819D integrating sphere configuration is ideal for divergent beam source such as an output beam from a laser diode.
819C integrating sphere configuration is ideal for a collimated beam source such as a collimated laser beam.
Calibrated and traceable to NIST standards
Tightest calibration uncertainty specification in market
Maximum power measurement up to 10 watts and higher
Wavelengths covered 200 - 1650 nm
Faster response than thermopile detectors
Integrating sphere detectors with NIST traceable calibration are ideal for high power measurements requiring fast response.
One of the major advantages of using an integrating sphere is to diffuse the input beam so that the detector readings are insensitive to errors caused by detector positioning or problems associated with overfilling, or saturation of the active area of the detector. The detector should see a completely diffused input field. Then, a key technical consideration, when deciding which configuration one has to choose, is whether the input beam will directly hit the detector, influencing the optical power at the detector. For this purpose, each integrating sphere includes a baffle.
Depending on the beam divergence characteristics of the light source, Newport offers two different flavors of sphere detectors. Use the 819D series detectors for a diverging light source, and use the 819C series for a collimated input beam. In the 819D series, the baffle is placed between the input port and the detector so that the undiffused beam does not hit the detector directly. When the collimated beam is measured, the baffle needs to be placed between the first reflection off of the internal wall of the sphere and the detector.
| 819D integrating sphere configuration is ideal for divergent beam source such as an output beam from a laser diode. | 819C integrating sphere configuration is ideal for a collimated beam source such as a collimated laser beam. |
Calibrated integrating sphere detectors are available with a low noise Si, UV-enhanced Si or an InGaAs photodiode. The available sphere sizes are 2”, 3.3” or 5.3” diameters. To maintain accuracy and guarantee performance Newport recommends annual integrating sphere detector calibration. Every product includes a full spectral response calibration utilizing NIST-traceable standards calibrated with high-precision equipment maintained in Newport’s optical detector calibration facility. Tight calibration facility and process control allows the tightest calibration uncertainty in industry. Each detector is shipped with the calibration data, which is electronically stored inside the detector\'s EEPROM. A certificate of calibration as well as the actual calibration curves and data are shipped with each product. To maintain accuracy and guarantee performance Newport recommends annual photodiode detector calibration.
The spheres with a silicon photodiode are suitable for measurements ranging from 400 – 1100 nm, while the models with an InGaAs detector are suitable for approximately 800 – 1650 nm range. The UV version is optimized for wavelengths between approximately 200 - 400 nm, even though it is calibrated up to 1100 nm.
The models that end with \'-CAL2\' suffix feature a detector with a built-in thermocouple and OD1 attenuator. When connected to power meter models 1830-R, 1918-R, 1936-R, or 2936-R, they will automatically recognize the attenuator On/Off position and the detector head temperature.
All the spheres come with an SMA fiber adapter on the North pole as a standard feature, allowing a small amount of light pickoff for wavelength measurement or any further analysis without affecting the overall system calibration. All sphere detectors are calibrated with the adapter already installed.
Note that the system calibration is no longer valid if any component is changed from the original calibrated configuration. For a very high power level, elevated temperature of the integrating sphere system can affect the measurement accuracy, so the sphere must be properly cooled. Check with Newport for the complete list of integrating sphere detectors. For individual integrating spheres and accessories see Integrating Spheres and Accessories.
Please refer to Newport Power Meter and Detector Legacy and Compatibility for a complete list of meters that are compatible with this model.