Sumitomo Electric Industries, Ltd. (SEI) filed a patent infringement lawsuit in Delaware Federal Court against Furukawa Electric Co., Ltd. and two of its U.S. subsidiaries, Furukawa Electric North America, Inc. and FITEL Technologies, Inc. SEI, a developer and manufacturer of fiber optic systems and components, said in its complaint that Furukawa's "Rainbow Pump" semiconductor pump laser module products infringe SEI's U.S. Patent.
SEI's patent, entitled "Semiconductor Laser Module and Optical Amplifier" describes a critical advance in the area of semiconductor pump laser with Fiber-Bragg-Grating stabilization. The patent describes a semiconductor laser module providing an extremely stable power and wavelength with a help of Fiber-Bragg-Grating used in conjunction with an optical fiber amplifier resulting in superior fiber optic data transmission. This technology enables high channel count DWDM (Dense Wavelength Division Multiplexing) amplification as well as the forthcoming Raman Amplification.
Furukawa is currently marketing in the U.S. a wavelength-stabilized semiconductor laser module under the trade name "Rainbow Pump" which incorporates the patented technology.
About SEI:
SEI is a manufacturer of electric and fiber optic wire and cable.