| 摘 要： | According to the latest journal citation reports （JCR） in 2009 from Information Sciences Institute of USA, the impact factor of Chinese Optics Letters （COL） in 2009 is 0.804 which ranks 39 in all of the 70 optical journals included by SCI （total cites J rank 36）, ranks 2 in all optical journals of Asia included by SCI （total cites rank 1）, and ranks in the top 40% of all the Chinese journals included by SCI. COL was established in 2003 and included by SCI in 2007. Based on the calculation formula of the JCR, the impact factor of COL and other relevant data are first announced by the JCR starting from 2009.
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