Multi-wavelength mixing in a semiconductor optical amplifier and its consequence in a preamplified wavelength division multiplexing system

Schares, Laurent; Chen, Z.-Y.; Debarge, G.; Jaouën, Yves; Duan, Guang‐Hua; Sigogne, D.; Nakajima, Hisao; Carenco, A.

doi:10.1109/cleo.1999.834133

Cited by 1 publication

(3 citation statements)

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“…Although still relevant, the role of FWM is more modest. Similar results were obtained for equivalent curves produced with = 600 GHz, and = 800 GHz, and are in agreement with the experimental results presented in reference Schares et al (1999) for tighter channel plans and a ten times lower bit rate.…”

Section: Determination Of the Main Nonlinear Effectsupporting

confidence: 93%

“…2 agrees qualitatively very well with the experimental curves presented in Fig. 4.6 of Schares et al (1999). The comparison cannot be (or is expected to be) taken further because of the difference in channel spacing, bit rate, and SOA characteristics.…”

Section: Impact Of Channel Spacingsupporting

confidence: 78%

“…Due to characteristics such as small footprint, potentially low cost, and wide available bandwidth, the use of SOAs as in-line amplifiers has resurged (Rogowski et al 2007;Singh and Kaler 2006;Downie et al 2005;Spiekman et al 2000a). In Schares et al (1999) a 2.5 Gb/s multi-wave mixing analysis for two channel spacing values (0.5 and 1.0 nm) was carried out, uncovering cross-gain modulation (XGM) as the main NL impairment in WDM pre-amplified systems. In the present work, we build on those findings to theoretically investigate how much the SOA NL response affects the 40-km 4 × 25 Gb/s Ethernet PMD at 4 different channel spacing values and at a range of SOA input powers corresponding to those of interest for this (and other similar) application.…”

Section: Introductionmentioning

confidence: 99%

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SOA nonlinearities in 4 × 25 Gb/s WDM pre-amplified system for 100-Gb/s Ethernet

2008

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A simulation analysis of the impact that the nonlinear response of a semiconductor optical amplifier (SOA) has in a four-channel WDM pre-amplified transmission system is presented in the framework of the recently proposed extended-reach (40-km, 4 × 25 Gb/s) 100 Gb Ethernet link. Channel spacing values ranging from 200 to 800 GHz, and fiber losses between 0 and −20 dB are considered. A maximum power penalty of 4.5 dB is predicted for short fiber lengths and for the tightest channel plan. For short fiber lengths, the penalty drops by about 0.8 dB when moving from 400 to 800 GHz; whereas for long fiber lengths, the penalty increases by 0.2 dB, provided that an average dispersive fiber is utilized. The widely spaced channel plan then represents the best choice in terms of the analyzed physical effects to implement the next-generation 100 GbE link. Further, our numerical investigation includes a discrimination analysis that confirms cross-gain modulation as the main overall SOA nonlinear impairment in the analyzed architecture, and establishes ultra-fast carrier heating-induced FWM as responsible for the system performance difference observed as a function of channel spacing. The difference practically vanishes for fiber lengths above 30 km. Finally, the proposal of an equation that fits the simulated power spectrum density of the first-order four-wave mixing-generated product as a function of channel spacing is presented as an aid to validate our numerical results.

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Section: Determination Of the Main Nonlinear Effectsupporting

confidence: 93%

Section: Impact Of Channel Spacingsupporting

confidence: 78%