Optical amplifier, excitation light source control method for use in optical amplifier, and optical amplifier control method
An optical amplifier and excitation light source technology, applied in lasers, laser parts, optical multiplexing systems, etc., can solve the problems of unstable excitation light source control, unstable excitation light source control, etc., and achieve the effect of stable installation or removal
Inactive Publication Date: 2007-05-16
FUJITSU LTD
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Problems solved by technology
[0009] However, if additional excitation sources are introduced into the control loop of existing excitation sources, the control of these excitation sources tends to become unstable
Specifically, assuming that the amount of excitation light (excitation light power) required by the optical amplifier to obtain a predetermined gain is P, the difficulty encountered is to uniquely determine the combined total of the excitation light power of these two excitation light sources as P, and there will be Multiple operating points, resulting in unstable excitation source control
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[0034] (a) Description of the principles of the invention
[0035] This description begins with the principles of the invention.
[0036] Fig. 1 is a block diagram, represents according to the structural principle of optical amplifier of the present invention; Optical amplifier 1 shown in Fig. 1 comprises: optical amplification part 2, is used to amplify and output the signal light of input; A plurality of excitation light sources (main excitation light source 3 And auxiliary excitation light source 4), each excitation light source provides excitation light to the light amplification part 2; and excitation light source control part 5.
[0037] The main excitation light source 3 is designed such that the output amount of excitation light it supplies to the optical amplification section 2 is controlled by the excitation light source control section 5 .
[0038] In addition, the auxiliary excitation light source 4 is designed such that the excitation light output it provides to ...
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An optical amplifier to be used in a multiplexed wavelength optical communication system, for example, comprising, in order to add / remove an excitation light source stably according to the increase / decrease in the number of channels of a signal light even during the operation of the optical communication system; an optical amplifier (2) for amplifying and outputting an input signal light; a plurality of excitation light sources (3, 4); and an excitation light source control unit (5) for controlling the operations of said excitation light sources (3, 4), wherein said excitation light sources include a main excitation light source (3) and an auxiliary excitation light source (4), and wherein the excitation light source control unit (5) includes a control unit (7) for controlling the main excitation light source (3) to feed the excitation light, when the number of channels of the input signal light is no more than a predetermined number of channels and for controlling said main excitation light source (3) and said auxiliary excitation light source (4) to cooperate with each other to feed the excitation light, when the number of channels of said signal light is larger than a predetermined number of channels.
Description
[0001] This application is a divisional application of a patent application with the application number 98804820.5, the filing date being June 5, 1998, and the title of the invention being "optical amplifier, excitation light source control method used in optical amplifier, and optical amplifier control method". technical field [0002] The present invention relates to an optical amplifier, a method of controlling an excitation light source in an optical amplifier, and a method of controlling an optical amplifier, for example, applicable to a wavelength multiplexing system in which the number of channels in signal light is increased or decreased during operation of the system (signal light multiplexed wavelengths). Background technique [0003] In recent years, research and development of wavelength multiplexing optical communication systems have been active, and such a system has been developed that can increase the number of channels in signal light according to communicati...
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IPC IPC(8): H04B10/12H04B10/16H04B10/25H01S3/094H04B10/032H04B10/077H04B10/079H04B10/2525H04B10/29H04B10/296H04B10/297H04J14/02
CPCH04B10/291H04B10/294H01S3/094003H04J14/0221H04B10/296H04J14/02216
Inventor 木下进近间辉美
Owner FUJITSU LTD