Proceedings of SPIE - the International Society for Optical Engineering
Free-space optical links are ideal for short-range (1 km to 3 km) communications. An innovative new technique called Spatial Optical Encryption can be used to secure laser data communications. With this technique, data can be encoded and transmitted spatially through a single fiber, and then transmitted over a free-space optical link. Different sources of data could be simultaneously sent over the same fiber. This endeavor demonstrates the design and performance issues of such a transmitter and receiver using Spatial Optical Encryption over an environmental link of 100 meters.
Murshid, S. H., Howard, W., Murshid, N. R., & Chakravarty, A. (2011). Free-space optical communication link using spatial optical encryption. Paper presented at the Proceedings of SPIE - the International Society for Optical Engineering, 8054 doi:10.1117/12.884386