1. Present prospect of graded-index plastic optical fiber in telecommunication;Nihei;IEICE Trans. Electron.,1997
2. Bandwidth and transmission distance achieved by POF;Koike;IEICE Trans. Electron.,1999
3. W.T. Welford, R. Winston, The Optics of Non-imaging Concentrators, Academic Press, San Diego, 1978.
4. Comment—the CPC concept–theory and practice;Tabor;Solar Energy,1984
5. W.T. Welford, R. Winston, High Collection Nonimaging Optics, Academic Press, San Diego, 1989 (Chapter 4).