Patent ID: 6175444
Filing Date: 2001-01-16
Classification: H01S,H04B

Abstract:
A bi-directional optical amplifier, comprising:an optical circulator, including four ports, a first to fourth ports, for outputting entered lights one after another to each adjacent port;a first optical amplification fiber, connected to the first port, for optically amplifying the entered signal light with the help of a pumping light;a first pumping light source for outputting a first pumping light;a first wave-length selection/reflection means for selectively reflecting a specific wave-length of a first signal light;a first optically coupling means, connected to the second port, for receiving the first signal light output from the second port, coupling the first pumping light with the first signal light reflected by the first wave-length selection/reflection means, and outputting the first signal light and the first pumping light to the second port;a second optical amplification fiber, connected to the third port adjacent to the second port, for optically amplifying an entered signal light with the help of the pumping light;a second pumping light source for outputting a second pumping light;a second wave-length selection/reflection means for selectively reflecting a specific wave-length of a second signal light; anda second optically coupling means, connected to the fourth port, for receiving the second signal light output from the fourth port, coupling the second pumping light with the second signal light reflected by the second wave-length selection/reflection means; and outputting the second signal light and the second pumping light to the fourth port.