The 818-SL/DB Silicon (Si) Photodetector is supplied with a NIST traced calibration report that details individual detector responsivity measured with and without attenuator. Exclusive OD3 attenuator technology extends the calibrated optical dynamic range of our photodiode sensor heads by three decades. The serial numbers for the detector and the attenuator are matched to ensure NIST traceability. 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. This model includes a BNC/DB15 calibration module. The adapter contains the detector calibration data, model number, serial number and calibration date for seamless operation. Also available are a variety of accessories such as collimating lens assemblies, fiber optic adapters, and a bare fiber adapter, and a 1 inch optic holder. Note that Model 818-SL/CM is available offline only. Model 818-SL is no longer available.

Detector Type	Standard
Material	Silicon
Sensor Size	Ø11.3 mm
Spectral Range	400 - 1100 nm
Maximum Measurable Power	2.0 W
Maximum Measurable Power Without Attenuator	4 mW with 1830-R and 1936-R, 2.5 mW with 843-R, 1919-R, and 841-PE-USB
Maximum Power Density	30 W/cm2
Maximum Power Density without Attenuator	3 W/cm2
Maximum Pulse Energy with Attenuator	5 µ
Maximum Pulse Energy Without Attenuator	5 n
Calibration Uncertainty without Attenuator	±1% @ 400-940nm, ±4% @ 941-1100 nm
Calibration Uncertainty With Attenuator	±1% @ 400-940nm, ±4% @ 941-1100nm
Linearity	±0.5 %
Uniformity	±2 %
Rise Time	≤2 µs
Attenuator	OD3, Detachable
Connector Type	DB15
RoHS	Compliant
Minimum Detectable Power	20 pW (1936-R/2936-R), 100 pW (1830-R, 843-R, 1919-R, 841-PE-USB), 5 nW (1918-R)
Clear Aperture	10.3 mm