Oriel Pb and PbSe Detectors
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1240 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 Pb and PbSe Detectors PbS and PbSe Detectors These versatile lead salt photoconductors provide sensitive near infrared detection from 1 to 4.5 ìm. Two stage TE cooled and uncooled versions are offered. We offer them AC coupled, since the 1/f noise, caused by the bias current, makes them poorly suited for DC operation. These detector heads include a preamplifier (requiring ±15 Vdc power) and a built-in fixed bias supply (requiring a +5 Vdc input). PbS @ 289K PbSe @ 298K PbSe @ 243K PbS @ 243K WAVELENGTH (nm) NOISE EQUIVALENT POWER (W Hz )-1/2 10-9 10-10 10-11 10-12 1000 2000 3000 4000 5000 6000 Fig. 1 NEP of PbS and PbSe Detectors. Which Detector Do I Choose? Use the 3 x 3 mm room temperature detectors when signals are strong. Use the 1 x 3 mm, TE cooled detectors when signals are weak and you want to optimize your S/N, especially when using monochromators (the 1 x 3 mm aspect ratio is better matched to a monochromator slit shape). You can use these detectors to monitor DC signals by periodically chopping the input beam. The signal can then be displayed on an oscilloscope, displayed on our Optical Power Meters, or used as an input to a lock-in amplifier. The gain of the built-in amplifier can be matched to the display electronics. A higher gain is needed to bring the signal to the mV levels needed for oscilloscope display. The lowest gain is suitable for matching the noise voltage to the resolution capability of a narrow band lock-in amplifier. Voltages and Controls These detectors operate in a photoconductive mode. As such, they require ~100 V bias for proper operation. A bias power supply is built into the detector and all that is required is ±15 V for the amplifier and +5 V for the bias power supply. The 70703/70709 Power Supply (page 1247) will serve to provide the necessary voltages. Cooled units require the 77055 Temperature Controller (page 1242) to power and stabilize them. Mounting and Cables These mounted detectors have a 1.5 Inch Series female flange. All the necessary interconnecting cables are shipped with the detectors. • Excellent detectors for the 1 to 4.5 ìm region • Low noise signal amplifier • Built-in bias supply • Selectable gains of 2, 10, and 50 109 107 10 5 104 108 106 G A I N V/AV/A MAXMAX TIME CONSTANT TIM E CON STA NT MED MINMIN 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 PbS and PbSe Detectors

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S p e c t r o s c o p y I n s t r u m e n t s 1241 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 Specifications Voltage Gain 2x, 10x or 50x selectable Amplifier Bandwidth 10 Hz to 10 kHz (3 dB) Connectors 9 pin D-sub male (power in and signal out) BNC (signal out) 4 pin LEMO (TE cooler controller) Power Requirements ±15 Vdc, 20 mA + 5 Vdc, 65 mA Ordering Information PbS and PbSe Detectors Model Description Detector...

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