H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 10/17 (2006.01) H01S 3/10 (2006.01) H04B 10/24 (2006.01) H01S 3/23 (2006.01)
Patent
CA 2264421
An optical fiber amplifier comprises a pump light source outputting pump light and an optical amplification medium in which signal light is amplified by pump light. The signal light is input to, and output from, one end of the optical amplification medium. Between the other end of the optical amplification medium and the pump light source is provided an optical filter selectively transmitting the pump light and selectively reflecting light with a wavelength bandwidth equal to that of the signal light. Two optical fiber amplifiers, joined by a 4-terminal fully-circulating optical circulator, are provided to amplify up signal light and down signal light. The up signal light is input into, and amplified down signal light is output from, a first optical I/O terminal. The down signal light is input into, and amplified up signal light is output from, a third optical I/O terminal. A second optical I/O terminal and a fourth optical I/O terminal are connected to one end of the first optical amplification medium and the second optical amplification medium, respectively. The signal light and the amplified signal light are thus input into, and output from, the optical fiber amplifier. A fiber bragg grating may be used as the optical filter. Thus, the optical amplification device for bi-directional light transmission may be reduced in size.
Corporation Nec
Smart & Biggar
LandOfFree
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