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IEEE Photonics Technology Letters > 2008 > 20 > 21 > 1769 - 1771
Electronics Letters > 1992 > 28 > 13 > 1188 - 1190
IEEE Photonics Technology Letters > 2008 > 20 > 21 > 1769 - 1771
Electronics Letters > 1992 > 28 > 13 > 1188 - 1190