Optical amplifying elements and transmitting system


Application Number  00129099 Application Date  2000.09.29
Publication Number  1290084 Publication Date  2001.04.04
Priority Information   1999/9/29 EP 99119318.6  
International
Classification
 H04B10/12;H04J14/02  
Applicant(s) Name  Optical Technology American Corp.  
Address    
Inventor(s) Name  G. Olivedy;J. Rothe;W.G. Goosemory  
Patent Agency Code  11038 Patent Agent  jiang shixun
AbstractAn optical amplifying unit includes an input (101) for the input of optical signals, an output (102) for the output of the optical signals, a single-mode active fiber (103) codoped with Er and Yb, optically connected to the input and the output, and adapted to amplify the optical signals, a first pump source (104) for generating a first pump radiation including an excitation wavelength for Er, a second pump source (106) for generating a second pump radiation including an excitation wavelength for Yb, a first optical coupler (105) for optically coupling the first pump radiation into the core of the active fibre in a co-propagating direction with respect to signa direction, and a second optical coupler (107) for optically coupling the second pump radiation into the core of the active fiber in a counter-propagating direction with respect to signal direction.