Dual-function remotely-pumped Erbium-doped fiber amplifier: Loss and dispersion compensator

Abstract

An efficient Erbium-doped fiber amplifier configured in doublepass amplification scheme with chirped fiber Bragg grating as the reflector is presented in this paper. The proposed amplifier architecture is optimized and designed to work under consideration of low pump powers for remotely-pumped applications. The chirped fiber Bragg grating is used to reflect the amplified signal back to the Erbium-doped fiber and at the same time to compensate the effect of fiber dispersion. The proposed amplifier architecture is able to maintain gain of higher than 20 dB for small signals less than -23 dBm with 10 mW pump power only. The integrated function of loss and dispersion compensator in single black box is an attractive solution to be used as pre-amplifier.

Modeling, optimization, and experimental evaluation of remotely pumped double‐pass EDFA

“…Experimental work is carried out and reported in [4]. The EDF, which is used in the experiment has ϭ 440 ppm, A ϭ 19.8 ‫ء‬ 10 Ϫ12 m 2 , ⌫ S ϭ 0.40, ⌫ P ϭ 0.43, SA ( S ) ϭ 2.85 ‫ء‬ 10 Ϫ25 m 2 , SE ( S ) ϭ 4.03 ‫ء‬ 10 Ϫ25 m 2 , PA ( P ) ϭ 2.86 ‫ء‬ 10 Ϫ25 m 2 , PE( P ) ϭ 0.42 ‫ء‬ 10 ϯ25 m 2 and ϭ 0.01 s. The operating pump power of the DP EDFA is 10 mW from the 1480-nm pump source, length of the EDFA is 13.5 m, and operating signal power is varied from Ϫ40 to Ϫ10 dBm at 1550.3 signal wavelength.…”

“…None of these [1][2][3] reported the optimization of their design except experimental results. Recently, experimental optimization techniques of DP EDFA have been reported [4,5]. Pump power is optimized with respect to the optimum EDF length in [4].…”

“…Recently, experimental optimization techniques of DP EDFA have been reported [4,5]. Pump power is optimized with respect to the optimum EDF length in [4]. But optimum EDF length is dependent on the pump power.…”

Reducing ASE Effect in Coherent Detection by Employing Double-Pass Fiber Preamplifier and Time-Domain Filter

“…Compared to a single-pass amplifier, the double-pass has higher amplification efficiency, is more cost effective and is more flexible. In the small signal regime, considered in our work, experimental results in the existing literature have shown that the double-pass amplifier is clearly superior to the single-pass amplifier (see also [14], [15]). We use the rate equations derived in Desurvire's paper [18] to study the dynamic amplification for the double-pass configuration.…”

“…The variance of the ASE-ASE beating noise is given by (11) The variance of the local oscillation-ASE beating noise is given by (12) If the bandwidth of the optical filter is much wider than that of the electrical filter, , and the cyclostationary process is taken into account, (9)- (12) can be simplified as follows. The variance of the shot noise becomes (13) The variance of the signal-ASE beating noise becomes (14) The variance of the ASE-ASE beating noise becomes (15) The variance of the local oscillation-ASE beating noise becomes (16) The receiver electrical signal-to-noise ratio can be represented as the ratio of the photocurrent to the photocurrent variance: (17) This is the general equation that can be used for detection evaluation and noise analysis. If equates to , the system reduces to the case of optically preamplified coherent detection without the time-domain filter.…”