Optical component, optical amplification module, and optical...

Optical: systems and elements – Optical amplifier – Correction of deleterious effects

Reexamination Certificate

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C385S027000

Reexamination Certificate

active

07027215

ABSTRACT:
The present invention relates to an optical component and others in structure capable of implementing improved compensation for a gain slope. The optical component is equipped with first and second Mach-Zehnder interferometers. The first Mach-Zehnder interferometer is provided with a first temperature controller for controlling a temperature of at least one of a part of an optical main path and a first optical side path, while the second Mach-Zehnder interferometer42is also provided with a second temperature controller for controlling a temperature of at least one of a part of the optical main path and a second optical side path. A filter circuit having a wavelength-dependent insertion loss is disposed between the first and second Mach-Zehnder interferometers, and a controller controls the temperatures of the optical paths by use of the first and second temperature controllers on the basis of the insertion loss of the filter circuit, thereby setting a loss for light of a predetermined wavelength propagating between a light input end and a light output end.

REFERENCES:
patent: 5596661 (1997-01-01), Henry et al.
patent: 6160627 (2000-12-01), Ahn et al.
patent: 6633698 (2003-10-01), Hatayama et al.
patent: 6823094 (2004-11-01), Goh et al.
patent: 001072937 (2001-01-01), None
patent: WO 01/05005 (2001-01-01), None
K. Inoue, et al., “Tunable Gain Equalization Using a Mach-Zehnder Optical Filter in Multistage Fiber Amplifiers,” IEEE Photonics Technology Letters, vol. 3, No. 8, pp. 718-720 (1991).
H. Toba, et al., “Demonstration of Optical FDM Based Self-Healing Ring Network Employing Arrayed-Waveguide-Grating ADM Filters and EDFAs,” Proceedings of ECOC '94, pp. 263-266 (1994).
M. Fukutoku, et al., OAA1996, Tech. Dig, FA4.

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