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    • 3. 发明专利
    • Optical fiber amplifier and optical fiber amplifier for bidirectional optical transmission employing it
    • 用于双向光学传输的光纤放大器和光纤放大器
    • JPH11274625A
    • 1999-10-08
    • JP7062898
    • 1998-03-19
    • Nec Corp日本電気株式会社
    • YOKOYAMA JUN
    • G02B6/00H01S3/06H01S3/067H01S3/07H01S3/10H01S3/23H04B10/00H04B10/27H04B10/29H04B10/297H04B10/02H04B10/16H04B10/17H04B10/24
    • H04B10/2972H01S3/0078H01S3/06787H01S3/09415H01S3/10023H01S3/2333H04B10/2912
    • PROBLEM TO BE SOLVED: To reduce the size by providing means for inputting/outputting a signal light and an amplified signal light at one end of an optical amplifying medium having the other end arranged with an exciting light source, and entering a signal light to the optical amplifying medium through an optical filter transmitting only an exciting light from the other end and reflecting the signal light thereby eliminating a conventional optical multiplexer. SOLUTION: A signal light enters from the optical I/O terminal 1 of an optical circulator 101 into an erbium added optical fiber 103 connected with an optical I/O terminal 2. An exciting light from an exciting light source 107 transmits through a grating fiber 105 and enters into the erbium added optical fiber 103 thus amplifying the signal light optically. The signal light is reflected on a grating fiber 10 to pass through the erbium added optical fiber 103 again and to enter into the optical I/O terminal 2 of the optical circulator 101 thus outputting an amplified signal light from an optical I/O terminal 3. This arrangement eliminates the need of optical multiplexer.
    • 要解决的问题:为了减小尺寸,通过提供用于输入/输出信号光的装置和放大的信号光,该光放大介质的一端具有布置有激发光源的另一端,并将信号光输入到 光放大介质通过仅从另一端传输激发光的光滤波器反射信号光,从而消除传统的光复用器。 解决方案:信号光从光环行器101的光I / O端子1进入与光I / O端子2连接的添加铒的光纤103.来自激发光源107的激发光透过光栅纤维 105并进入添加铒的光纤103,从而光学地放大信号光。 信号光在光栅纤维10上反射,再次通过添加铒的光纤103,并进入光环行器101的光I / O端子2,从而输出来自光I / O端子3的放大信号光 这种布置消除了光复用器的需要。