Compare Model Drawings, CAD & Specs Wavelength Range 3 dB Bandwidth Fiber Type Rise Time Availability Price
630-1620 nm 15 kHz to 38 GHz Singlemode 12.5 ps
800-865 nm 15 kHz to 22 GHz Multimode 16.5 ps


  • Detector Material
    1474-A: InGaAs
    1484-A-50: GaAs
  • Detector Type
  • Fiber-Optic Connector
  • Core Diameter
    1474-A: 9 µm
    1484-A-50: 50 µm
  • Maximum Conversion Gain
    -65 V/W
  • NEP
    38 pW/√Hz
  • Dark Noise
    590 µVrms
  • Saturation Power
    2 mW
  • Output Connector
    Anritsu K
  • Output Impedance
    50 Ω
  • DC Bias Monitor Bandwidth
    15 kHz
  • DC Bias Monitor Transimpedance Gain
    1 V/mA
  • DC Bias Monitor Output
  • DC Bias Monitor Output Impedance
    10k Ω
  • Power Requirements
    ±12-15 VDC, 100 mA
  • Operating Temperature Range
    10-35 °C


High Speed and High Dynamic Range

In Model 1474-A an InGaAs PIN photodiode is followed by a low-noise, linear, high-bandwidth amplifier to provide a 38 GHz bandwidth. In Model 1484-A-50 a larger GaAs photodiode is followed by the same amplifier to provide a 22 GHz bandwidth.

Singlemode or Multimode Fiber

In models with single-mode fiber the optical signal is delivered to the PIN photodiode through a 0.1 m, 9-um core optical fiber, while in the Model 1484-A-50 the signal is delivered through a 50-µm core graded-index multimode fiber of the same length. An internal lens in the 1484-A-50 focuses the light onto the small high-speed PIN photodiode. 

Typical Responsivity of 1474-A

Typical Responsivity of 1484-A-50

Model 1474-A Receiver Frequency Response

Model 1484-A-50 Receiver Frequency Response

Instrument Quality in a Small Package

The small size of the modules allows you to connect them directly to your test instrument or another high-speed component. This eliminates the need to follow the photoreceiver with coaxial cable, which can distort time-domain waveforms and attenuate CW microwave signals.

Low-Noise Amplifier

The amplifier combines moderate gain and low noise to reduce the input-referred noise floor of your system. It also maintains linearity at high output levels, providing a high dynamic range.