818 calibrated photodiode sensor

The NIST traceable 818 series photodiode sensor can perform precise power measurements over a wide power range using a detachable attenuator.

NIST traceable calibration has better uncertainty than similar products

The design of a 10mm aperture attenuator has been improved

Detachable calibration module

The wavelength range is 200-1800 nm

Mobile calibration OD3 attenuator

contrast	model
	818-IG/DBInGaAs detector, 800-1650 nm, DB15 calibration module
	818-IR/DBGermanium detector, 780-1800 nm, DB15 calibration module
	818-SL/DBSilicon detector, 400-1100 nm, DB15 calibration module
	818-UV/DBUV detector, 200-1100 nm, DB15 calibration module

Product specifications

model	818-UV/DB	818-SL/DB	818-IR/DB	818-IG/DB
Photosensitive size	Ø11.3 mm	Ø11.3 mm	Ø3 mm	Ø3 mm
material	UV Enhanced Silicon	Silicon	Germanium	Indium Gallium Arsenide
spectral range	200 - 1100 nm	400 - 1100 nm	780 - 1800 nm	800 - 1650 nm
Max can measure power	0.2 W (200 - 400 nm); 50 mW (400 - 1100 nm)	2.0 W	2.0 W (1830-R, 1918-R, 1936-R/2936-R), 1.3 W (843-R, 1919-R, 841-PE-USB)	2.0 W (1830-R, 1918-R, 1936-R/2936-R), 1.3 W (843-R, 1919-R, 841-PE-USB)
Max measurable power (without attenuator)	0.3 mW (200 - 400 nm); zero point onemW (400 - 600 nm, >1050 nm) , 0.07 mW (600 - 1050 nm)	4 mW with 1830-R and1936-R, 2.5 mW with 843-R, 1919-R, and 841-PE-USB	10 mW (1918-R,1936-R/2936-R), 1.3 mW (843-R, 1919-R, 841-PE-USB)	10 mW (1830-R, 1918-R,1936-R/2936-R), 1.3 mW (843-R, 1919-R, 841-PE-USB)
Min can detect power	20 pW (1936-R/2936-R), 100 pW (1830-R, 843-R, 1919-R, 841-PE-USB), 5 nW (1918-R)	20 pW (1936-R/2936-R), 100 pW (1830-R, 843-R, 1919-R, 841-PE-USB), 5 nW (1918-R)	5 nW	20 pW (1936-R/2936-R), 100 pW (1830-R, 843-R, 1919-R, 841-PE-USB), 5 nW (1918-R)
Max power density	30 W/cm2	30 W/cm2	30 W/cm2	30 W/cm2
Max power density (without attenuator)	0.2 W/cm2	3 W/cm2	3 W/cm2	3 W/cm2
Max pulse energy (with attenuator)	0.5 µJ	5 µJ	5 µJ	5 uJ
MAX pulse energy (without attenuator)	0.5 nJ	5 nJ	5 nJ	5 nJ
Calibration uncertainty (with attenuator)	±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% @ 1701-1800 nm	±5% @ 800-900nm, ±2% @901-1650nm
Calibration uncertainty (without attenuator)	±4% @ 200-219nm±2% @ 220-349nm±1% @ 350-949nm±4% @ 950-1100 nm	±1% @ 400-940nm, ±4% @ 941-1100 nm	±2% @ 780-910nm, ±2% @ 911-1700nm, ±4%@1701-1800 nm	±2% @ 800-900 nm, ±2% @ 901-1650 nm
attenuator	OD3, Detachable	OD3, Detachable	OD3, Detachable	OD3, Detachable
Linearity	±0.5 %	±0.5 %	±0.5 %	±0.5 %
uniformity	±2 %	±2 %	±2 %	±2 % @ 1550 nm
rise time	≤2 µs	≤2 µs	≤2 µs	≤2 µs
port type	DB15	DB15	DB15	DB15
Optical aperture	10.3 mm	10.3 mm	10.3 mm	10.3 mm

High quality photodiodes

Plots of various photodiode characteristics

Newport uses high-quality semiconductor detector materials available on the market. The available probe types include silicon (Si), ultraviolet enhanced silicon, germanium, and indium gallium arsenide (InGaAs). For wavelengths of 200-400 nm, choose 818-UV, but please note that when the attenuator is turned on, MAX at 400-1100 nm can measure power levels as low as 50 mW. Newport's advanced calibration factory performs strict calibration, further improving the absolute accuracy of our detector.

Wide dynamic range (with detachable attenuator)

Typical spectral responsivity of Newport's low power detectors

The 884-xx series OD3 attenuator (calibrated for each matched probe and shipped together) can extend the calibration optical dynamic range of our probes by thirty years. Our attenuator design provides high damage threshold and spectral flatness. By using low NEP associated with the photodiodes currently being used by our company, a wider dynamic range has been achieved. For input power less than 1 mW, our company recommends removing the attenuator (818-UV/DB is 0.1 mW between 200-400 nm) to improve the signal-to-noise ratio. The optical aperture of this attenuator is 10.3 mm.

Strict calibration uncertainty

The 818 series includes a full spectrum response calibration using NIST traceable standards and high-precision equipment maintained at the Newport optical probe calibration factory for calibration. Strict calibration equipment and process control can achieve strict calibration uncertainty in the industry. Each probe comes with calibration data, which is stored electronically in the detector's EEPROM. Each product comes with a calibration certificate and actual calibration curves and data with and without attenuators. To maintain accuracy and ensure performance, Newport recommends calibrating the photodiode probe annually.

Compatible with power meter models

1936-R and 2936-R desktop power meters

1830-R series desktop low-power optical meter

1919-R Advanced Handheld Optical Power Meter

843-R series economical handheld laser power meter

841-PE-USB Single Channel USB Optical Power Meter

see also
Newport power meter and probe old products and compatibilityTo obtain a complete list of power meters compatible with this model.

Precautions for detector connectors

The 818 series probe comes with a BNC connector with a detachable calibration module. /The DB suffix represents the DB15 style calibration module, which is directly compatible with Newport's current power meters. Models with the/CM suffix (available offline only at purchase) come with a traditional 8-pin mini DIN module. BNC connector model 818-xx is no longer available. When purchasing 818 xx/DB, simply remove the calibration module.

calibration module

For the 818 series photodiode probe, when you only need to order the calibration module, please order 818-SCAL-OPT without recalibrating the probe. When you place an order, please inform the salesperson of the probe model, the required calibration module type, and its serial number. This part cannot be ordered online.