Optical: systems and elements – Optical amplifier – Optical fiber
Patent
1993-05-03
1994-09-06
Hellner, Mark
Optical: systems and elements
Optical amplifier
Optical fiber
359160, H01S 330
Patent
active
053453328
ABSTRACT:
In a multiwavelength lightwave communications system channel-by-channel power regulation is achieved with a cascade of inhomogeneously broadened saturated fiber amplifiers spaced along the optical fiber transmission path. In the described embodiment, inhomogeneous broadening is achieved by immersing each of the erbiumdoped fiber amplifiers in the cascade in a bath of liquid nitrogen, thereby cooling each amplifier to approximately 77 K.
REFERENCES:
patent: 5239607 (1993-08-01), Da Silva et al.
patent: 5245467 (1993-09-01), Grasso et al.
patent: 5260823 (1993-11-01), Payne et al.
"Modeling Erbium-Doped Fiber Amplifiers", C. R. Giles, E. Desurvine, Journal of Lightwave Technology, vol. 9, No. 2, pp. 271-283, Feb. 1991.
"Equalization in Amplified WDM Lightwave Transmission Systems", A. Chraplyvy, J. Nagel R. Tkach, IEEE Photon. Technol. Lett., vol. 4, No. 8, pp. 920-922, Aug. 1992.
"Tunable Gain Equalization Using a Mach-Zehnder Optical Filter in Multistage Fiber Amplifiers", K. Inoue, T. Kominato, H. Toba, IEEE Photon. Technol. Lett., vol. 3, No. 8, pp. 718-720, Aug. 1991.
"Gain Equalization in Multiwavelength Lightwave Systems Using Acoustooptic Tunable Filters", S. Su, R. olshansky, G. Joyce, D. Smith, J. Baran, IEEE Photon. Technol. Lett., vol. 4, No. 3, pp.269-271, Mar. 1992.
daSilva Valeria L.
Eskildsen Lars E.
Goldstein Evan L.
Silberberg Yaron
Bell Communications Research Inc.
Gurey Stephen M.
Hellner Mark
Suchyta Leonard Charles
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