Tutorials

Technical Notes

Thermopile Sensor Physics

Thermopile sensors are based on thermocouples. A thermocouple consists of two dissimilar metals connected in series. To detect radiation, one metal junction is typically blackened to …

Technical Notes

Pyroelectric Sensor Physics

A pyroelectric crystalline material has electric polarization even in the absence of an applied voltage. On heating, the material expands and produces a change in the polarization which …

Technical Notes

Photodiode Sensor Physics

A photodiode sensor consists of a semiconductor p-n junction. Light falling on the junction causes the formation of electron-hole pairs. In photovoltaic mode, the electron-hole pairs …

Technical Notes

LED Characterization

Measurement techniques of the power, flux (equivalent to power but measured in units of lumens), and spectrum of LEDs is not very different from that of traditional light sources.

Technical Notes

Laser Beam Spatial Profiles

The irradiance distribution of a laser beam is determined by the transverse modes that exit the laser cavity. Typically, the lowest-order transverse mode (TEM00) is selected for emission …

Technical Notes

Incoherent Light Source Physics

The incoherent light sources discussed here share several characteristics that distinguish them from lasers. Incoherent light gives rise to radiation, which is emitted from the source …

Technical Notes

Radiometric Measurement

Radiometry is the measurement of energy or power in electromagnetic radiation fields or light. The average output power is the most common radiometric measurement since many light sources, …

Technical Notes

Photoreceiver Characteristics

The characteristics of such high-speed photoreceivers as well as their associated applications are the subjects of this technical note.

Technical Notes

Types of Photoreceivers

The main types of photoreceivers are those that can detect optical signals with fast temporal responses or those containing high frequency components.

Technical Notes

Laser Beam Profile Measurement

Given the different types of laser beam spatial distributions and their evolution as they propagate in free space and through optical elements, measurement of the beam profile is critical …

Technical Notes

Laser Pulse Characterization

Accurate temporal characterization of pulsed sources is as critical as accurately estimating the pulse energy and spatial and spectral profiles.

Technical Notes

Diffraction Grating Physics

A diffraction grating is essentially a multi-slit surface. It provides angular dispersion, i.e., the ability to separate wavelengths based on the angle that they emerge from the gr …

Technical Notes

Optical Transceiver Physics

OE converters typically employ photodiodes to absorb incoming photons and convert them into electrical current. Photodiodes are devices in which p-type, n-type, and intrinsic semiconductors …

Application Notes

IR Absorption Spectroscopy

IR spectroscopy can be used for both qualitative and quantitative non-destructive analysis of gases, liquids, pastes, powders, films, and surfaces. The absorption spectrum of a molecule …

Selection Guides

Optical Receiver Selection Guide

As the interface from a photonics experiment to electronic instruments, photodetection is critical to extracting and preserving experimental results. Newport's optical receivers and …

Selection Guides

Optical Sensor Finder

Our sensor finder allows you to easily find the sensor that best suits your application.

Tutorials

Light Collection and Systems Throughput

This discussion is restricted to the general use of Incoherent Light Sources, such as arc lamp or quartz tungsten halogen sources. Diffraction and coherent effects are excluded. The …

Tutorials

Optical Power Measurement

When a photon hits the photodiode material, it may generate an electron-hole pair depending on the quantum efficiency of the device. Quantum efficiency is dependent on many factors, …

Tutorials

PMManager™ Power Meter Application Software

PMManager is a powerful application software controlling and taking measurement data, compatible with models 1919-R, 843-R-USB and 841-PE-USB.

Selection Guides

Optical Power Meter Guide

Our offering ranges from a low cost, hand-held meter to the most advanced dual channel benchtop power meter available in market. Our 1936-R/2936-R series boasts state-of-the-art analog …

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