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Optical Engineering

Printed circuit board based modulated retroreflector using three large-area quantum well modulators
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Paper Abstract

We demonstrate a modulated retroreflector that utilizes large-area multiple quantum well modulators on all three faces of a retroreflector. The large-area devices, fabricated by metalorganic chemical vapor deposition, are characterized in terms of the yield and leakage currents. A yield higher than that achieved previously using devices fabricated by molecular beam epitaxy is observed. The retroreflector module is constructed using a standard FR4 printed circuit board (PCB) technology, thereby simplifying the wiring issue. A high optical contrast ratio of 8.23 dB is observed for a drive of 20 V. A free-standing PCB retroreflector is explored and found to have insufficient angular tolerances (±0.5 deg). We show that the angular errors in the corner-cube construction can be corrected for using off-the-shelf optical components as opposed to mounting the PCBs on a precision corner cube, as has been done previously.

Paper Details

Date Published: 1 October 2009
PDF: 7 pages
Opt. Eng. 48(10) 105401 doi: 10.1117/1.3249750
Published in: Optical Engineering Volume 48, Issue 10
Show Author Affiliations
Rohit Nair, Univ. of Delaware (United States)
Michael Edward Teitelbaum, Univ. of Delaware (United States)
Keith W. Goossen, Univ. of Delaware (United States)


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