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19 articles
Photonics Handbook
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What Is Photonics?
Photonics Media Editors
Photonics is the study of light and other types of radiant energy whose quantum unit is the photon. The impact of photonics on research, technology, navigation, culture, astronomy, forensics, and...
Nanopositioning: A Step Ahead
Scott Jordan, Brian Lula, and Stefan Vorndran, PI (Physik Instrumente) LP
By its original definition, a nanopositioning device is a mechanism capable of repeatedly delivering motion in increments as small as one nanometer. Lately demands from industry and research have...
Measuring Small-Beam MFD: Overcoming the Challenges
DERRICK PETERMAN, PhD, MKS Ophir
Profiling beams under 10 µm in size is one of the more challenging beam profiling applications. There are numerous reasons for this, including the very small size. Focal plane arrays commonly...
Laser Measurement Systems: Best Practices
JOHN MCCAULEY, MKS Ophir
Given the pace at which technology advances, there always seems to be a learning curve. With the abundance of consumer electronics available, there typically is no right or wrong way to use these...
Lasers: Understanding the Basics
Coherent Inc.
Over 60 years have passed since the first demonstration of a laser in 1960. After the initial spark of interest, lasers were for a while categorized as “a solution waiting for a problem,”...
Diode-Pumped Lasers: Performance, Reliability Enhance Applications
Arnd Krueger and Scott White, MKS/Spectra-Physics
Neodymium-doped crystals and glasses such as Nd:YAG (neodymium:yttrium aluminum garnet) have long been used as laser gain materials. Optically pumped, they produce an output wavelength close to 1...
Integrating Spheres: Collecting and Uniformly Distributing Light
Greg McKee, Labsphere Inc.
An integrating sphere’s function is to spatially integrate radiant flux (light). However, before one can optimize a sphere design for a particular application, it is important to understand how...
Spectroscopy: The Tools of the Trade
Dr. John R. Gilchrist, Clyde HSI
All optical spectrometry techniques rely on the measurement of radiant power. The configuration of the instrument varies based on the measurement technique: absorption, emission, luminescence, or...
Positioning System Performance: Understanding the Rules
MKS/Newport
Abbe Error — Linear off-axis errors introduced by angular deviations coupled to a moment arm at the point of interest on stage mounted devices (θ in Figure 1). The effect of Abbe error...
Photonics Packaging: Optical Communication Components
Torsten Wipiejewski, VNT Management Oy, German Office
Photonic components are key elements for the information technology (IT). Photonics technology covers the generation of information (cameras, sensors), its transportation (optical communication),...
Adhesives for Fiber Optics Assembly: Making the Right Choice
Edward A.Y. Fisher, Henkel Corp.
Adhesives for fiber optic components that perform well on glass, metal, ceramic and most plastic substrates provide excellent chemical and solvent resistance. They also can act as an electrical...
Beam Diagnostics: Meeting the Need for High Quality
Coherent, Inc.
For any discussion of laser beam diagnostics, it is first necessary to define some terms that characterize beam properties. Broad definitions can include measurements of laser energy or power,...
Photomultipliers: Low-Light, High-Speed Specialists
Ken Kaufmann, Hamamatsu Corporation
The applications where rapid detection of light is a must are many. They include a wide variety: semiconductor inspection, gene sequencing, oil well logging and high-energy physics. The reasons for...
SWIR Imaging: An Industrial Processing Tool
Sensors Unlimited Inc., A Collins Aerospace company
Imaging has long been used in industrial processes to measure, monitor, control, or otherwise manage the production of goods. The challenge to the process designer is to develop a tool that captures...
Polarization in Fiber Systems: Squeezing out More Bandwidth
Steve Yao, General Photonics Corp.
As bit rates increase to meet expanding demand, systems have become increasingly sensitive to polarization-related impairments. These include polarization mode dispersion (PMD) in optical fibers,...
Machine Vision Lighting: A First-Order Consideration
SCHOTT North America, Inc., Fiber Optics
In the beginning, automated inspection focused on the camera and optics, the algorithms, the interface hardware and the processor. Only rarely was attention paid to the lighting system or lighting...
Semiconductor Lasers: An Overview of Commercial Devices
JDSU
Laser diodes vary widely in their wavelengths, powers, spectra and beam quality. Yet they share two fundamental components with all other lasers: an optical amplifier and a resonator that confines...
Polarization Mode Dispersion: Concepts and Measurement
Paul Hernday, Fiber Optic Measurement Training and Consulting
There are three fundamentally different dispersive phenomena in optical fiber, of which polarization mode dispersion (PMD) is the most complex. In digital multimode fiber systems, a light pulse...
NSOM: Discovering New Worlds
M. Kovar, Midako A. Nohe, N.O. Petersen and P.R. Norton, University of Western Ontario
NSOM is suitable for studies on the mesoscopic scale (several tens to hundreds of molecular dimensions). It has become an important tool in research and applications of semiconductors, organic layers...
Photonics Handbook
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