair effectively forms an adjustable band pass filter. It is easy to eliminate residual 60-Hz noise and to dampen high frequency noises. The DC÷30 setting prevents your signal from going off-scale due to DC amplitude fluctuations, without attenuating fast signals.

Ideal for Balanced Photodetection

Newport's balanced optical receivers are ideal for optical detection applications that require sensitive measurements and increased signal-to-noise. Balanced photodetection is a method that can very effectively cancel common mode noise and detect small signal fluctuations on a large DC signal. Detection methods in the time domain (such as femtosecond ultrasonics and frequency modulation spectroscopy) and frequency domain (like absorption spectroscopy), and coherent heterodyne detection (such as optical coherence tomography) can be substantially improved by using Newport balanced photoreceivers and can allow detection of signals not otherwise possible with other means. For more information, please see our application note A Survey of Methods Using Balanced Photodetection.

Example OCT Imaging System