Typical spectral responsivity of Newport\'s low power detectorsNIST traceable calibration with better uncertainty than competition
Improved 10 mm clear aperture attenuator design
Detachable calibration module
Wavelengths from 200–1800 nm
Removable calibrated OD3 attenuator
NIST traceable 818 Series Photodiode Sensors allow an accurate power measurement over a broad power range with a removable attenuator.
The 818 Series include a full spectral response calibration utilizing NIST-traceable standardscalibrated 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 with and without the attenuator are shipped with each product. To maintain accuracy and guarantee performance Newport recommends annual photodiode detector calibration.
Typical spectral responsivity of Newport\'s low power detectors
The 884-xx Series OD3 attenuators, calibrated for each matching detector and shipped together, extend the calibrated optical dynamic range of our detectors by three decades. Our attenuator design provides high damage threshold and spectral flatness. With the low NEP associated with the photodiodes we are using, a wider dynamic range is achieved. For less than 1 mW input power, we recommend removing the attenuator (0.1 mW for 818-UV/DB between 200 - 400 nm) to maximize the signal to noise ratio.
Plots of various photodiode characteristics
Newport uses the highest quality semiconductor detector materials available. Available sensor types are silicon (Si), UV-enhanced Si, Germanium, and Indium Gallium Arsenide (InGaAs). Choose 818-UV for 200 - 400 nm wavelength, but note that the maximum measurable power level in 400 - 1100 nm is as low as 50 mW with the attenuator on. Newport’s advanced calibration facility performs the tightest calibrations in the business, further improving the absolute accuracy of our detectors.
1936-R and 2936-R
Benchtop Low Power Optical Meter
Optical Power Meter, High-Performance Hand-Held
Economical Handheld Laser Power Meter
Single Channel USB Optical Power Meter
Please refer to Newport Power Meter and Detector Legacy and Compatibility for a complete list of meters that are compatible with this model.
Please refer to Newport Power Meter and Detector Legacy and Compatibility for a complete list of meters that are compatible with this model.
The models with the /DB suffix come with a detachable BNC/DB15 calibration module that provides direct compatibility with Newport’s current power meter offering. The models with the /CM suffix come with a detachable BNC/8-pin mini-DIN calibration module that provides compatibility with legacy Newport power meters. The standard BNC connector allows flexible interfacing with oscilloscopes, lock-in amplifiers or current meters. In both cases, the /CM and /DB adapters contain the detector calibration data, model number, serial number and calibration date for seamless operation with the power meter.
| Connector Type | Detector Model | Compatible Power Meter |
|---|---|---|
 DB15 Cal Module |
818-UV/DB 818-SL/DB 818-IR/DB 818-IG/DB | 843-R , 1918-R , 1830-R , 1936-R , 2936-R , 841-P-USB |
 8-Pin Din Cal Module |
available offline only 818-UV/CM, 818-SL/CM, 818-IR/CM, 818-IG/CM |
Legacy meters with 8-Pin Din Interface 840-C, 1830-C, 1835-C/2835-C, 2832-C |
 No Cal Module (BNC) |
Available offline only 818-UV, 818-SL, 818-IR, 818-IG |
Oscilloscope (requires a load resistor) Current meter |