Newport Corporation | Low-Power Photodetector, 818 Series

Low-Power Photodetector, 818 Series

Compatible Power Meter Models for /DB Models

Calibrated power levels from pW to 2W, with highest quality photodetectors
Wavelengths from 200–1800 nm
Matching patented, removable OD3 attenuator for each detector
NIST traceable calibration
EMI/RFI shielded

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DescriptionSpecifications Models

818-xx/CM (note the calibration module at the end of the cable)

Detachable Calibration Modules for Calibrated Power Readings

818-SL and 818-IR

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 /DB suffix in the detector Model number. Newport’s advanced in-house calibration facility performs the tightest calibrations in the business, assuring the absolute accuracy of our photodiode sensors. For more information, see Optical Detector Calibration Services.

Highest Quality Photodiodes Are Used in Newport Semiconductor Detectors (same as 818-ST page)

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 (see 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 (µm)	0.2-1.1	0.4-1.1	0.78-1.8	0.8-1.65
Power, Average Max w/ Attenuator (W/cm²)⁽¹⁾	0.2	2	2	2
Power, Average Maximum w/o Attenuator (mW/cm²)⁽¹⁾	0.2	2	3	3
Pulse Energy, Maximum - w/ Attenuator (µJ/cm²)⁽²⁾	0.10	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% @ 400-920nm, 4% @ 921-1100nm	2% @ 780-1700nm, 4% @ 1701-1800nm	2% @ 800-1650nm
Calibration Uncertainty (With Attenuator)⁽⁴⁾	8% @ 200-350nm, 2% @ 351-390nm, 1% @ 391-920nm, 4% @ 921-1100nm	1% @ 400-920nm, 4% @ 921-1100nm	5% @ 780-910nm, 2% @ 911-1700nm, 4% @ 1701-1800nm	5% @ 800-900nm, 2% @ 901-1650nm
Uniformity (%)⁽³⁾	±2	±2	±2	±2
Linearity (%)	±0.5	±0.5	±0.5	±0.5
Saturation Current Density (mA/cm²)	0.05	4.6	400	250
Responsivity	≥0.09 A/W 250–1000 nm	>0.1 A/W 400–1000 nm	≥0.2 A/W 850–1700 nm	≥0.1 A/W 800–1600 nm
Responsivity (Peak)	>0.4 A/W @ 250–1000 nm	>0.5 A/W @ 400–1000 nm	>0.8 A/W @ 850–1700 nm	>0.9 A/W @ 800–1600 nm
Rise Time (µs)	≤2	≤2	≤2	≤2
Shunt Resistance (MΩ) (typ)	≥2	≥2	≥35	≥20
Die Capacitance (pF)	8,800	12,000	14 nF	1500
Reverse Bias, Maximum (V)	100	10	0.25	2
NEP (pW/√Hz)	0.89	0.55	0.7	0.03
Material	Silicon	Silicon	Germanium	Indium Gallium Arsenide
Active Area (cm²)	1	1	0.071	0.071
Active Diameter (cm)	1.13	1.13	0.3	0.3
Shape	Cylinder	Cylinder	Cylinder	Cylinder
Attenuator, OD3	Detachable	Detachable	Detachable	Detachable

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.

	Model	Description
	818-IG	818 Photodetector, InGaAs, 800–1650 nm, BNC Connector
	818-IG/CM	818 Photodetector, InGaAs, 800–1650 nm, 8-Pin DIN Cal Module
	818-IG/DB	818 Photodetector, InGaAs, 800–1650 nm, DB15 Calibration Module
	818-IR	818 Photodetector, Germainium, 800–1800 nm, BNC Connector
	818-IR/CM	818 Photodetector, Germainium, 800–1800 nm, 8-Pin DIN Cal Module
	818-IR/DB	818 Photodetector, Germainium, 800–1800 nm, DB15 Calibration Module
	818-SL	818 Photodetector, Silicon, 400–1100 nm, BNC Connector
	818-SL/CM	818 Photodetector, Silicon, 400–1100 nm, 8-Pin DIN Cal Module
	818-SL/DB	818 Photodetector, Silicon, 400–1100 nm, DB15 Calibration Module
	818-UV	818 Photodetector, UV Enhanced Silicon, 200–1100 nm, BNC Connector
	818-UV/CM	818 Photodetector, UV Enhanced Silicon, 200–1100 nm, 8-Pin DIN Cal Module
	818-UV/DB	818 Photodetector, UV Enhanced Silicon, 200–1100nm, DB15 Calibration Module

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