New! 818-ST2 series wand photodiode sensor, redesigned with a sturdy metal housing, are now available! The 818-ST Series will be phased out.
The detector specifications of the new aluminum cased 818-ST2 Series are identical to those of the 818-ST Series. Incorporating a large 10 mm X 10 mm Si photodiode, these slim detectors are ideal for measurements in tight locations with busy setups. It provides a built-in calibrated OD3 attenuator at the flick of a switch. The UV detector is packaged in clear anodized aluminum housing to avoid burning (resulting in potential damages on optics in the setup), especially in the UV wavelength range. The calibration module is detachable from the BNC connector, allowing interfacing with Newport meters, an oscilloscope, or a current meter as well.
All detectors are supplied with a NIST traceable calibration report that details individual detector responsivity measured with and without attenuator. The model indicated by the /DB suffix come with an additional BNC/DB15 calibration module that provides direct compatibility with Newport power meters, including 1830-R-GPIB , 1916-R , 1917-R , 1918-R , 1928-C , and 1936-R / 2936-R . The /CM suffixed models come with an additional BNC/8-pin mini-DIN calibration module that provides compatibility with legacy Newport power meters. In both cases, the /CM and /DB adapters contain also the detector calibration data, model number, serial number and calibration date for seamless operation with the power meter. For more details about detector compatibility try our Low Power Sensor Selection Guide.
The 1830-R is an ideal meter for use with the
818-ST2(-UV)/DB and 818-ST(-UV)/DB series detectors.
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. For more information, refer to 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
Detachable Calibration Modules for Calibrated Power Readings
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 /CM or /DB suffix in the detector Model number.
New 818-ST2 Series in Rugged Aluminum Housing
High power laser beam, especially in the short UV wavelength range, is highly absorbed by plastic material, in which most other wand detectors are packaged. This can potentially result in evaporation of the material and with the UV wavelength optical coating can easily be damaged. Newport’s 818-ST2 Series is designed in aluminum housing to address this issue, and to make it workable in more challenging environments.
Specifications
Model
(w/ DB15 Connector) |
818-ST2-UV
(/DB) |
818-ST2
(/DB) |
| Spectral Range (nm) |
200 to 1100 |
400 to 1100 |
| Power Density, Average Max w/ Attenuator (W/cm2) |
0.2 |
2 |
| Power Density, Average Maximum w/o Attenuator (mW/cm2) |
0.5 |
5 |
| Pulse Energy, Maximum - w/ Attenuator (µJ/cm2) |
0.1 |
1 |
| Pulse Energy, Maximum - w/o Attenuator (nJ/cm2) |
0.1 |
1 |
| Uniformity (%)(1) |
±2 |
| Linearity (%) |
±0.5 |
| Calibration Uncertainty w/o Attenuator |
4% @ 200-219nm
2% @ 220-349nm
1% @ 350-949nm
4% @ 950-1100 |
1% @ 400-940nm
4% @ 941-1100 |
| Calibration Uncertainty, w/ Attenuator |
8% @ 200-219nm
2% @ 220-349nm
1% @ 350-949nm
4% @ 950-1100nm |
1% @ 400-940nm
4% @ 941-1100nm |
| Rise Time (µs) |
≤3 |
| Shunt Resistance (MΩ) (typ) |
≥200 |
| Reverse Bias, Maximum (V) |
5 |
| NEP (pW/√Hz) |
0.018 |
0.015 |
| Material |
UV Enhanced Silicon
(UV Enhanced) |
Silicon |
| Active Area (cm2) |
1 |
| Shape |
Wand |
| Attenuator, OD3 |
Built-In |
1) When measured with beam centered and filling 80% of active area. Uniformity specification applies to photodiode only. It does not apply to the attenuator.
Typical spectral responsivity of Newport's low power detectors
