Granted Patent
Utility
US 6,441,952 · App. 09/898,244
Apparatus and method for channel monitoring in a hybrid distributed Raman/EDFA optical amplifier
Inventors:
Xiaodong Duan, Guohua Xiao, Lintao Zhang, Dongqi Liu, Gang Li, Paul Hull, Charles Mao, Simon Cao
Patented Case
View Patent ↗
Granted: Aug 27, 2002
Filed: Jul 3, 2001
Inventors
Xiaodong Duan
Guohua Xiao
Lintao Zhang
Dongqi Liu
Gang Li
Paul Hull
Charles Mao
Simon Cao
Assignee (at issue)
Avanex Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.