1 October 2009 Printed circuit board based modulated retroreflector using three large-area quantum well modulators
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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.
© (2009) Society of Photo-Optical Instrumentation Engineers (SPIE)
Rohit Nair, Rohit Nair, Michael Edward Teitelbaum, Michael Edward Teitelbaum, Keith W. Goossen, Keith W. Goossen, } "Printed circuit board based modulated retroreflector using three large-area quantum well modulators," Optical Engineering 48(10), 105401 (1 October 2009). https://doi.org/10.1117/1.3249750 . Submission:
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