New! A new attenuator design for the 818 series detectors is implemented! The 10 mm clear aperture with the cross hair will improve the detector alignment to the input optical beam more accurately and help avoid detector overfilling.
Newport uses the highest quality photodiodes available in our 818 Series Low-Power Photodetector family. Available sensor types are silicon (Si), UV-enhanced Si, Germanium, and Indium Gallium Arsenide (InGaAs). 818 photodetectors are supplied with a NIST traceable calibration report that details individual detector responsivity measured with and without attenuator. The standard BNC connector allows flexible interfacing with oscilloscopes, lock-in amplifiers or current meters. The models indicated by the /DB suffix come with a detachable 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 , 841-P-USB and 1936-C / 2936-C . The models indicated by the /CM suffix come with a detachable BNC/8-pin mini-DIN calibration module that provides compatibility with legacy Newport power meters such as the 1835/2835-C. 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.
See the Related Products tab for the latest compatible power meter models.
Adapters for Fiber Optics and Lenses
For a variety of accessories to enhance the detector functionality, see Photodiode Detector Accessories.
Compatible Power Meter Models for /CM Models
- 1835-C/2835-C
- 1830-C
- 840-C
- 2832-C
Highest Quality Photodiodes Are Used
Newport uses the highest quality semiconductor detector materials available in our 818 Series Low-Power Detectors. The serial numbers for the detector and the attenuator are matched to ensure NIST traceability. 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. For more information, refer to Optical Detector Calibration Services.
Plots of various photodiode characteristics
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.
Typical spectral responsivity of Newport''s low power detectors
|
Model |
818-UV
|
818-SL
|
818-IR
|
818-IG
|
| Spectral Range (nm) |
200 to 1100 |
400 to 1100 |
780 to 1800 |
800 to 1650 |
| Power Density, Average Max w/ Attenuator (W/cm2)(1) |
0.2 |
2 |
2 |
2 |
| Power Density, Average Maximum w/o Attenuator (mW/cm2)(1) |
0.2 |
5 |
3 |
3 |
| Pulse Energy, Maximum - w/ Attenuator (µJ/cm2)(2) |
0.1 |
1 |
0.35 |
0.35 |
| Pulse Energy, Maximum - w/o Attenuator (nJ/cm2)(2) |
0.1 |
1 |
0.35 |
0.35 |
| Calibration Uncertainty (Without Attenuator)(4) |
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 |
| Calibration Uncertainty (With Attenuator)(4) |
8% @ 200-219nm, 2% @ 220-349nm, 1% @ 350-949nm, 4% @ 950-1100nm |
1% @ 400-940nm, 4% @ 941-1100nm |
5% @ 780-910nm, 2% @ 911-1700nm, 4% @ 1701-1800nm |
5% @ 800-900nm, 2% @ 901-1650nm |
| Uniformity (%)(3) |
±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 |
| Attenuator, OD3 |
Detachable |
| Operating Temperature |
5°C to 50°C, <70% RH |
1) Applies to entire spectral response
2) 15 ns pulse width
3) Uniformity specification applies to detector only
4) Calibration uncertainty can be varied depending on the NIST transfer standard uncertainty variation.
