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本发明提供一种光学放大器和一种光学放大方法,该光学放大器是通过将两根掺稀土的光纤串联起来的办法对输入光进行放大的。两根掺稀土光纤之间安
The present invention provides an optical amplifier and an optical amplification method of amplifying input light by connecting two rare earth-doped optical fibers in series. Between two rare earth doped fiber security