All-weather long-wavelength infrared free-space optical communications

Donald P. Hutchinson; Roger K. Richards; John T. Simpson; Marc L. Simpson

doi:10.1117/12.450643

9 December 2002 All-weather long-wavelength infrared free-space optical communications

Donald P. Hutchinson, Roger K. Richards, John T. Simpson, Marc L. Simpson

Proceedings Volume 4821, Free-Space Laser Communication and Laser Imaging II; (2002) https://doi.org/10.1117/12.450643
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

Abstract

ORNL is developing a high-speed, full-duplex all weather communications link for ranges up to 5 kilometers. To accomplish this project, we have constructed an RF-driven waveguide CO₂ laser and a dielectric-waveguide Stark modulator. The 10-micron wavelength was selected for its ability to penetrate smoke, fog, and rain. The modulator is based on the Stark shift of NH₂D (deuterated ammonia). The laser is driven by a 60 MHz RF amplifier at a power level of approximately 50 watts. The resonator cavity of the laser is formed by a 2.4 mm internal diameter ceramic waveguide with external optics. The RF electrodes are formed from aluminum heatsink extrusions that also provide cooling for the discharge. Details of the laser design will be presented.

Citation Download Citation

Donald P. Hutchinson, Roger K. Richards, John T. Simpson, and Marc L. Simpson "All-weather long-wavelength infrared free-space optical communications", Proc. SPIE 4821, Free-Space Laser Communication and Laser Imaging II, (9 December 2002); https://doi.org/10.1117/12.450643

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