Title:
METHOD AND DEVICE FOR CONTROLLING OPTICAL AMPLIFIER WHICH OPTICALLY AMPLIFIES WAVELENGTH MULTIPLEXED SIGNAL
Document Type and Number:
Japanese Patent JP3939322
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method and a device for controlling the difference of gain between optical signals in an optical amplifier comprising a rare earth doped fiber optically amplifying a wavelength multiplexing signal, and that for controlling output of individual optical signal.
SOLUTION: An exciting light from a light source 14 is made incident to an erbium-doped fiber 12, together with a control light, having a wavelength in the wavelength region in which the erbium doped fiber 12 shows an optical amplification action, from a light source 40. The outputs of the signal lights are detected by photodetecters 24 and 26, respectively, and inlet power of the control light is controlled based thereon.
Inventors:
Yado Minami Nobufumi
Shinya Inagaki
Kenji Tagawa
Nobuhiro Fukushima
Shinya Inagaki
Kenji Tagawa
Nobuhiro Fukushima
Application Number:
JP2004280496A
Publication Date:
July 04, 2007
Filing Date:
September 27, 2004
Export Citation:
Assignee:
富士通株式会社
International Classes:
H01S3/10; H01S3/131; (IPC1-7): H01S3/131
Attorney, Agent or Firm:
Takashi Ishida
Shigeru Tsuchiya
Masaya Nishiyama
Shigeru Tsuchiya
Masaya Nishiyama