Optical Power Detector, UV Silicon, 200-1100nm, DB15 Calibration Module

818 Photodiode Sensors with Threaded OD3 Attenuator

The 818-UV/DB Low-Power UV Enhanced Silicon Photodetector is supplied with a NIST traced calibration report that details individual detector responsivity measured with and without attenuator. Exclusive removable OD3 attenuator (Model 884-UVR) 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 10.3 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.

Excellent Photodiode Linearity

These photodiodes show excellent linearity over a large dynamic range. This is ideal for use in applications that require high accuracy measurements down to the pW level, especially when combined with a high sensitivity power meter that can accommodate the large dynamic range of the optical signal.

Responsivity Variation over Temperature

A natural characteristic of a photodiode is for the its optical response to change as the temperature changes near the bandgap of semiconductor materials. Newport’s 918D series sensors feature a thermocouple near the photodiode, which allows certain Newport meters to read the temperature and automatically adjust the responsivity, ensuring the most accurate measurements.

Factors that Affect Maximum Measurable Power

The maximum measurable power of photodiode sensors is dependent on several factors such as the wavelength of incoming light, photodiode current output saturation, temperature, use of an attenuator and a power meter's maximum current input value. Newport provides maximum power specifications based on the power meter models, with and without an attenuator, and wavelength-dependent maximum power level. With these factors affecting measurable power in mind, choosing the proper detector for your application is critical.

NIST-traceable Sensor Calibration

Our calibrated photodiode sensors include a full spectral response calibration utilizing NIST-traceable standards calibrated with high-precision equipment maintained in Newport’s optical detector calibration facility. Tight calibration facility and process control allows the tightest calibration uncertainty in industry. Each detector is shipped with the calibration data, which is electronically stored inside the detector's EEPROM. A certificate of calibration as well as the actual calibration curves and data are shipped with each detector for attenuator and no attenuator models. To maintain accuracy and guarantee performance, Newport recommends annual photodiode detector calibration.

Detector calibration system block diagram.

Wide Dynamic Range with OD3 Attenuator

The 884 Series OD3 attenuators extend the calibrated optical dynamic range of our detectors by three decades. Both the attenuator and detector have their serial number scribed on the part which, to maintain calibration, must match. Our attenuator design provides high damage threshold and spectral flatness. With the low noise equivalent power (NEP) associated with the photodiodes being used, a wider dynamic range is achieved. The clear aperture of the 884 Series attenuators is 10.3 mm.

Removable OD3 Attenuator

For less than 1 mW input power (or 0.1 mW for 818-UV/DB between 200-400 nm), removing the OD3 attenuator by unscrewing it from the detector head is recommended to maximize the signal-to-noise ratio.

Specifications

Technical Specs

Detector Type
Post Mounted
Detector Input
Free Space
Detector Material
UV Enhanced Silicon
Spectral Range
200 - 1100 nm
Sensor Size
Ø10 mm
Attenuator
OD3, Threaded
Maximum Measurable Power
40mW
Minimum Measurable Power
20 pW
Maximum Measurable Power Without Attenuator
0.1 mW
Maximum Power Density
30 W/cm²
Maximum Power Density without Attenuator
0.2 W/cm²
Maximum Pulse Energy with Attenuator
400 µJ
Maximum Pulse Energy Without Attenuator
0.4 µJ

Maximum Pulse Energy
400 µJ
Calibration Module
Removable DB15 Connector
Calibration Uncertainty
3.4% (220-300 nm)
1.65% (300-430 nm)
1.1% (430-1000 nm)
4.3% (1035-1065 nm)
Linearity
±1 %
Uniformity
±2 % over Ø2 mm with attenuator, ±2 % over Ø4 mm without attenuator
Rise Time
3 µs
Clear Aperture
Ø10.3 mm
Connector Type
DB15
Cable Length
1.5 m
RoHS
Compliant

Detector Type
Post Mounted
Detector Input
Free Space
Detector Material
UV Enhanced Silicon
Spectral Range
200 - 1100 nm
Sensor Size
Ø10 mm
Attenuator
OD3, Threaded
Maximum Measurable Power
40mW
Minimum Measurable Power
20 pW
Maximum Measurable Power Without Attenuator
0.1 mW
Maximum Power Density
30 W/cm²
Maximum Power Density without Attenuator
0.2 W/cm²
Maximum Pulse Energy with Attenuator
400 µJ
Maximum Pulse Energy Without Attenuator
0.4 µJ

Maximum Pulse Energy
400 µJ
Calibration Module
Removable DB15 Connector
Calibration Uncertainty
3.4% (220-300 nm)
1.65% (300-430 nm)
1.1% (430-1000 nm)
4.3% (1035-1065 nm)
Linearity
±1 %
Uniformity
±2 % over Ø2 mm with attenuator, ±2 % over Ø4 mm without attenuator
Rise Time
3 µs
Clear Aperture
Ø10.3 mm
Connector Type
DB15
Cable Length
1.5 m
RoHS
Compliant

Resources & Downloads

2D Product Drawings

818-UV-DB Dimensional Drawing(258 kB, PDF)

Manuals

RevB 818 Series Manual(2.6 MB, PDF)

Technical Notes

Other

818-UV/DB Detector RoHS Certificate.pdf(254.2 kB, PDF)
818-SL & 818-UV RoHS Certificate(291.5 kB, PDF)
818 Series EU27 Declaration of Conformity(208 kB, PDF)

Literature

818 Series Photodiode Datasheet(834.1 kB, PDF)

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Notes:

Please note that recalibration is required after changing attenuators.

Accessories

Description	Compatibility	Avail.	Price
884-E2000FCOptical Fiber Adapter, Diamond E-2000, 818 & 918D Series Sensors	UNIVERSAL	In Stock	$307
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FP4-FCFiber Connector Adaptor, FC, 818-FA Fiber Adapter Mount	UNIVERSAL	In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More	$95
FP3-FH1Bare Fiber Holder, 818-FA2 Fiber Adapter Mount	UNIVERSAL	In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More	$381
884-UDAPTLens Tube Adapter, 818 & 918D Series Sensors	UNIVERSAL	In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More	$69
FP3-SMAFiber Connector Adaptor, SMA, 818-FA Fiber Adapter Mount	UNIVERSAL	In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More	$94
883-OHOptic Holder, 1 in. Diameter, 818 & 918D Series Sensors	UNIVERSAL	1 Week FREE 2-day shipping on thousands of products on Newport.com Learn More	$92
FP4-LCFiber Connector Adaptor, LC, 818-FA Fiber Adapter Mount	UNIVERSAL	1 Week	$185
818-FA2Bare Fiber Adapter Mount, 818 & 918D Series Sensors	UNIVERSAL	In Stock FREE 2-day shipping on thousands of products on Newport.com Learn More	$109
FP4-STFiber Connector Adaptor, ST, 818-FA Fiber Adapter Mount	UNIVERSAL	In Stock	$109
FP4-COL-1550Lensed Adapter Core, 1550 nm AR Coated, FP4 Series Adapters	UNIVERSAL	In Stock	$301

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