| 摘要 |
PURPOSE: To provide an optical amplifier capable of more faithfully amplifying a signal beam compared with a usual example and inducing excitation light from a high output excitation light source to a core of a smaller size. CONSTITUTION: An optical isolator 11 transmits the signal beam in one direction, and outputs it to a second optical fiber cable 102 through a first optical fiber cable 101, and on the other hand, the excitation light generated by the excitation light source 16 is transmitted to be outputted through a third fiber cable 24 having tapered core and cladding converting from a larger pore size to a smaller pore size connected to the excitation light source 16. A multiplexer 15 reflects the incident excitation light, and excites the signal beam by making it incident on the second optical fiber cable 102, and passes through the signal beam amplified by inductive emission in the second optical fiber cable 102 by excitation. The optical isolator 12 transmits and outputs the signal beam outputted from the multiplexer 15 in one direction. |
