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Proceedings Article

Tracking system by phase conjugation for laser energy transmission

[+] Author Affiliations
Christian A. Schäfer, Osamu Matoba, Nobuyuki Kaya

Kobe Univ. (Japan)

Proc. SPIE 6454, High Energy/Average Power Lasers and Intense Beam Applications, 64540A (February 14, 2007); doi:10.1117/12.700145
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From Conference Volume 6454

  • High Energy/Average Power Lasers and Intense Beam Applications
  • Steven J. Davis; Michael C. Heaven; J. Thomas Schriempf
  • San Jose, CA | January 20, 2007

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.

© (2007) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Christian A. Schäfer ; Osamu Matoba and Nobuyuki Kaya
"Tracking system by phase conjugation for laser energy transmission", Proc. SPIE 6454, High Energy/Average Power Lasers and Intense Beam Applications, 64540A (February 14, 2007); doi:10.1117/12.700145; http://dx.doi.org/10.1117/12.700145


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