Specifications

Features

Pyroelectric Sensor Physics

The configuration of a typical pyroelectric sensor and its operational output can be seen in the above Figure. A pyroelectric material, which is usually crystalline, possesses an electric polarization, even in the absence of an applied voltage. An incident laser pulse heats the crystal, which causes the material to expand and produce a change in the polarization. Charge builds up on opposite surfaces of the crystal which generates a current flow that charges a capacitor. This charged capacitor induces a voltage whose amplitude change is proportional to the original laser pulse energy. Since it is the change in temperature that produces the current, pyroelectric detectors respond only to pulsed or modulated radiation. They respond much more rapidly to variations in radiation than thermopiles and are unaffected by steady background radiation. Please see our Pyroelectric Sensor Physics technical note for additional information.

Photodiode Pulse Energy Detector

Model 919E-20U-10-20K is a photodiode energy detector for low energies with a 10mm aperture. This model is one of the most sensitive calibrated energy detector available in market. It can measure energies from 1nJ up to 15µJ. It's noise floor is approximately 50 pJ. It can operate at repetition rates up to 20 kHz and covers the spectral range from 0.19 - 1.1µm.

Measure Laser Repetition Rate Up to 25 kHz

The 919E series sensors can reliably measure energy pulses up to 25 kHz laser repetition rate. Select high pulse energy detectors can measure up to 10 kHz rep rate. When connected to our brand new 1919-R Handheld Power & Energy Meter, pulse energy of every pulse up to 6 kHz can be logged.

Sensor Sizes Up to 46 mm

When the diffuser is not in use, the active diameter of Model 919E-30-46-10K is as large as 46 mm. The active diameter is 33 mm even when the diffuser is mounted. In addition, two additional models feature 35 mm diameter.

NIST Traceable Calibration

All the detectors come with a DB15 connector and internal EEPROM for storing factory calibration data, making them directly compatible with Newport's 843-R, 843-R-USB, and the all new 1919-R Optical Power and Energy Meters.

High Sensitivity for Low Pulse Energy

In addition to Model 919E-20U-10-20K, three additional models are introduced for low pulse measurements up to 10 mJ pulses. Model 919E-200U-8-25K is the most sensitive pyroelectric sensor, capable of measuring as low as 1 uJ via a broad spectral range of 0.15 to 12 µm. Choose between 919E-0.1-12-25 and 919E-0.1-12-250, depending on the pulse rep rate of the laser source.

High Energy Level up to 30 J

We also offer five models that can handle high pulse energy. Model 919E-30-46-10K, especially, can handle up to 30 Joules by utilizing a calibrated diffuser with a high damage threshold.

Replacing Obsolete 818E Series Detectors

The 919E Series Pulse Energy Detectors replace the obsolete 818E Series detectors.  However, due to the technological differences between the two families, we do not offer a direct replacement cross reference chart.  Contact Newport with the specifications of your light source so that we can recommend you the right 919E series detector. 

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 919E 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 

1919-R_angle

1919-R 

843-R_side

843-R

841-PE-USB

844-PE-USB
Pyroelectric Measurement Pulse energy
Average power
Exposure		 Pulse energy
Average power
Exposure		 Pulse energy
Average power		 Pulse energy
Average power
Exposure
Sampling Rate (Pyroelectric) 25 kHz 5 kHz 500 Hz 10 kHz
Trigger In/Out ✔ No No No
Data Storage 2 GB internal,
External USB memory size,
Via PMManager		 Limited by USB memory size,
Via PMManager		 843-R-USB: Via PMManager
843-R: None		 Via PMManager
Computer Interface USB
RS-232		 USB
RS-232		 843-R-USB: USB
843-R: None		 USB

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

Resources

Literature

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Technical Notes

Selection Guides