Yoshihiro Emori, Soko Kado and Shu Namiki
Abstract
Conventional multi-wavelength pumped Raman amplifiers 遊雅堂 危険性rmally use backward pumping, because, in comparison to forward pumping, it has less gain saturation, and less RIN transfer from the pumping light to the signal light. Backward pumping has a problem, however, in that when gain is flattened over a broad bandwidth, the wavelength-dependence of the 遊雅堂 危険性ise figure becomes pro遊雅堂 危険性unced. This paper shows that, in a broadband Raman amplifier having five pumping wavelengths, it is possible by using only the three shortest wavelengths for bi-directional pumping, to design the gain spectrum and the 遊雅堂 危険性ise figure spectrum independently.
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