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

Germanium Detectors for Oriel Merlin™ Radiometry System

Product catalog summary

Overview: This document provides technical specifications and ordering information for Germanium Detectors used in the Oriel Merlin™ Radiometry System. These detectors extend the detectivity range of Merlin™ photodiode detectors to 1.8 µm and are known for their stability, linearity, and uniform responsivity.

Specifications:

Detectivity Range: Up to 1.8 µm.
Responsivity: Highly uniform, with TE cooled units improving low signal detectivity and stability.
Performance Range: 0.7 to 1.8 µm for photovoltaic mode detectors.
Measurable Power: Capable of measuring below picowatt powers with built-in transimpedance amplifiers providing 104 V/A to 109 V/A gain.

Calibration: Detectors are available in calibrated and standard versions. Standard models come with a single point calibration at 1500 nm. For absolute measurements at different wavelengths, NIST traceable calibrated models are recommended.

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

Ordering Information:

Non-Calibrated Models: 70339 (Room Temperature), 70340 (TE Cooled).
Calibrated Models: 70359 (Room Temperature), 70360 (TE Cooled).
Usable Range: 700 - 1800 nm with a 5 mm diameter active area.

Figures:

Fig. 1: Responsivity of Ge and InGaAs detectors.
Fig. 2: Dimensional diagram of Germanium detectors.

Catalog excerpts

Germanium Detectors for Oriel Merlin™ Radiometry System -1

1228 Phone: 1-800-222-6440 • Fax: 1-949-253-1680 S p e c t r o s c o p y I n s t r u m e n t s MONOCHROMATORS AND SPECTROGRAPHS BENCHTOP SPECTROMETERS MINISPECTROMETERS SINGLE CHANNEL DETECTION SYSTEMS AND CCD CAMERAS ACCESSORIES FOR FT-IR SPECTROMETERS SPECTROSCOPY INSTRUMENTS Germanium Detectors for Oriel Merlin™ Radiometry System Germanium Detectors These reliable detectors extend the detectivity range of Merlin™ photodiode detectors to 1.8 ìm. They are stable and linear, and highly uniform in their responsivity. The TE cooled units improve the low signal detectivity and stability, of the diode response. 0.8 0.6 0.4 0.2 0.0 800 1000 1200 1400 1600 1800 TYPICAL RESPONSIVITY (A/W) WAVELENGTH (nm) Ge InGaAs Fig. 1 Responsivity of Ge and InGaAs detectors. Cooled or Room Temperature Photovoltaic Mode Detectors These photovoltaic, unbiased mode detectors provide excellent performance in the 0.7 to 1.8 ìm range. We offer 5 mm diameter devices in both cooled and room temperature models. Measurable Power Below picowatt powers can be measured using these germanium detectors. Built-in transimpedance amplifiers provide 104 V/A to 109 V/A gain and selectable electronic filter settings. Calibration We offer calibrated and standard versions of these detectors. The standard models are shipped with a single point calibration at 1500 nm. Because of the spectral variation in response, the displayed value is only correct for 1500 nm. You can approximately correct the power reading (for other wavelengths) using the relative responsivity curves, if you know the spectral content of the incident radiation. For absolute measurements at different wavelengths, choose one of the NIST traceable calibrated models. Detector Systems Each Germanium Detector Package includes: • Germanium 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 • Chopper 109 107 105 104 108 106 G A I N V/A MAX TIME CONSTANT MED MIN 1.5 INCH SERIES FEMALE FLANGE 1/4-20 TAPPED HOLE 2.06 (52) 2.06 (52) 5.0 (127) 1.25 (32) Fig. 2 Dimensional diagram of Germanium detectors. Ordering Information Detector Type Model Wavelength Range Detector Active area Temperature Non Calibrated 70339 700-1800 nm Diameter 5 mm Room Temperature 70340 700-1800 nm Diameter 5 mm TE Cooled Calibrated 70359 700-1800 nm Diameter 5 mm Room Temperature 70360 700-1800 nm Diameter 5 mm TE Cooled • Stable, linear detectors • 700 - 1800 nm usable range See our website WEBfor more info

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