The newly introduced 818P-001-12 is a 3 W, 12 mm diameter thermopile optical sensor offering the flat spectral response and the low spatial dependence of thermopiles, while retaining the high sensitivity only available with photodiodes. 818P-001-12NIR is calibrated with a fused silica window mounted on the tube so that long wavelength (>1.36 um) thermal noise can be cut out of the measurement.
Users working with lasers in the µW and mW range will appreciate its lower thermal drift compared to the standard thermopile detectors. The sensors come with a tube screwed on the detector head which helps reduce power fluctuations from air turbulence. It is ideally suited for measuring both CW and pulsed laser diodes, OPA, Gas Lasers (HeNe, argon, etc) or any low power laser, as well as broadband sources under 3 Watt. The 818P-001-12 and 818P-001-12NIR includes a DB15 connector and internal EEPROM for storing factory calibration data and are compatible with all Newport's power meters currently offered. When using with Newport's legacy 1835-C and 2835-C series optical meters the 818P-DIN adapter cable is required (ordered separately). Annual calibration of the thermopile sensor is recommended to assure NIST traceability. The sensor heads have a 8-32 tapped hole for easy mounting. For high power thermopile detectors we offer Calibrated Thermopile Detectors and Thermopile Detector, 3 kW.
For Gaussian beams multiply power and energy density by a factor of 2 when comparing to online damage threshold specifications. For beams with hot spots multiply power and energy density by a factor of 3 when comparing to online damage threshold specifications.
Click here for a Newport/Spectra Physics Lasers Optical Detector Selection Guide for detectors compatible with Spectra Physics lasers.
Additional Pictures
The 818P-001-12 offers flat spectral response, high sensitivity and extremely low thermal drift.
Compatible Power Meter Models
|
Model |
818P-001-12
(1) |
818P-001-12NIR
|
| Spectral Range (µm) |
0.190 to 10.6 |
280 to 1360 |
| Max. Measurable Power (W) |
3 |
| Power Noise Level (µW)(3) |
0.5 |
| Noise Equivalent Energy (µJ) |
12 |
| Rise Time (s)(5) |
2.5 |
| Responsivity, Approximate (mV/W) |
200 |
180 |
| Calibration Uncertainty (%) |
±2.5 % at 1064 |
| Repeatability (%) |
±0.5 |
| Resolution (%) |
±0.5 |
| Beam Size Dependence (%) |
±0.7 |
| Maximum Average Power (W) |
(continuous) |
3 |
| (2 minutes) |
3 |
| Power Density, Maximum Average (kW/cm2) @ 1064nm, CW |
1 |
| Pulse Energy Density, Maximum (J/cm2)(4) |
1.0 |
| Active Diameter (mm) |
12 |
| Active Area (cm2) |
1.13 |
| Cooling Method |
Heat Sink |
| Dimensions (L x W x D) [in. (mm)] |
2.87 x 2.87 x 0.79 (73 x 73 x 20)(2) |
2.87 x 2.87 x 1.10 (73 x 73 x 28) (2) |
| Weight [lb (kg)] |
0.67 (0.31) |
0.7 (0.32) |
| Operating Temperature |
15 to 28ºC, RH < 80% |
15 to 28ºC, RH < 80% |
1) Thermal drift: 12 µW/Cº; Thermal drift (30 min): 1 µW
2) Tube adds 2 inches (50mm) to detector depth (see photo)
3) See
Tech Note 4: Power Meter Minimum Measurable Power 4) See manual in literature tab for additional specifications.
5) Typical rise time with anticipation setting turned on.
