Photodiode Power Sensor Selection Guide

Newport offers a complete line of optical meters and Photodiode Optical Power Sensors. Our sensor line is very adaptable and can be used to measure power and energy with both free-space and fiber optic inputs. The following tables, in combination with the Detector Performance Charts, should help identify the optical meter/detector combination appropriate for your particular optical measurement needs. It is always a good idea to select a detector that meets your requirements before selecting an optical meter.

Photodiode Optical Power Sensor Families

Our Calibrated Photodiode Power Sensors are available in many form factors, including integrating sphere photodiode sensors, and are NIST-traceable calibrated for use with Newport's complete line of optical power meters. To complete your detection system, Newport also provides a comprehensive set of photodiode sensor accessories including attenuators, fiber-optic adapters, optic adapters and mounting bases. All of Newport's photodiode sensors include the following features:

  • Highest quality photodiodes
  • Low NEP (noise equivalent power) with wide dynamic ranges
  • EMI/RFI shield to minimize noise from environment

Also available from Newport are Oriel sensors for spectroscopy.

Listed below is a summary of Newport's photodiode power sensor product families.

Free Space Photodiode Power Sensors

Fiber-Optic Photodiode Power Sensors

Integrating Sphere Photodiode Power Sensors

Oriel Sensors for Spectroscopy

Mode Repetition Rate Power Level Detector Family
CW N/A 11fW–2W(2) Low-Power Calibrated Photodiode Sensors
918D Series Low-Power Calibrated Photodiode Sensors
CW N/A 100pW–0.2W Fiber Optic Detectors
CW N/A 100 pW–4.5 W(4) Calibrated Integrating Sphere Sensors
CW N/A 1mW–400W Thermopile Laser Power Sensors, 10 - 500 W
Pulsed >10 Hz 1mW–400W (<0.6 J/cm2) Thermopile Laser Power Sensors, 10 - 500 W
Pulsed >100 Hz(1) 1pW–2W(2) (<1 µJ/cm2) Low-Power Calibrated Photodiode Sensors
918D Series Low-Power Calibrated Photodiode Sensors
Pulsed >100 Hz(1) 100pW–0.2W (>1 µJ) Fiber Optic Detectors
Pulsed >100 Hz(1) 100 pW–4.5 W(4) Calibrated Integrating Sphere Sensors

1) Power meter dependent. Minimum 1% duty cycle is recommended.
2) Maximum peak power density for OD3 attenuator that comes with the 818/918D Series detectors is 2W/cm2.
3) Upper power limit depends on several factors, e.g., sphere size, port aperture size and wavelength.
4) These detectors actually measure power, but the energy can be derived by the calculation, energy = power/(rep rate).

Detector Performance Charts

Detector Range Cht-S
Note: The gradient shaded regions of the detector power and energy operating ranges reflect the dependence of the measurement noise floor on the amplifying electronics used with the detector. Newport's optical meters are designed to minimize the noise floor.