Photonics/Optics

Mode-Field Diameter and “Spot Size” Measurements of Lensed and Tapered Specialty Fibers

Lensed and tapered specialty fibers are designed to optimize coupling between the fiber and various optical components such as edge-emitting laser diodes and AWGs. The light from these fibers forms a focus at some finite distance away from the fiber end. The Mode-Field Diameter (MFD) and corresponding spot size of these fibers is typically in the range of 5 microns or less. These small spot sizes and corresponding high divergence present challenges to near-field and far-field measurements. Typically the near-field measurements are limited by the optical performance, and the far-field measures must extend to very large angles. Results of measurements of 6 commercially available fibers are presented here, including different type lensed/tapered fibers (4 axially symmetric and 1 elliptical) and a standard single-mode fiber for reference. Also, since the focused beams are in free space, there are some fundamental questions as to the applicability of the MFD, a measure originally formulated to describe the field distribution within a fiber.

Posted in: Articles, Features, ptb catchall, Photonics, Measurements, Fiber optics
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Designing COTS LCD Displays For Rugged Applications

Innovation, demand, and falling prices have resulted in high quality large format commercial-off-the-shelf (COTS) LCD displays moving from the living room to high availability, mission critical applications.

Posted in: Articles, Applications, ptb catchall, Photonics, Human machine interface (HMI), Displays
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Organic Solar Cell

Heliatek GmbH (Dresden, Germany) has developed 1.1 cm² tandem cells manufactured with a low temperature deposition process that have an efficiency of 9.8 %, a new world record for organic solar cells. The percentage was measured and certified by the independent Fraunhofer ISE CalLab (Freiburg, Germany) under standard test conditions.

Posted in: Products, Products, ptb catchall, Photonics
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Metal Adapter

The ELIO® AQ metal adapter from Souriau (York, PA) enables a standard ELIO® optical contact to be inserted into the size-8 Quadrax cavity of several connector types. The ELIO® AQ adapter is already available for connectors in the MIL-DTL-38999/EN3645 series III, ARINC 404, and ARINC 600 ranges. The adapter operates in a harsh operating environment, with temperatures from -65°C to +125°C and intense vibration.

Posted in: Products, Products, ptb catchall, Photonics
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LED Driver ICs

Power Integrations (San Jose, CA) has announced LinkSwitch-PH LED driver ICs in an eSIP™-7F (L package) that measures 2mm high. The Lpackage includes a heat transfer tab on top of the device, which is electrically quiet so additional heatsinks do not contribute to electrical noise propagation.

Posted in: Products, Products, ptb catchall, Photonics
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Laser Welding System

Miyachi Unitek Corporation (Monrovia, CA) has released its new LF Fiber Laser Welding Systems, specially designed for fine micro welding. The LF handles focused spot sizes down to 10 microns, and offers control of pulse width and peak power. The laser is available in either single-mode or multi-mode options.

Posted in: Products, Products, ptb catchall, Photonics
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Tunable Short-Pulse Laser

The Vitara laser from Coherent (Santa Clara, CA) delivers pulsewidths shorter than 12fs. The product offers automated wavelength tuning over a 755nm to 860nm range and pushbutton bandwidth adjustment from 30nm to 125nm. The output power of Vitara peaks at over 450mW due to its integrated Verdi G 5W pump laser.

Posted in: Products, Products, ptb catchall, Photonics
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Camera Platform

The Visiosens VFU Camera Platform from FRAMOS (Camberley, UK) has more than 200 camera variants per image sensor. The tool comprises CCD and CMOS image sensors ranging from 0.3 to 10.0 megapixels, a variety of output interfaces including USB 2.0 & USB 3.0 (through a Mini-B USB jack with horizontal screw lock), complementary assembly concepts, mounts, and filters. For all variants, the user and system interface is built on a unified, cross-platform software development kit based on the latest .NET™ technology and compatible with Windows and Linux.

Posted in: Products, Products, ptb catchall, Photonics
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CMOS Cameras

Baumer (Southington, CT) has introduced its HXC20NIR and HXC40NIR CMOS cameras, which measure electroluminescence in the near-infrared (NIR) light spectrum. Compared with monochrome technology, the cameras are twice as sensitive at a wavelength of 900 nanometers, using electroluminescence to effectively detect fractures and failures in the crystal structure of a solar wafer.

Posted in: Products, Products, ptb catchall, Photonics
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Custom Optical Mirrors

Precision Glass & Optics (Santa Ana, CA) recently provided optical mirrors that are integrated into a 360-degree high definition (HD) video camera system developed by Social Animal (www.socialanimal.tv). The SA360 Video Camera System offers 2K resolution, cinema-quality footage, captured simultaneously and stitched together to create a 360-degree panoramic view.

Posted in: Products, Products, ptb catchall, Photonics
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