Cordina et al., “Ultra Low noise long wavelength EDFA with 3.6 db external noise figure”, OFC '99, Feb. 21-26, 1999, pp. 13-15.* |
Lee et al., “Enhancement of Power Conversion Efficiency for an L-band EDFA with a Secondary Pumping Effect in the Unpumped EDF Section”, IEEE Photonics Technology Letters, vol. 11, No. 1, Jan. 1999, pp. 42-44.* |
Kean et al., “Pump induced inhomogeneity of gain spectra in conventional and extended-band EDFAs”, OFC'99, Feb. 21-26, 1999, pp. 10-12.* |
Ono et al., “Gain-Flattened Er3+ Doped Filter Amplifier for a WDM Signal in the 1.57-1.60 micrometer Wavelength region”, IEEE Photonics Technology Letters, vol. 9, No. 5, May 1997.* |
Wysocki et al., “Broad-Band Erbium-Doped Fiber Amplifier Flattened Beyond 40 nm Using Long-Period Grating Filter”, IEEE Photonics Technology Letters, vol. 9, No. 10, Oct. 1997.* |
Espindola, R.P. et al., Low noise, high gain, high conversion efficiency L-band EDFA, Technical Digest of the 10th Optical Amplifier and Their Application, Nara, Japan (1999). |