An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Kehl F, Follonier S.Kehl F, et al. Among authors: follonier s.Opt Lett. 2016 Apr 1;41(7):1447-50. doi: 10.1364/OL.41.001447.Opt Lett. 2016.PMID: 27192258