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Robust Mapping of Incoherent Fiber-Optic Bundles

Images scrambled by the bundles can be unscrambled. Marshall Space Flight Center, Alabama A method and apparatus for mapping between the positions of fibers at opposite ends of incoherent fiber-optic bundles have been invented to enable the use of such bundles to transmit images in visible or infrared light. The method is robust in the sense that it provides useful mapping even for a bundle that contains thousands of narrow, irregularly packed fibers, some of which may be defective.

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

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Product of the Month: High-Power Microscope

FEI (Hillsboro, OR) has released the PhenomTM microscope, bridging the performance gap between optical and scanning electron microscope (SEM) technologies. Capable of yielding magnification up to 20,000× — 20 times higher than most advanced optical scopes — and with an ultimate resolution of 30nm, the Phenom addresses a wide variety of industrial and academic applications including quality assurance, product development, research, and testing.

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Optical Time Domain Reflectometer

Luna Technologies (Roanoke, VA) has announced the Optical Backscatter Reflectometer (OBRTM) 4400, an optical time domain reflectometer (OTDR) that can diagnose, locate, and troubleshoot problems in fiber optic components and assemblies such as splices, breaks, connectors, bends, and hot-spots. The OBR 4400 features micrometer spatial resolution, range to 2 km, and sensitivity of -130 dB. Integrated distributed sensing capability enables users to view the effects from component-level heating in optical amplifiers, monitor temperature inside cabinets and enclosures, and identify the location of fiber assemblies by touching the fiber. The OBR 4400 is also suitable for use in component manufacturing, aerospace installation and maintenance testing, mobile platforms, and secure networks.

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Modular LED Test System

Edmund Optics (Barrington, NJ) has released the MLED modular LED test and measurement systems available in three configurations for making measurements on discrete LEDs, arrays, and assemblies. The MLED-2 version includes a 2-inch diameter integrating sphere with a ½-inch diameter input port for making measurements on discrete devices. The MLED-6 system includes the MLED-2 along with a 6-inch integrating sphere assembly, and is suitable for intensity measurements of LEDs and for flux measurements of LED assemblies up to 1.5-inch in diameter. The MLED-12 system consists of the MLED-2 base and a 12-inch integrating sphere with 4-inch diameter port, and is suitable for flux measurements of larger LED assemblies and arrays. The MLED base systems consist of a 2048-element CCD spectrometer, an internal calibration lamp with power supply, and a set of three calibrated neutral density filters. The CCD spectrometer offers a resolution of 1.5 nm with 0.5 nm accuracy over a range of 350 to 1000 nm. The detector can measure luminous flux to 200 lumens using the OD2 filter. Exposure time ranges from 5 ms to 3 sec and stray light is 0.05% at 600 nm.

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Continuous Wave Laser

OSRAM Opto Semiconductors (Regensburg, Germany) has introduced a continuous wave laser offering thermal resistance of 2.5 K/W, an output of up to 6W, and a footprint measuring 6.0mm × 4.5 mm. It emits light at a wavelength of 810 nm through a prism that directs the laser’s light upwards. These capabilities allow the CW laser to be placed in any location on a circuit board. Operating temperature ranges from -40° to 100°C and the thermal conductivity of its base allows the laser unit to be soldered directly onto a metal core board. The system is suitable for volume applications such as night vision systems, closed circuit television, traffic monitoring, and medical applications.

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Laser Diode

Photonic Products (Hertfordshire, UK) has launched the Opnext HL6750MG 685nm Al-GaInP laser diode with a multi-quantum well structure. It has an optical output power of 50 mW CW, a package size of 5.6 mm, and a built-in photodiode for monitoring laser output which enables control of the auto power circuit. Supplied in a 5.6mm package, the Opnext HL6750MG is a single longitudinal mode laser diode with an optical power of 50 mW CW at a visible wavelength of 685 nm. It features an operating current of 75 mA, an operating voltage of 2.3 V, and a threshold current of 30 mA. The monitoring output current is 0.15 mA, while the operating temperature range is -10°C to 70°C. The Opnext HL6750MG is suitable for use in medical and biomedical applications such as X-ray scanners, industrial and medical sensor light sources, and as a light source for optical equipment such as distance meters, barcode scanners, and high-resolution CTP.

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Laser Alignment Module

BFi OPTiLAS (Evry, France) has developed the 300-0100-00 series 645nm laser alignment module offering a range of interchangeable, pre-aligned, precision optics: 88 degrees cross, 58 degrees line, 58 degrees cross/spot. The focus is user adjustable, as is the laser intensity (from 0.1 mW to 4.5 mW), allowing brightness to be optimized for the target material. The laser diode module incorporates anti-surge, anti-static, and reverse polarity protected electronics, an anti-reflection coated scratch resistant glass window, and a 2.11 mm jack socket to ease installation and replacement. The 300-0100-00 series comes in a 14mm housing, and each module is supplied with an adjustable mounting bracket, wall plug power supply, and power adjustment tool. Optional accessories include a 4-outlet junction box, 2m and 5m power extension leads, and all interchangeable optics heads.

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