Compare Model Drawings, CAD & Specs Wavelength Range Maximum Conversion Gain Peak Responsivity NEP Availability Price
In Stock
320-1050 nm 1x1011 V/W 0.5 A/W 16 fW / √Hz
In Stock
800-1700 nm 2x1011 V/W 1.0 A/W 23 fW / √Hz


  • Optical Input
    Free Space
  • Detector Type
  • Detector Material
    2151: Silicon
    2153: InGaAs
  • Detector Diameter
    1.0 mm
  • Bandwidth (-3 dB)
    DC-750 Hz (DC)
    30-750 Hz (AC)
  • Output Connector
    Male BNC
  • Output Impedance
    100 Ω
  • Maximum Transimpedance Gain
    2x1010 V/A (DC Low and AC Low)
    2x1011 V/A (AC High)
  • Power Requirements
    Internal 9-V battery
  • Saturation Power
    2151: 0.5 nW
    2153: 0.25 nW
  • Damage Threshold
    10 mW


Amazing Amounts of Gain

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.

Typical responsivity of Models 2151 (blue) and 2153 (black)

Three Fixed Gain Settings

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.

Battery Powered for Low-noise Performance

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.

Using Filters and Optical Fiber

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 1280 filter holder accessory. Model 1281 is an FC fiber adapter that allows an FC-connectorized fiber to be attached in front of these photoreceivers. Both accessories are sold separately and not included with the photoreceiver.