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.
Kong L, Ji M, Holtom GR, Fu D, Freudiger CW, Xie XS.Kong L, et al. Among authors: fu d.Opt Lett. 2013 Jan 15;38(2):145-7. doi: 10.1364/OL.38.000145.Opt Lett. 2013.PMID: 23454943Free PMC article.
Lefrancois S, Fu D, Holtom GR, Kong L, Wadsworth WJ, Schneider P, Herda R, Zach A, Sunney Xie X, Wise FW.Lefrancois S, et al. Among authors: fu d.Opt Lett. 2012 May 15;37(10):1652-4. doi: 10.1364/OL.37.001652.Opt Lett. 2012.PMID: 22627526Free PMC article.
Lu FK, Ji M, Fu D, Ni X, Freudiger CW, Holtom G, Xie XS.Lu FK, et al. Among authors: fu d.Mol Phys. 2012 Aug;110(15-16):1927-1932. doi: 10.1080/00268976.2012.695028. Epub 2012 Jun 14.Mol Phys. 2012.PMID: 23504195Free PMC article.