Improvement of optical signal-to-noise ratio of a high-power pump by stimulated Brillouin scattering in an optical fiber

We propose and demonstrate improvement of optical signal-to-noise ratio of a highpower pump by saturated stimulated Brillouin amplification of a backward seed in a fiber. A 27-dB improvement was obtained for a 1-W pump

Investigation of gain ripple in two-pump fiber optical parametric amplifiers

International audienceBy using the four-sideband theory, we analyze the gain spectrum in wideband two-pump fiber optical parametric amplifiers and predict gain ripples over the flat gain region. We derive an approximation of their pseudo-periods and discuss methods for reducing their amplitude

Experimental study of all-optical gain-clamped fiber optical parametric amplifier

We report an experimental investigation of all-optical gain clamping in a fiber optical parametric amplifier. Signal gain variation was reduced to less than 0.5 dB when the signal input power varied from -25 to -5 dBm. Gain saturation effects were reduced, and we also observed reduction of cross-gain modulation to below 0.5 dB. Power penalties for a 3-Gb/s on-off keying signal were reduced from 2.5 to 0.5 dB

1-Tb/s DWDM long-haul transmission employing a fiber optical parametric amplifier

In this letter, we report the performance of a fiber optical parametric amplifier (OPA) when used as a source or intermediate node amplifier in a dense wavelength-division-multiplexed (DWDM) long-haul transmission testbed with 26 DWDM channels modulated at 43.7-Gb/s return-to-zero differential phase-shift keying. In both scenarios, we demonstrate similar performance to an erbium-doped fiber amplifier. This shows the OPAs compatibility with high-capacity (>1 Tb/s) long-haul communication systems