Inversion level controller and system for optical amplifiers

Details Inversion level controller and system for optical amplifiers Inversion level controller and system for optical amplifiers

2005-05-31

2005-05-31

Tarcza, Thomas H. (Department: 3663)

Optical: systems and elements

Optical amplifier

Optical fiber

C359S337120

Reexamination Certificate

active

06900934

ABSTRACT:
A control system and method for a multi-channel optical amplifier is provided that achieves and automatically maintains a selected gain level by controlling the average inversion level of the dopant atoms in the gain fiber. In both the system and the method, a set point average inversion level that corresponds to a gain set point is first selected. A pump light power output necessary to achieve the set point average inversion level is determined from the optical input power, output power, and pump light remnant power. The same parameters used to achieve and maintain the set point average inversion level are also used to determine linear gain per channel which in turn may be used to minimize tilt or ripple in the gain output of the amplifier.

REFERENCES:
patent: 5923462 (1999-07-01), van der Plaats
patent: 6016218 (2000-01-01), Jo et al.
patent: 6366393 (2002-04-01), Feulner et al.
patent: 6381560 (2002-04-01), Shah et al.
patent: 6687049 (2004-02-01), Sulhoff et al.
Sun, Y., Zyskind, J.L., Srivastava, A.K., “Average Inversion Level, Modeling, and Physics of Erbium-Doped Fiber Amplifiers” IEEE Journal of Selected Topics in Quantum Electronics, vol. 3, No. 4, Aug. 1997, p. 991-1007.

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