Noise performance of optical fiber transmission links that use non-degenerate cascaded phase-sensitive amplifiers

作者：Tong Zhi^*; McKinstrie C J; Lundstrom Carl; Karlsson Magnus; Andrekson Peter A

来源：Optics Express, 2010, 18(15): 15426-15439.

DOI：10.1364/OE.18.015426

Based on semi-classical theory, the noise performance of a multispan fiber optical transmission system employing a cascaded phase-insensitive amplifier (PIA) and phase-sensitive amplifiers (PSAs) is investigated. Compared with the pure-PIA and pure-PSA based in-line amplification schemes, the copier + PSA scheme is found to improve the system NF by up to 6 and 3 dB, respectively, in an optimized long-haul fiber link. In addition, this cascaded configuration will significantly relax the requirement for accurate phase-and wavelength-locking which is rigorously needed in the pure-PSA configuration. This scheme is also modulation-format independent. As a proof of concept, the NF of a fiber parametric amplifier based copier + PSA cascade with inter-stage attenuation representing the fiber link is measured, which shows a 1.8-dB total NF improvement over the conventional EDFA cascade.

• 出版日期2010-7-19