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14 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...
Optical System Optimization: Analyzing the Effects of Stray Light
Richard Pfisterer, Photon Engineering LLC
Electrical engineers are very familiar with the effects of shot noise, thermal noise, flicker noise and crosstalk, and recognize how these effects can reduce the signal-to-noise ratio (SNR) in their...
Silicon Photonics: Light Is the Ultimate Medium for High-Speed Communications
Christophe Kopp, Ségolène Olivier, and Stéphane Bernabé, CEA-LETI
Silicon photonics is widely considered a key enabling technology for further development of optical interconnect solutions needed to address growing traffic on the internet. From the first submarine...
Tunable Light Sources: A Popular Choice for Measurement Applications
VICKI LU and JOHN PARK, PhD, MKS/Newport
Many common spectroscopic measurements require the coordinated operation of a detection instrument and light source, as well as data acquisition and processing. Integration of individual components...
Fiber Optics: Understanding the Basics
Engineering and Marketing Staff, OFS
Optical fibers are made from either glass or plastic. Most are roughly the diameter of a human hair, and they may be many miles long. Light is transmitted along the center of the fiber from one end...
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...
Optical Coating: Materials and Deposition Technology
CERAC, Inc., a subsidiary of Williams Advanced Materials; technical assistance from Pellicori Optical Consulting
Optical coatings are deposited as thin-film multilayers of a variety of materials using specific deposition techniques. Coatings are applied to optical components that are intended for use at...
Photometry: The Answer to How Light Is Perceived
Photo Research, Inc.
That portion of the spectrum that the eye can see — and its rainbow of colors — is rather small, covering approximately 360 to 830 nm. What colors we perceive depends on wavelength, while...
Radiometry: A Simplified Description of Light Measurement
Angelo V. Arecchi, Labsphere, Inc.
Radiometry involves several activities. The two most common are the description and measurement of optical radiation, and, starting with the knowledge of some aspects of optical radiation at one...
Image Processing: Turning Digital Data into Useful Information
William Silver, Cognex Corp.
Images are produced by many means: cameras, x-ray machines, electron microscopes, radar and ultrasound. They are used in the entertainment, medical, scientific and business industries; for security...
Illumination Design and Analysis Software: A Vital Tool in the Designer’s Kit
Breault Research Organization, Inc.
Illumination design has developed rapidly to include not only automotive headlamps and street lamps, but also backlit displays, fluorescent panel lighting, light-emitting diode or laser sources, and...
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...
The VCSEL Advantage: Increased Power, Efficiency Bring New Applications
L. Arthur D’Asaro, Jean-Francois Seurin and James D. Wynn, Princeton Optronics, Inc.
Unlike an edge emitter, a VCSEL has a maximum operating power that is not limited by catastrophic optical damage of the exit aperture because its aperture is larger and its PN junction does not...
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...
Photonics Handbook
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