1 February 2014 Flat amplification over C-band by quasi phase-matched fiber optical parametric amplifier using pump-phase shifers
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Abstract
We review recent progresses of quasi phase-matched (QPM) single-pumped fiber optical parametric amplifiers (FOPA) as a candidate for low noise amplifiers. We show how the QPM operation is realized in the gain fiber where highly nonlinear fibers and pump-phase shifters are alternately concatenated. Then, we show that the QPM operation makes gain of the FOPA flat. Finally, we demonstrate that the QPM-FOPA has noise figure less than 4.5 dB, which is lower than that of conventional EDFAs, and gain more than 20 dB with 1-dB gain bandwidth of 38 nm which covers C-band.
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Shigehiro Takasaka, Shigehiro Takasaka, } "Flat amplification over C-band by quasi phase-matched fiber optical parametric amplifier using pump-phase shifers", Proc. SPIE 9008, Optical Metro Networks and Short-Haul Systems VI, 90080L (1 February 2014); doi: 10.1117/12.2038783; https://doi.org/10.1117/12.2038783
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