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.
Iyer S, Popov S, Friberg AT.Iyer S, et al. Among authors: friberg at.Opt Lett. 2012 Jun 1;37(11):2043-5. doi: 10.1364/OL.37.002043.Opt Lett. 2012.PMID: 22660115
Thaning A, Friberg AT, Popov SY, Jaroszewicz Z.Thaning A, et al. Among authors: friberg at.J Opt Soc Am A Opt Image Sci Vis. 2002 Mar;19(3):491-6. doi: 10.1364/josaa.19.000491.J Opt Soc Am A Opt Image Sci Vis. 2002.PMID: 11876312