Photonics/Optics

Network Activation Kit

AFL (Spartanburg, SC) offers network activation kits designed to support installation and commissioning of optical equipment in telecom, broadband, and other single-mode optical fiber networks. All network activation kits include the AFL VOA6 single- mode variable optical attenuator, the AFL One-Click Mini cleaner, and AFL’s OPM4-4D optical power meter. Each broadband activation kit also features an AFL OLS7-FTTH optical light source, and all equipment is calibrated for industry- standard upstream and downstream FTTx signals. Telecom activation kits also include an AFL OLS2-DUAL optical light source. Equipment is calibrated for standard telecom wavelengths. Network activation kits can be ordered with hard-sided or soft, padded carry cases.

Posted in: Products, Products, ptb catchall, Photonics

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Transmission Electron Microscope

A 200kV transmission electron microscope from JEOL (Peabody, MA) delivers nanoanalysis for process and quality control of mass-produced semiconductor and materials samples. The multi-function JEOL JEM-2800 features high resolution imaging in TEM, STEM, and SE modes; ultrasensitive elemental mapping with a large angle Energy Dispersive Spectrometer (EDS); Electron Energy Loss Spectroscopy (EELS) for chemical analysis; critical dimension analysis; tomography; and in situ observation of samples. The TEM functions without use of the traditional fluorescent screen on the electron column. The JEM-2800 speeds specimen observation through automatic functions including adjustment of focus, astigmatism, contrast, brightness, crystal zone axis alignment, and height. The JEM-2800 has an operator navigation system and on-screen operating guide. Additional features and key specifications of the JEM-2800 include a Schottky field-emission electron gun; stable eucentric side-entry goniometer stage; a magnification range of 100x to 150,000,000x using STEM; 0.1nm TEM resolution; and 0.20nm BF/DF STEM resolution.

Posted in: Products, Products, ptb catchall, Photonics

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Tryptophan Fluorescence of Ocular Lens Protein for Early Diagnosis of Cataracts

Findings could spur the development of a clinically useful, non-invasive tool sensitive enough to detect, diagnose, and monitor lens change earlier than current methods. Cataracts are the leading cause of blindness worldwide; they affect more than 20 million people and result in ~1.3 million operations annually in the United States. Current methods of cataract detection are based on subjective observation of lens opacity by Rayleigh light scattering using a slit lamp. These methods are not sensitive enough to reveal structural changes on a molecular level; they can only reveal defects once their size becomes comparable with the optical wavelength (400-600 nm). This occurs at a very late stage of cataract development.

Posted in: Bio-Medical, Briefs, Briefs, Diagnostics, Photonics

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Specialized Thin Film Coatings for Unmanned Aircraft Systems

Unmanned aircraft systems (UAS) and their applications are experiencing rapid growth, especially in the area of remote sensing. Advances in propulsion; airframe materials; communications, command and control (C3) systems; cameras and detectors; and image processing are combining to continuously improve UAS capabilities. Most optical systems used in unmanned aircraft systems function over the visible (VIS) and near-infrared (NIR) wavelength ranges. Increasing in importance is multispectral or hyperspectral imaging which can combine information from VIS, NIR, mid-wave infrared (MWIR), and long-wave infrared (LWIR) wavelength regions to provide enhanced detection, such as chemical, vehicular, or terrain identification capabilities not available by the use of imaging alone. This article will cover some of the basics of optical thin film coatings as applied to electro-optical systems commonly used in unmanned systems (Figure 1).

Posted in: Articles, Features, ptb catchall, Photonics

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Fine Laser Cutting Technology

Fine laser cutting is an ideal technology for specialized cutting requirements found in the manufacturing of medical tube tools and components. From surgical instruments used in cutting and biopsy, to needles containing unusual tips and side wall openings, to puzzle chain linkages for flexible endoscopes, laser cutting provides higher precision, quality, and speed than traditionally used cutting techniques. In addition, new laser cutting technologies are now coming to market, including a 5-axis motion package that gives the designer freedom to cut more challenging geometries in one pass.

Posted in: Application Briefs, Applications, ptb catchall, Photonics

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Polished Panel Optical Receiver for Simultaneous RF/Optical Telemetry With Large DSN Antennas

Three options are examined. The “polished panel” optical receiver concept described here makes use of aluminum panels on the main reflector of the Deep Space Network’s (DSN’s) 34-meter antennas at optical wavelengths by polishing and coating their surface to efficiently reflect nearinfrared wavelengths in the 1,064–1,550- nanometer range. Achievable surface smoothness is not a limiting factor for aluminum panels, and initial field experiments indicate that the surface quality of microwave aluminum panels is sufficient to concentrate the light into small, but not diffraction-limited, spots at their primary focus. Preliminary analysis of data from high-quality microwave panels has shown that the light can be concentrated into 200–400 microradian cones, resulting in spot diameters of 2–4 mm at the 10-meter primary focus F0 shown in the figure, or 2–4 cm spots at F1 after magnification by the subreflector, which results in an effective focal length of about 100 meters. Three distinct implementation options are possible, with theoretically identical tracking and communications performance:

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

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Universal Polishing Fixture

The Universal Workholder (UVG) from Krell Technologies (Morganville, NJ) is designed to polish any fiber optic component that incorporates a UPC-style ferrule with a diameter between 1.25 mm and 3.2 mm. The fixture works with industry-standard connectors: SC, FC, ST, LC, MU, E2000, and SMA. M29504, TFOCA, and ARINC 801 mil-spec termini and contacts can also be loaded in the device. The UVG integrates independent suspension and optical alignment at each component position. Independent suspension permits automated air polishing and provides equalized pressure distribution for each component. Optically aligned positions yield Telcordia compliance for endface geometry. In addition to standard connectors and termini, the UVG can accommodate many devices that integrate lightguides.

Posted in: Products, Products, ptb catchall, Photonics

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