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14 July 2000 Comparison of multipoint and midspan spectral inversion in high-bit-rate optical links
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Proceedings Volume 3944, Physics and Simulation of Optoelectronic Devices VIII; (2000)
Event: Symposium on Integrated Optoelectronics, 2000, San Jose, CA, United States
In long distance high bit rate optical links, the combined effect of fiber dispersion, nonlinearities and polarization mode dispersion determines the system performance. Mid-span spectral inversion (MSSI) has been proposed for dispersion and nonlinearity compensation. Although the use of spectral inverters in more than one point along the optical link has been discussed in the past, their impact on the transmission performance has never been examined in a detailed and quantitative way. In this work a comparison of the transmission performance when using MSSI or multi-point spectral inversion (MPSI) is presented, for 10- and 40- Gb/s signal transmission and for various transmission conditions. The transmission is described by the non-linear Schroedinger equation and the performance is estimated through the Q-factor analysis of the received optical signal. The comparison starts assuming ideal inverters where the complex conjugate of their input signal is generated at the output. In this case, the MPSI method appears to be more effective in compensating the dispersion and the nonlinearities, allowing highly performing transmission. The results are different when a real spectral inverter based on four-wave mixing in highly nonlinear dispersion shifted fibers is considered. In this case no improvement in the transmission performance can be observed.
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Ioannis Zacharopoulos, Ioannis Tomkos, and Dimitrios Syvridis "Comparison of multipoint and midspan spectral inversion in high-bit-rate optical links", Proc. SPIE 3944, Physics and Simulation of Optoelectronic Devices VIII, (14 July 2000);

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