Photovoltaically powered modulating retroreflectors

Robert J. Walters; James L. Murphy; William S. Rabinovich; G. Charmaine Gilbreath; David M. Wilt; Mark Smith; Michael J. Krasowski; Philip P. Jenkins; D. Scheiman; Jeffrey H. Warner; Scott R. Messenger; Justin R. Lorentzen; Geoffrey P. Summers

doi:10.1117/12.557299

20 October 2004 Photovoltaically powered modulating retroreflectors

Robert J. Walters, James L. Murphy, William S. Rabinovich, G. Charmaine Gilbreath, David M. Wilt, Mark Smith, Michael J. Krasowski, Philip P. Jenkins, D. Scheiman, Jeffrey H. Warner, Scott R. Messenger, Justin R. Lorentzen, Geoffrey P. Summers

Author Affiliations +

Proceedings Volume 5550, Free-Space Laser Communications IV; (2004) https://doi.org/10.1117/12.557299
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

The development of a photovoltaically (PV) powered, laser communication system that constitutes a miniature, highly energy-efficient wireless communication technology is described. The technology is based on the direct integration of a multi-quantum well (MQW) modulating retroreflector (MRR) optical communication node and a monolithically integrated module (MIM) PV power source. The MQW MRR optical data link exploits the shift in the MQW absorption peak under an applied reverse bias to modulate incident laser light enabling binary encoding of data for transfer. A MIM consists of many individual solar cells monolithically integrated on a single substrate and offers the design versatility necessary to allow efficient electrical conversion of both incident sunlight and the system laser-light and the ability to match the voltage output to the MRR requirements. A description of the development of the MRR and MIM components of the system along with the power management and distribution circuitry is given. Results of bench-top demonstrations of the operational system are presented.

Citation Download Citation

Robert J. Walters, James L. Murphy, William S. Rabinovich, G. Charmaine Gilbreath, David M. Wilt, Mark Smith, Michael J. Krasowski, Philip P. Jenkins, D. Scheiman, Jeffrey H. Warner, Scott R. Messenger, Justin R. Lorentzen, and Geoffrey P. Summers "Photovoltaically powered modulating retroreflectors", Proc. SPIE 5550, Free-Space Laser Communications IV, (20 October 2004); https://doi.org/10.1117/12.557299

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