Oriel InGaAs and Ge Detectors
1 /2Pages

Catalog excerpts

1238 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 Oriel InGaAs and Ge Detectors InGaAs and Ge Detectors This family of InGaAs and Ge detectors covers the spectal information rich 0.7 to 2.5 ìm NIR measurements. These detectors are operated in the photovoltaic (unbiased) mode to provide the lowest noise for DC and low frequency operation since it avoids the shot noise associated with bias currents. One unit, model 71898, comes with a DC bias arrangement producing 1 ns rise times. We offer amplified and un-amplified, calibrated and non calibrated models, as well as TE cooled and room temperature versions. Their large areas make signal capture easy. The 1.5 Inch Series flange allows instant connectivity to other Oriel instruments, such as monochromator exit slit assemblies. Use the Ge detectors to get beyond the 1.6 ìm limit of standard InGaAs. 0.8 0.6 0.4 0.2 0.0 800 1000 1200 1400 1600 1800 TYPICAL RESPONSIVITY (A/W) WAVELENGTH (nm) Ge InGaAs Calibration Fig. 1 Typical Responsivity of InGaAs and Ge Detectors We offer calibrated and standard InGaAs and Germanium detectors. The calibrated InGaAs detectors come with NIST traceable calibrated responsivity factors for the 0.8 to 1.7 ìm range. The Germanium detectors NIST traceable calibrated responsivity factors cover the 0.7 to 1.8 ìm range. Detectors are available with and without a built-in transimpedance amplifier. Table 1 gives the gain/bandwidth information for the built-in transimpedance amplifier. The amplifier provides transimpedance gains from 104 V/A to 109 V/A. It also offers three selectable time constant settings to allow you to match the upper bandwidth limit with your experimental needs. Operating at the lowest bandwidth setting allows you to operate at the lowest noise levels. The amplified models require +/-15 V DC; the 70703/70709 Power Supply (described on page 1247) provides the required power. Table 1 Bandwidth Values Time Constant Gain 104 V/A 105 V/A 106 V/A 107 V/A 108 V/A 109 V/A "MIN" 100 kHz* 100 kHz* 80 kHz 8 kHz 800 Hz 80 Hz "MED" 100 kHz 10 kHz 1 kHz 100 Hz 10 Hz 1 Hz "MAX" 1 kHz 100 Hz 10 Hz 1 Hz 0.1 Hz 0.01 Hz * The bandwidth is inversely proportional to gain only up to the limiting bandwidth of the amplifier. There may be a lower system limit due to the detector or other electronic element. Cooled or Room Temperature? You will do well with room temperature InGaAs and Ge devices under most measurement conditions. Both are quite stable. However, the responsivity of the diodes is sensitive to temperature changes. It can go up or down with temperature, depending on the spectral range in which you operate. Therefore, whenever you are looking for measurement reproducibility of better than ~2%, temperature stabilization becomes a necessity. Our TE cooled devices, combined with the 77055 Temperature Controller (see page 1242), give you excellent stability of readings. The added benefit of TE cooling is the reduction of noise levels which allows you to reach the limits of device performance. 50Ù Termination Use a 50Ù termination when measuring 100 ns pulse widths or 10 MHz modulated signals to avoid electronic echoes generated by signal reflections at impedance mismatch locations. Electronic Accesories The 77055 Cooler Controller see page 1242() allows full function of the TE cooled devices. The 70703/70709 Power Supply (see page 1247) provides the required ±15 V for the amplifiers. Connectors and Cables All detectors have a BNC connector for signal out. We ship these detectors with a 6 ft. (1.8 m) long BNC cable; the amplified models also include a 6 ft. (1.8 m) long cable with 3 pin banana plug, for connection to the 70703/70709 Power Supply. • Large area models • Room temperature and cooled models • Models with spectral calibration Amplification

Open the catalog to page 1

S p e c t r o s c o p y I n s t r u m e n t s 1239 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 UNAMPLIFIED DETECTORS 1/4-20 TAPPED HOLE 1.5 INCH SERIES FEMALE FLANGE AMPLIFIED DETECTORS 1.5 INCH SERIES FEMALE FLANGE 1/4-20 TAPPED HOLE 5.0 (127) 2.06 (52) 2.06 (52) 1.25 (32) 2.06 (52) 2.06 (52) 2.06 (52) 1.25 (32) 10 9 10 7 105 10 4 108 106 G A I N V/A MAX TIME CONSTANT MED MIN Fig. 2 Dimensional Drawings of some...

Open the catalog to page 2