There are two main types of optical amplifiers, semiconductor amplifiers and optical fiber amplifiers. Semiconductor amplifiers are divided into resonant and traveling wave types; fiber amplifiers are divided into rare earth-doped fiber amplifiers and nonlinear optical amplifiers. Nonlinear optical amplifiers are divided into Raman (SRA) and Brillouin (SBA) fiber amplifiers. Generally refers to traveling wave optical amplifier, the working principle is similar to that of semiconductor laser. Its operating bandwidth is very wide. However, the gain amplitude is slightly smaller and manufacturing is more difficult. Although this kind of optical amplifier is already practical, its output is very small.
In a WDM optical transmission system that uses an optical amplifier in its transmission path, a monitoring signal channel is used to monitor and control the operation of the amplifier and perform spectral separation from the data transmission, which can be multiplexed with the data . Disclosed is an amplifier structure that can be upgraded as the transmission system is upgraded to increase data processing capabilities, such as increasing data transmission within the band and/or in the reverse direction, without having to disconnect data transmission through the amplifier to be upgraded. path. This structure is implemented using channel drop and add filters configured to extend the amplified data transmission path through the drop/add channels of these filters.
Application date: June 6, 2000
Publication date: April 25, 2001
Authorization announcement date: December 31, 2003< /p>
Applicant/Patentee: Notaire Networks Inc.
Applicant Address: Quebec, Canada
Inventor and Designer: Kevin P. Jones; Luo Jay M. Gibb;Robert A. Baker;Martin P. Pietek;Mark E. Bray;Barry Brintai;James Regan;Toby J. Reid;Allan A. Solheim; Robert W. Keith; Mark R. Hines; Joseph Mang; Nigel E. Jolly; Aaron Robinson; Jonathan P. King; Simon P. Parry
Patent agency: China Council for the Promotion of International Trade Patent and Trademark Office
Agent: Jiang Shixun
Patent type: Invention patent
< p>Classification number: G02F1/39