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InGaAs Detectors for Oriel Merlin™ Radiometry System

InGaAs Detectors for Oriel Merlin™ Radiometry System
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InGaAs Detectors for Oriel Merlin™ Radiometry System - 1

S p e c t r o s c o p y I n s t r u m e n t s 1227 Email: sales@newport.com • Web: newport.com MONOCHROMATORS AND SPECTROGRAPHS SINGLE CHANNEL DETECTION SYSTEMS MINISPECTROMETERS BENCHTOP SPECTROMETERS AND CCD CAMERAS FT-IR SPECTROMETERS ACCESSORIES FOR SPECTROSCOPY INSTRUMENTS InGaAs Detector mounted to output of Cornerstone™ 260 Monochromator. These direct bandgap semiconductor devices have excellent speed of response and linearity. They are a little bit noisier than silicon detectors, due to the smaller band gap, and therefore we offer one with two-stage TE cooling for radiometric applications. The 1.3 ìm and 1.55 ìm wavelengths, lie within the 0.8 to 1.7 ìm detection range. Transmission and loss measurements can be done most accurately with these extremely stable and sensitive detectors. 10-12 10-13 0.80 0.95 1.10 1.25 1.40 1.55 1.70 WAVELENGTH (ìm) WATTS Fig. 1 Measurable power of the TE cooled 70348 detector, operated by Merlin™. InGaAs Detectors for Oriel Merlin™ Radiometry System Room Temperature vs Cooled We achieve excellent stability of response with the TE cooled detectors as a result of the inherent qualities of the diode and thermal stabilization at temperatures down to -20°C. The room temperature detectors will serve you well if you don't work too close to the extremes of their spectral range, especially at 1.7 ìm. Calibration The stability and linearity of response of our InGaAs detectors makes them excellent candidates for calibrated measurements. We ship the standard models with a single point calibration at 1.55 ìm. Use the typical responsivity curve shown in Fig. 2 to approximate responsivity at other wavelengths. For highest accuracy, we offer calibrated models with NIST traceable calibrated responsivity factors for the 0.8 to 1.7 ìm range. Detector Systems Each InGaAs detector package includes: • InGAs detector element • Detector housing with built-in preamplifier • All necessary interconnecting cables You will also need to order: • 77055 Cooler Controller for the cooled systems (described on page 1242) • Merlin™ Control Unit • Optical Chopper • Excellent speed of response and linearity • Calibrated models Ordering Information Detector Type Model Wavelength Range Detector Active area Temperature Non Calibrated 70347 800-1700 nm Diameter 3 mm Room Temperature 70348 800-1700 nm diameter 3 mm TE Cooled Calibrated 70367 800-1700 nm Diameter 3 mm Room Temperature 70368 800-1700 nm diameter 3 mm TE Cooled See our website WEBfor more info RELATIVE RESPONSIVITY WAVELENGTH (ìm) 0.80 0.95 1.10 1.25 1.40 1.55 1.70 1.0 0.8 0.6 0.4 0.2 0.0 Fig. 2 Relative responsivity of the 70348 InGaAs detector.

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