Compare Model Drawings, CAD & Specs Availability Price
low cost photodiode-based fiber optic detector model 818-SL-L-FC-DB
Fiber Optic Detector, UV-Si, 200-1100 nm, 1.5 mW, DB15
$564
1 Week
1 Week
low cost photodiode-based fiber optic detector model 818-SL-L-FC-DB
Fiber Optic Detector, Si, 400-1100 nm, 4 mW, DB15
$455
1 Week
1 Week
low cost photodiode-based fiber optic detector model 818-SL-L-FC-DB
Fiber Optic Detector, Ge, 780-1800nm, 10 mW, DB15
$569
1 Week
1 Week
low cost photodiode-based fiber optic detector model 818-SL-L-FC-DB
Fiber Optic Detector, InGaAs, 800-1650 nm, 10 mW, DB15
$922
1 Week
1 Week

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.

Cost Effective Fiber-Optic Power Detection

These 818 Series fiber-optic photodiode optical power sensors are a low cost alternative to the 818-IS or 918D-IS Series sphere-based fiber-optic detectors. They are based on our standard 818 Series detectors with an included, removable 884-FC FC/PC fiber optic adapter. Replacing 884-FC with 884-FCA and 884-SMA, will accommodate for the FC/APC and SMA connectors respectively. Removing the fiber-optic adapter allows the detector to be used for uncalibrated free space power measurment.

Free space measurements

The photodiode sensor in the 818-xx-L-FC/DB is calibrated in free space. The 884-FC fiber adapter has no impact on calibration. Therefore, free space measurements can be done simply by removing the fiber adapter.

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.

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.

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
844-PE-USB
User Interface Touchscreen Advanced Advanced Simple Advanced Simple PMManager only
Measurement Modes Pwer,
Peak-to-Peak Power,
RMS Power,
Exposure,
Current
Power,
Peak-to-Peak Power,
RMS Power,
Current
Power Power,
Exposure
Power Power
Analog Bandwidth Up to 200 kHz Up to 400 kHz Up to 20 kHz  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
Via PMManager
Measurement Rate per Second 10,000 10,000 20 15 15 15 
Trigger In/Out
Computer Interface USB
RS-232
USB
RS-232
USB
RS-2321
GPIB1
USB
RS-232
843-R-USB: USB
843-R: None
USB

Only available with model 1830-R-GPIB

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