Compare Model Drawings, CAD & Specs Availability Price
Fiber-Optic Detector, 500-1630 nm, 25 GHz, FC Singlemode
Fiber-Optic Detector, High Speed, 850-1630 nm, 25 GHz, FC 50 µm Multimode
4 Weeks
4 Weeks
High Speed Photodetector, 530-870 nm, 15 GHz, FC 62.5 µm Multimode



GaAs Photodetectors for Visible Wavelengths

Models 1480 and 1481 utilize a GaAs PIN photodetector to provide wavelength coverage from 400 to 870 nm.  It is offered in singlemode, 50 μm core multimode, or 62.5 core μm multimode versions.

InGaAs Photodetectors for IR Wavelengths

Model 1414 utilizes an InGaAs Schottky photodiode providing coverage from 500 to 1630 nm for singlemode fiber versions and 850 to 1630 nm for multimode fiber versions.

GaAs Photodetector Bandwidth

InGaAs Photodetector Bandwidth

Single-mode or Multi-mode fiber-optic Connectors

Choose from FC single-mode or multimode connectors. With optical-fiber input, the photodiode module can be connected directly to an electronic instrument, eliminating the need for an expensive high-frequency microwave cable. Multimode versions have 50-µm-core fiber input and an internal GRIN lens for focusing onto the photodetector. In these MM versions, chromatic dispersion of the GRIN lens decreases the usable wavelength range.

Internal Microwave Housing

An internal microwave housing suppresses noise, pick-up, and other artifacts. Moreover, to limit damage due to excessive voltage or mishandling, these photodiodes have damage-resistant bias circuits. All these photodetectors come equipped with a DC-bias monitor that has a transimpedance gain of 1 mV/µA and a 50-kHz bandwidth.

Compatible with New Focus 20 GHz Amplifiers

By combining these photodetectors with our Model 1422 traveling-wave amplifiers, you can detect microwatt optical signals with 20-GHz bandwidth and minimal distortion.


  • Characterizing the frequency response of pulsed lasers, modulators and transmitters
  • RIN measurements
  • Microwave generation - heterodyne experiments