Photonics/Optics

RxGen General Optical Model Prescription Generator

RxGen is a prescription generator for JPL’s in-house optical modeling software package called MACOS (Modeling and Analysis for Controlled Optical Systems), which is an expert optical analysis software package focusing on modeling optics on dynamic structures, deformable optics, and controlled optics.

Posted in: Photonics, Briefs, ptb catchall, Tech Briefs, Photonics

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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: Features, Articles, Features, ptb catchall, Photonics

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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

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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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