Compare Model Drawings, CAD & Specs Wavelength Range Maximum Conversion Gain Peak Responsivity NEP Saturation Power Availability Price
320-1000 nm 350 V/W 0.5 A/W 31 pW/√Hz 2 mW
900-1700 nm 700 V/W 1.0 A/W 20 pW/√Hz 1 mW


  • Detector Diameter
    1601FC-AC: 0.4 mm
    1611FC-AC: 0.1 mm
  • Detector Material
    1601FC-AC: Silicon
    1611FC-AC: InGaAs
  • Detector Type
  • 3 dB Bandwidth
    30 kHz to 850 MHz (1611) and 1 GHz (1601)
  • Fiber-Optic Connector
  • Fiber Type
    Singlemode or Multimode
  • Maximum Transimpedance Gain
    700 V/A
  • Rise Time
    400 ps
  • Output Connector
  • Output Impedance
    50 Ω
  • DC Bias Monitor Bandwidth
    20 kHz
  • DC Bias Monitor Transimpedance Gain
    -10 V/mA
  • Power Requirements
    ±15 VDC, 250 mA
  • Thread Type
    8-32 (includes M4 adapter)


Silicon or InGaAs Versions

The Silicon model (1601) provides wavelength coverage from 320-1000 nm, and the InGaAs model (1611) provides coverage from 900-1700 nm. This enables wide bandwidth, low-noise detection of signals distributed over fiber-optic cables or found in high resolution spectroscopy, fiber-optic sensors, optical metrology, and many other applications.

High Transimpedance Gain and Low Noise

Because of their high transimpedance gain and low noise-equivalent power (NEP), they offer the best in sensitivity for signals with rise and fall times as short as 0.5 ns. This high sensitivity, combined with their high-level output, reduces the effects of downstream noise sources.

Typical frequency response of the 1601-AC (blue) and the 1611-AC (black).

AC Coupled

These photoreceivers are AC-coupled with a low-frequency roll-off at 30 kHz. A convenient DC-photocurrent monitor output makes alignment easy. The monitor output has a 20-kHz bandwidth and a transimpedance gain of 10 V/mA.

RF Shielding

Careful RF shielding and filtering of power-supply inputs eliminate electromagnetic interference, even in laboratories with Q-switched lasers and other noisy equipment.