Experimental comparison of fiber optic parametric, Raman and erbium amplifiers for burst traffic for extended reach PONs

Abstract

We experimentally compare the performance of a polarization-independent fiber optic parametric amplifier (FOPA), a discrete Raman amplifier and a commercial erbium doped fiber amplifier (EDFA) for burst traffic amplification in extended reach passive optical networks (PON). We demonstrate that EDFA and Raman amplifiers suffer from severe transient effects, causing penalty on receiver sensitivity >5 dB for traffic bursts of 10 Gbps on-off keying signal shorter than 10 µs. On the other hand, we demonstrate that FOPA does not introduce a penalty on receiver sensitivity when amplifying signal bursts as short as 5 µs as compared to a non-burst signal. Therefore, FOPA used as a drop-in replacement for an EDFA or Raman amplifier allows us to improve receiver sensitivity by >3 dB for short signal bursts. We conclude that FOPA allows substantially increased power budget for an extended reach PON transmitting variable duration bursts. In addition, we identify the maximum burst duration tolerated by each examined amplifier.

All‐Optical Parametric‐Assisted Oversampling and Decimation for Signal Denoising Amplification

“…Polarization alignment is crucial for the efficient realization of the parametric oversampling process, and in many practical applications, the incoming signal's polarization state may not be known and/or it may change over time. To address this issue, a polarization-insensitive POD processor can be implemented by utilizing techniques similar to those already demonstrated in the context of FOPAs [54,55] and FWM-based time-lens systems. [56] For instance, this would only involve replacing the nonlinear medium in Figure 2a with a nonlinear loop constructed by a polarization beam splitter, where the pump pulse train is equally split into two orthogonal polarization components before being coupled into the nonlinear loop.…”

Fibre Optical Parametric Amplifiers for Communications

“…6 shows receiver sensitivity for each tested amplifier in two cases. In the first case (left figure) the burst period was fixed at 100 μs and the burst duration was varied [16]. It shows that although in the non-burst case (continuous traffic) the EDFA allowed for 1 dB better sensitivity than discrete Raman and PI-FOPA, the EDFA performance as compared to B2B case (no transmission and no amplifier) has dropped significantly as burst duration was changed from 70 μs to 5 μs due to an increased impact of transient effects in EDFA.…”

Impact of Zero-Dispersion Wavelength Fluctuations in a Coupled Dual-Core Fiber Optical Parametric Amplifier

“…Fiber optical parametric amplifiers (FOPAs) offer some attractive features, such as potential for wide-bandwidth, low noise figures below 3 dB, when operated in phase-sensitive mode [1] and fast nonlinear response suitable for burst-mode amplification [2], [3]. However some physical effects determined by either the physics of third-order nonlinear response of the fiber, such as stimulated Brillouin scattering (SBS) that prevents the launch of strong pump power, or by fiber imperfections introduced during its manufacturing, limit the noise figure, the maximum attainable gain and the bandwidth (BW) of the FOPA.…”