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Proceedings Paper

Tracking system by phase conjugation for laser energy transmission
Author(s): Christian A. Schäfer; Osamu Matoba; Nobuyuki Kaya
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Paper Abstract

We propose a new concept for a retro-directive tracking system applicable for communication and power transmission. In the proposed concept, the power transmitter utilizes a beacon emitted from the receiver to obtain information about its direction by conjugating its phase inside a nonlinear medium. Power is therefore transmitted back to the receiver by the phase conjugated beam. The power can be amplified by an array of phase conjugators which provides a large aperture so that the intensity can be increased on the receiver's photovoltaic panels compared to a single element. A system design provides the basic understanding of this setup and basic experiments are conducted with two Co-doped SrxBa1-xNb2O6 (Co:SBN) crystals. We confirm the occurrence of interference of two beams that are generated by four wave mixing from a divergent signal beam. In areas of constructive interference, we could observe a higher intensity than the single non-interfering beams provides.

Paper Details

Date Published: 14 February 2007
PDF: 10 pages
Proc. SPIE 6454, High Energy/Average Power Lasers and Intense Beam Applications, 64540A (14 February 2007); doi: 10.1117/12.700145
Show Author Affiliations
Christian A. Schäfer, Kobe Univ. (Japan)
Osamu Matoba, Kobe Univ. (Japan)
Nobuyuki Kaya, Kobe Univ. (Japan)


Published in SPIE Proceedings Vol. 6454:
High Energy/Average Power Lasers and Intense Beam Applications
Steven J. Davis; Michael C. Heaven; J. Thomas Schriempf, Editor(s)

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