Compare Model Drawings, CAD & Specs Availability Price
818-UV/DB
Optical Power Detector, UV Silicon, 200-1100nm, DB15 Calibration Module
$726
In Stock
 818-UV/DB Optical Power Detector, UV Silicon, 200-1100nm, DB15 Calibration Module
In Stock
 $726
818-SL/DB
Optical Power Detector, Silicon, 400-1100 nm, DB15 Calibration Module
$642
2 Weeks
 818-SL/DB Optical Power Detector, Silicon, 400-1100 nm, DB15 Calibration Module
2 Weeks
 $642
818-IR/DB
Optical Power Detector, Germanium, 780-1800 nm, DB15 Calibration Module
$785
In Stock
 818-IR/DB Optical Power Detector, Germanium, 780-1800 nm, DB15 Calibration Module
In Stock
 $785
818-IG/DB
Optical Power Detector, InGaAs, 800-1650 nm, DB15 Calibration Module
$1,265
In Stock
 818-IG/DB Optical Power Detector, InGaAs, 800-1650 nm, DB15 Calibration Module
In Stock
 $1,265

Specifications

Features

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.

Removable Calibration Module

The 818 series detectors include a BNC connector with a removable calibration module. The /DB suffix indicates a DB15-style calibration module that is directly compatible with Newport’s current power meters. Models with the /CM suffix, which include a legacy round 8-pin mini-DIN module and the BNC connector models, 818-xx, are no longer available. For older instruments that require no calibration module (BNC), we recommend that customers purchase 818-xx/DB and simply remove the DB15 calibration module. Please order the 818-SCAL-OPT when only a new calibration module is needed for the 818 Series photodiode detectors, without the need to recalibrate the detector.

Additional Functionality with BNC Connector

The BNC connector extends the functionality of the 818 Series photodiode sensors. It enables direct connection to an ammeter or lock-in amplifier. It also allows the detector output to be viewed on an oscilloscope after first connecting it to a current-to-voltage preamplifier, such as Newport's model 70710. Furthermore, the cable length can be extended by connecting another BNC cable.

Adapters for Fiber-Optic Applications

These photodiode sensors can be converted to measure optical power from connectorized or bare optical fibers. Newport offers a comprehensive set of screw-in fiber-optic adapters to match a variety of connector types. Our bare fiber holder and adapter mount are designed together to hold 250-µm bare fibers without damaging the fiber.

Compatible Power Meters

Newport offers a comprehensive range of optical power meters from low cost, hand-held meters to the most advanced dual-channel benchtop meter available in the market. Presented here is a list of meters compatible with the 918D Series sensors. For more detailed information about our power meters, please see our Optical Power Meter Guide.

2938-R_front_angle
1938-R/2938-R		 2936-R-grey_sensor
1936-R/2936-R		 1830_Front_10_586
1830-R/1830-R-GPIB		 1919-R_angle
1919-R		 843-R_side
843-R/843-R-USB		 844-PE-USB
845-PE-RS		 844-PE-USB
844-PE-USB
User Interface Touchscreen Advanced Simple Advanced Simple User Commands, PM Manager PMManager only
Measurement Modes Power,
Low Freq. Power,
Peak-to-Peak Power,
RMS Power,
Exposure,
Current

Power,
Peak-to-Peak Power,
RMS Power,
Current		 Power Power,
Low Freq. Power
Exposure		 Power Power,
Low Freq. Power		 Power,
Low Freq. Power
Analog Bandwidth Up to 200 kHz Up to 400 kHz Up to 20 kHz 15 Hz 15 Hz 15 Hz 15 Hz
Data Storage 2 GB internal,
External USB memory size,
Via PMManager		 250,000 pts internal Limited by USB memory size 843-R-USB: Via PMManager
843-R: None		 User Commands, PM Manager Via PMManager
Measurement Rate per Second 10,000 10,000 20 15 15 15 15
Trigger In/Out ✔ ✔
Analog Out ✔ ✔ ✔ ✔ ✔ ✔ ✔
Computer Interface USB
RS232		 USB
RS232		 1830-R: USB
1830-R-GPIB: GPIB and RS232		 USB
RS232		 843-R-USB: USB
843-R: None		 RS232 USB

Please refer to Newport Power Meter and Detector Legacy and Compatibility for a complete list of meters that are compatible with this model.

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