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RIP1-NJAC APD Receivers

Photonics.com
Apr 2010
Voxtel Inc.
 
BEAVERTON, Ore., April 5, 2010 — Voxtel Inc. has announced the release of a near-infrared avalanche photodiode (APD) receiver with 1-GHz bandwidth and a large 200-µm-diameter optical area. Suitable for laser rangefinder, laser designator, free-space optical communications, optical instrumentation and ladar/lidar applications, it is the latest entry in the company’s Siletz line of back-illuminated single-carrier multiplication avalanche photodiode (SCM-APD) products.

The receiver integrates the low-excess-noise SCM-APD with a low-noise transimpedance amplifier. The NIR/SWIR (short wavelength infrared) APDs have an equivalent ionization coefficient (keff) of <0.02 and enable the receiver to operate at high avalanche gain, boosting the optical signal over the amplifier noise level without the degrading effects of avalanche-induced excess noise.

The ultralow excess noise and high gain make the photoreceivers highly sensitive, offering a maximum responsivity of >50 A/W at 1550 nm, with operating gain up to 50. Typical wavelength range is from 1064 to 1550 nm, maximum dark current is 195 kV/W, typical low-frequency cutoff is 65 kHz, and thermal load is 83 mW.

A single-stage thermoelectric cooler is included to eliminate temperature-induced gain variation and allow optimal performance over a range of application environments. The receiver is available with optional fiber pigtail input and a variety of standard fiber connectors.

For more information, visit:  www.voxtel-inc.com 


GLOSSARY
lidar
An acronym of light detection and ranging, describing systems that use a light beam in place of conventional microwave beams for atmospheric monitoring, tracking and detection functions. Ladar, an acronym of laser detection and ranging, uses laser light for detection of speed, altitude, direction and range; it is often called laser radar.
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