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MICRO-CONTROLE / Spectra-Physics
InGaAs Detectors for Oriel Merlin™ Radiometry System

InGaAs Detectors for Oriel Merlin™ Radiometry System

Product catalog summary

Overview: The document provides detailed information on InGaAs detectors used in spectroscopy instruments, specifically focusing on their application with the Cornerstone™ 260 Monochromator and Merlin™ Radiometry System.

Specifications: InGaAs detectors are direct bandgap semiconductor devices known for their excellent speed of response and linearity. They operate within a wavelength range of 0.8 to 1.7 µm, with specific focus on 1.3 µm and 1.55 µm wavelengths. TE cooling is available for enhanced performance in radiometric applications.

Performance: TE cooled detectors offer superior stability and response due to thermal stabilization down to -20°C. Room temperature detectors are suitable for operations not at the extremes of their spectral range.

Calibration: Standard models come with a single point calibration at 1.55 µm. Calibrated models with NIST traceable responsivity factors are available for precise measurements across the 0.8 to 1.7 µm range.

Components: Each detector package includes an InGaAs detector element, housing with built-in preamplifier, and necessary cables. Additional components required include a 77055 Cooler Controller, Merlin™ Control Unit, and Optical Chopper.

Ordering Information: The document lists models for both calibrated and non-calibrated detectors, specifying their wavelength range, active area, and operating temperature.

Figures:

Fig. 1 illustrates the measurable power of the TE cooled 70348 detector.
Fig. 2 shows the relative responsivity of the 70348 InGaAs detector across the wavelength range.

Catalog excerpts

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: [email protected] • 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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