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microwave intrusion and motion sensors and security fences, coastal surveillance as well as sophisticated equipment for research and development.
The firms latest FBGAs employ a highly efficient Volume Phase Grating (VPG) as the spectral dispersion element and an ultra sensitive InGaAs array detector as the detection element. They provide high-speed parallel processing and continuous spectrum measurements.
As an input, the device uses a tapped signal from the main data transmission link through a single mode fiber, then collimating it with a micro lens. The signal is spectrally dispersed with the VPGVPG, and the diffracted field is focused onto an InGaAs array detector. The control electronics read out the processed digital signal to extract required information. Both the raw data and the processed data are available to the host.
The invention of optical fiber and semiconductor lasers in the 1960s opened new applications in communications and sensing.
Optical fibers provide a fundamental improvement over traditional methods offering lower loss, higher bandwidth, immunity to electromagnetic interference, lighter weight, lower cost, and lower maintenance.
By applying a UV laser to ‘burn’ or write a diffraction grating (a Fiber Bragg Grating (FBG)) in the fiber it became possible to reflect certain wavelength of light, which used together with an interrogation analyzer precise sensing measurements could be taken.
This technology is widely used for Dense Wavelength Division Multiplexing (DWDM) applications, for real time fault detection and imbedded monitoring of smart structures (stress measurement).
The FBGAs are available in two versions: a standard high speed FBG analyzer and an infrared FBG analyzer. Both FBG analyzers represent integrated spectral engines with an internal reference source that interrogates multiple wavelengths for precise FBG sensor system measurements requiring high end of life wavelength accuracy at high frequency response time. The
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www.compoundsemiconductor.net August/September 2010
“The XLamp MX-3 is designed for customers who demand lighting-class performance across their entire product line,” said Paul Thieken, Cree director of marketing, LED components. “With the industry’s tightest color consistency and uniform angular chromaticity, Cree continues to set performance standards for longevity and consistency.”
XLamp MX-3 LEDs are available in sample quantities immediately and production quantities with standard lead times.
devices cover wide wavelength ranges and provide simultaneous measurements at very fast response rates and are claimed to have excellent wavelength resolution.
Cree MX-3 LED Down to a Tea for Color Consistency & Uniformity
Cree’s new MX-3 LED from the XLamp series delivers over 100 lumens. It is suited to a broader range of applications in the LED bulb, retail display and linear lighting markets than previous versions.
Cree, a major player in LED lighting, is marketing the commercial availability of its new 100+ lumen XLamp MX-3 LED. The MX-3 LED extends Cree’s lighting-class performance to a broader set of applications with enhanced light uniformity and LED-to-LED color consistency.
The MX-3 delivers luminous flux of up to 122 lm at 350 mA in cool white (6500K) and up to 100 lm at 350 mA in warm white (3500K). The MX-3 offers design simplicity and flexibility, sharing a common footprint with Cree’s XLamp MX-6 LED. The firm says it is ideal for LED bulbs, retail display lighting and high-flux distributed illumination such as cove lighting and wall washing.
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