Spread-Spectrum Secure Optical Communications

In response to the solicitation to develop a Multiband Laser Communication system for space based communications, Q-Peak, Inc. proposes to develop a laser transmitter technology that has significant implications on physical layer security, as well as an impact on the networks architecture. Specifically, we propose to analyze and demonstrate a transmitter using an ultrafast pulse and encode the data stream at various points within the pulse spectrum. This approach will allow frequency-hopping spread spectrum communications that provides protection against unauthorized interception or jamming of the data stream. This type of format will provide a substantial barrier to the nefarious user relative to a more conventional WDM system. Furthermore, the use of an ultrashort pulse is applicable for both multiple access and backbone parts of the free-space satellite network.