Lens design and verification used for terahertz space transmission
Author:
Affiliation:

Key Laboratory of Space Active Opto-Electronics Technology,Shanghai Institute of Technical Physics,Chinese Academy of Sciences,Yu Tian Road No ,Shanghai,PR China,Shanghai Institute of Technical Physics,Shanghai Institute of Technical Physics

Clc Number:

Fund Project:

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
  • |
  • Comments
    Abstract:

    Terahertz beams are a kind of Gaussian beam with a big divergence angle and its wave front cannot be simplified to a plane or a spherical wave. All the theoretical derivations from the classical electromagnetic theory and ABCD laws support the following conclusions: firstly, a positive lens converges the terahertz beam in front of the focal plane instead of on the focal plane; secondly, a negative lens which matches the radius of the Gaussian beam’s wave front is more appropriate for terahertz beam collimation. Experiments show that a negative lens with f′=-188 mm at the matching position, z=100 mm, can improve the terahertz beam collimation from 6° to 0.1°. And 20-m terahertz space transmission was realized with a very simple optical scheme.

    Reference
    Related
    Cited by
Get Citation

YANG Qiu-Jie, HE Zhi-Ping, SHU Rong. Lens design and verification used for terahertz space transmission[J]. Journal of Infrared and Millimeter Waves,2017,36(5):519~525

Copy
Share
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:December 22,2016
  • Revised:April 09,2017
  • Adopted:April 12,2017
  • Online: November 29,2017
  • Published: