The IS1.5-IRG-FPD-800 provides multiple measurement capabilities in a single integrating sphere device: a) a precision photodiode for calibrated average power measurement, b) a fast photodiode for pulse shape characterization on an oscilloscope and a built in SMA fiber adapter, and c) an SMA fiber optic adapter for easy connection to a spectrometer. The IS1.5-IRG-FPD-800 has a small internal diameter of 1.5 inch (38mm), to minimize the pulse stretching effect inherent to integrating spheres, giving it a time constant of 0.7ns. Together with its fast InGaAs photodiode, the IS1.5-IRG-FPD-800 provides a pulse rise time of 0.8ns and a fall time of 5ns.


  • InGaAs & Fast InGaAs
  • 940-1640nm
  • 600nW-3W
  • Ø20mm
  • ±50 deg
  • SMA connector, maximum NA 0.44
  • 67 L x 52 W x 61 D (mm)
  • CE, UKCA, China RoHS
  • InGaAs photodiode, calibrated power measurement
  • 940–1640nm
  • 600nW–3W
  • Smart Head, D15
  • Fast InGaAs photodiode, temporal pulse shape detection
  • 940–1640nm
  • 0.8 nsec
  • 5 nsec
  • 0.14 typ. mA/W
  • 15.5 typ. fA/√Hz
  • Analog current
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I need to measure the power of a diverging beam whose divergence is very asymmetrical; the Fast axis divergence is ± 80 degrees, while the Slow axis divergence is ± 20 degrees. Will the IS6-D integrating sphere work? It’s specified Maximum Beam Divergence is ± 60 degrees.

The IS6-D type integrating spheres (such as IS6-D-VIS, IS6-D-UV, IS6-D-IR) will be good for this as long as you orient the 80 degree divergence in the vertical direction. The IS1.5-VIS-FPD-800 will also work, with the same constraint.

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The damage thresholds for your Integrating Sphere sensors are only given for the sphere surface – what about for the detector?

The damage threshold is given in the datasheet for the sphere inner surface rather than for the detector itself, because the sphere surface will reach its damage threshold long before the detector will. A beam entering the sphere will first hit the inner surface on the opposite side of the sphere, and if at that point the power density is too high it will damage the inner surface of the sphere. From that first "meeting" of the beam with the white diffuse reflective inner sphere surface, it will be diffusely reflected multiple times. Since there is no direct line of sight between the entrance port and the detector, any light reaching the detector has already been uniformly distributed around the inner surface of the sphere, but light in that "first impact" on the sphere wall has not yet been uniformly distributed. Therefore, the "damage threshold" for the device is the maximum power density of the beam as it first hits the inner wall.

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  • Simple

    Program for those who want to use Centauri connected to IS1.5-VIS-FPD-800 or IS1.5-IRG-FPD-800 integrating spheres with LabVIEW 2017.
    Note: In order to work with the application example, it is necessary to install the LabVIEW runtime engine 2017, downloadable from the National Instruments website.


Product Overview: Multifunction Integrating Sphere IS1.5-VIS-FPD-800 Product Overview: Multifunction Integrating Sphere IS1.5-VIS-FPD-800

In many applications such as VCSEL-based LIDAR and facial recognition systems, there is a need to measure multiple parameters of the laser beam at the same time, such as power, spectrum, and temporal pulse shape. Also, capturing and correctly measuring these widely-diverging and slowly-pulsing beams can be very challenging.
The Ophir IS1.5-VIS-FPD-800 Multifunction Integrating Sphere sensor helps you meet these challenges. Get an overview in this video.


Tutorials and Articles

Using Ophir’s IS1.5VIS-FPD-800 Multi-Functional Integrating Sphere for VCSEL measurements

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Automated Measurement of VCSEL Power at 10KHz Using Centauri and LabVIEW

Ophir's new IS1.5-VIS-FPD800 offers several advantages for measuring VCSEL's in a single instrument: 阅读更多...

Integrating Sphere Fundamentals and Applications

Introduction 阅读更多...

Ophir Power/Energy Meter Calibration Procedure and Traceability/Error Analysis

This document discusses the interpretation and basis for stated measurement accuracy of Ophir Laser Power/Energy meters.
1. General Discussion
2. Combination of Errors and Total Error
3. Analysis of Power and Energy Calibration Errors
4. Detailed Analysis of Power and Energy Calibration Errors


VCSEL Measurement Solutions

Vertical Cavity Surface Emitting Lasers (VCSELs) are a type of semiconductor laser diode. Unlike edge emitting laser diodes, VCSELs emit upwards and thus can be easily packaged as emitter arrays containing hundreds of emitters on a single chip. 阅读更多...