Wavelength Diversity based Low Probability to Intercept (LPI) Free-Space Optical Communications in Strong Turbulence Regime

Case ID:

This technology uses an encoded broadband source on two different center wavelengths on different balanced detectors simultaneously to provide low probability for intercept communications for Free Space Optical communications and defense applications. Experimental results demonstrated success using wavelength diversity together with LDPC coded modulation to deal with strong atmospheric turbulence effects. This technology represents a low-cost solution to deal with atmospheric turbulence effects compared to high-cost adaptive optics.

The field of free-space optical (FSO) communication is at the forefront of the latest trends in communication systems, particularly for defense applications. However, FSO communication is full of challenges with major obstacles originating from the atmospheric turbulence effects. Adaptive optics (AO) techniques can be used to mitigate these obstacles, but a major drawback is that the devices used in AO (such as deformable mirrors and wavefront sensors) are primarily made for astronomical observation usage, have limited performance in strong turbulence, and are expensive. 


  • Military defense
  • Aerospace and satellite communication
  • Banking, financial services and insurance
  • Mobile telecommunications
  • Healthcare services
  • Disaster recovery
  • Internet services
  • Internet of things connectivity


  • Cost effective
  • Low probability to intercept communication
  • Better performance in strong atmospheric turbulence
  • Demonstrated research results
Patent Information:
Contact For More Information:
Tariq Ahmed
Sr Licensing Manager, College of Engineering
The University of Arizona
Lead Inventor(s):
Ivan Djordjevic
Vijay Nafria