Accession Number:

AD0915934

Title:

1.06 Micron Sensor Array for Track and Receive.

Descriptive Note:

Final rept. Feb 72-Dec 73,

Corporate Author:

ROCKWELL INTERNATIONAL CORP THOUSAND OAKS CALIF SCIENCE CENTER

Personal Author(s):

Report Date:

1973-12-01

Pagination or Media Count:

92.0

Abstract:

The development of a 12-element array of inverted heterojunction III-V alloy microwave avalanche photodiodes for use for data detection and tracking in a 10 to the 9th power bitsecond satellite-to-satellite 10.06 micron laser communications system is reported. The three arrays delivered under the terms of this contract have quantum efficiencies constant from dc to microwave of about 95 at the 1.064 Nd-YAG laser line, narrow band photoresponse characteristics 750A FWHM, extremely low capacitance 0.3pfinner quadrant element, very short transit times 100ps, and low leakage currents. Microwave avalanche gains up to 15db were measured on these arrays, with all of this gain available before the onset of excess detector noise. By virtue of their high quantum efficiencies, even with their present gain levels and off-the-shelf 50 OHM preamps these devices should considerably outperform any other available 1.06 micron detector for gigabit data reception however, this effort did not include performance measurements in a communications system. With an optimized preamplifier design, data reception with under 1000 photonsbit at the detector should be possible, or even less as higher gains are achieved with these devices. Author

Subject Categories:

  • Lasers and Masers
  • Infrared Detection and Detectors
  • Solid State Physics
  • Unmanned Spacecraft
  • Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE