| 摘要 |
An 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 fib er (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 sour ce (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 l 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. (Figure 9) |
