Search Menu
Photonics Media Photonics Buyers' Guide Photonics EDU Photonics Spectra BioPhotonics EuroPhotonics Industrial Photonics Photonics Showcase Photonics ProdSpec Photonics Handbook
More News
Email Facebook Twitter Google+ LinkedIn Comments

  • Optical Downlink Proposed for Space Probe

Photonics Spectra
Dec 2002
Scientists at Johns Hopkins UniversityApplied Physics Laboratory in Laurel, Md., and at the National Institute of Standards and Technology (NIST) in Gaithersburg, Md., have proposed an optical system that would enable spacecraft 1000 astronomical units away to communicate with Earth. They estimate that technological advancements within the next five to 10 years could make such a system a reality.

The distances and velocities associated with an interstellar space probe suggest that an optical downlink is the most feasible approach for the presumed mass and power budget. Higher-power laser diodes and/or diode-pumped fiber lasers with spatially tight and temporally stable outputs will have to be developed to construct such a system, which would employ a microelectromechanical beam-steering mechanism developed at NIST to offer a pointing accuracy of 400 nrad rms.

Terms & Conditions Privacy Policy About Us Contact Us
back to top

Facebook Twitter Instagram LinkedIn YouTube RSS
©2016 Photonics Media
x Subscribe to Photonics Spectra magazine - FREE!