Newport’s new 818-xx-L and 818-xx-L/DB series Low Cost Low-Power Optical Detectors use the same highest quality photo-detectors as in the popular 818 series photo-detectors, with an attractive price for budget-conscious users. Available photodiodes are: silicon (Si), UV-enhanced Si, Germanium, and Indium Gallium Arsenide (InGaAs). Every single detector is shipped with a complete full-spectrum calibration report detailing detector responsivity, without attenuator, in 10 nm increments.
The model indicated by the /DB suffix come with an additional BNC/DB15 calibration module that provides direct compatibility with Newport’s latest power meters, including 1830-R , 1916-R , 1917-R , 842-PE , 1918-R , 1928-C , and 1936-C / 2936-C (see Related Products tab for more information). The calibration module is detachable, allowing flexible interfacing with Newport optical meters, oscilloscopes, lock-in amplifiers, or current meters. For power meter and detector compatibility information try our Calibrated Optical Detector Selection Guide.
818-xx-L and 818-XX-L/DB photodetectors are supplied with a NIST traceable calibration report that details individual detector responsivity without attenuator.
The all new optional 884 Series OD3 attenuators can be purchased separately to extend the optical dynamic range of the photodiode sensor heads by three decades. The 10 mm clear aperture with the cross hair will improve the detector alignment to the input optical beam and helps to avoid detector overfilling.
Also available are a variety of Photodiode Detector Accessories such as collimating lens assemblies, fiber optic adapters, a bare fiber adapter, and a 1” optic holder.
See the Related Products tab for the latest compatible power meter models.
The 1830-R is an ideal meter for use with the 818-xx-L series detectors.
818-SL-L detector, which does not have the DB15 memory module
Optional OD3 Attenuator Adapters
884-IG OD3 Attenuator
The 884 Series OD3 attenuators can extend the dynamic range of a detector approximately by a factor of 1000. Due to the wavelength dependence of the attenuator, the detector is no longer calibrated when the attenuator is mounted. If it is desired that the entire dynamic range both with and without the attenuator be calibrated, please see Low-Power Calibrated Photodetectors.
Low NEP (Noise Equivalent Power) with a Wide Dynamic Range
Exclusive OD3 attenuator technology extends the calibrated optical dynamic range of our Cylindrical and Hand-Held Wand Detectors by three decades. Our patented attenuator design provides low reflection, high damage threshold and spectral flatness, without the damage susceptibility problems of thin-film attenuators or the spectral variance of simple volume-absorbing attenuators. With the low NEP associated with the photodiodes Newport is using, a wider dynamic range is achieved.
Highest Quality Photodiodes Are Used in Newport Semiconductor Detectors
Newport uses the highest quality semiconductor detector materials available in our 818 Series Low-Power Detectors. In addition, each detector arrives with a complete full-spectrum calibration report detailing detector responsivity in 10 nm increments. Newport’s advanced in-house calibration facility performs the tightest calibrations in the business, further improving the absolute accuracy of our detectors.
Calibration modules are required when using the 818 Series Low Power Detectors with Newport’s power meters in calibrated power reading. The module is matched to an individual detector and provides the meter with detector calibration and operating information. The calibration module option is indicated by the /DB suffix in the detector model number.
Plots of various photodiode characteristics
Typical spectral responsivity of Newport's low power detectors
|
Model |
818-UV-L
|
818-SL-L
|
818-IR-L
|
818-IG-L
|
| Spectral Range (nm) |
200 to 1100 |
400 to 1100 |
780 to 1800 |
800 to 1650 |
| Power, Average Maximum (mW/cm2)(1) |
0.2 |
5 |
3 |
3 |
| Pulse Energy, Maximum - w/o Attenuator (nJ/cm2)(2) |
0.1 |
1 |
0.35 |
0.35 |
| Calibration Uncertainty (3) |
4% @ 200-219nm, 2% @ 220-349nm, 1% @ 350-949nm, 4% @ 950-1100nm |
1% @ 400-940nm, 4% @ 941-1100nm |
2% @ 780-910nm, 2% @ 911-1700nm, 4% @ 1701-1800nm |
2% @ 800-900nm, 2% @ 901-1650nm |
| Uniformity (%) |
±2 |
| Linearity (%) |
±0.5 |
| Rise Time (µs) |
≤5.9 |
≤2 |
≤2 |
≤2 |
| Shunt Resistance (MΩ) (typ) |
≥10 |
≥10 |
≥35 (kΩ) |
≥20 |
| Reverse Bias, Maximum (V) |
5 |
3 |
0.25 |
2 |
| NEP (pW/√Hz) |
0.45 |
0.2 |
0.6 |
0.04 |
| Material |
UV Enhanced Silicon |
Silicon |
Germanium |
Indium Gallium Arsenide |
| Active Area (cm2) |
1 |
0.071 |
| Active Diameter (cm) |
1.13 |
0.3 |
| Shape |
Cylinder |
Cylinder |
Cylinder |
Cylinder |
1) Without attenuator and applies to entire spectral response
2) 15 ns pulse width
3) Calibration uncertainty can be varied depending on the NIST transfer standard uncertainty variation.
