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

  • FEL Generates Second Harmonic

Photonics Spectra
Nov 2001
Researchers at the Thomas Jefferson National Accelerator Facility in Newport News, Va., have demonstrated second-harmonic lasing in the infrared with a superconducting free-electron laser (FEL). In a report that appeared in the Aug. 20 issue of Physical Review Letters, they described how they produced an average of 4.5 W of 2.925-µm light with the system set to lase at 6 µm.

Typically, gain exists in a free-electron laser only at odd harmonics because of the symmetry in the system, so the researchers used an antisymmetric resonator mode and misalignment of the injected electrons with the optical axis. The preferred lasing mode of the system at the second harmonic was TEM01, which they attributed to the favoring of modes with no on-axis gain.

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!