A broadband source (1520-1620nm) with output power of more than 200mW is achieved using only a single-wavelength pumping scheme dependent on the combined effects of stimulated Raman scattering, parametric process, and Erbium-doped fiber amplification.
In this letter, a S-band discrete Raman fiber amplifier(RFA) with the maximum net gain of 18.3dB was obtained. Using the gain flattening filter based on a cascaded long-period fiber grating (LPFG), the gain profile of this RFA was flattened to within ±1dB in the wavelength range from 1 480 nm to 1 515 nm, and an average gain of 11.3dB was achieved.
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