70-GHz-Spaced 40>tex<$,times,$>/tex<42.7 Gb/s Transpacific Transmission Over 9400 km Using Prefiltered CSRZ-DPSK Signals, All-Raman Repeaters, and Symmetrically Dispersion-Managed Fiber Spans

Dispersion compensating fiber used as a transmission fiber: inverse/reverse dispersion fiber

“…For example, dispersion deviation was ±0.05 ps/nm/km over the whole C-band. Using new SMF-E plus IDF-45E type fiber, many experimental transmission results have been reported, and high performance was confirmed with SMF-E plus IDF-E [33][34][35][36][37][38][39][40][41][42]. The aggregate of 10 and 40 Gb/s transmission experimental results reported in ECOC'03 and OFC'04 are summarized in Fig.…”

“…In considering counter-transmission and lower accumulated dispersion, not-only a SMF-IDF (AB) configuration, but also a SMF-IDF-SMF (ABA) configuration was proposed [42], (2) equivalent A eff though they still required advanced techniques such as special signal formats, Raman amplification and so on to cancel the impairment due to an accumulated dispersion. Furthermore, a simpler configuration with MDF has been realized now, so experiments with a double configuration of SMF-E+LL-IDF have not been reported until now.…”

Impact of DCF properties on system design

“…In commercially deployed systems, localized dispersion compensation is implemented by inserting reels of DCFs in huts, periodically located along a transmission line. In contrast, diffused dispersion compensation is generally implemented by using advanced transmission fibers that are composed of fiber segments with opposite-sign dispersion [26][27][28][29][30][31][32][33][34][35][36][37]. Such fibers are referred to as dispersion-managed fibers (DMFs) and cables containing such fibers are called dispersion-managed cables (DMCs).…”

Survey of systems experiments demonstrating dispersion compensation technologies

“…The details of UltraWave TM will be discussed further below with terrestrial experiments. Gbps over the "trans-Pacific" distance of 9400 km in a 16-span loop with "submarinelength" 43.5-km dispersion-managed spans of UltraWave TM fiber [44]. Discussion in the paper focuses on the maximum acceptable level of channel bandwidth pre-filtering of the CSRZ-DPSK signals to reduce inter-channel nonlinear interaction among the 70-GHz-spaced channels while not introducing intolerable levels of signal distortion to produce a system with maximal spectral efficiency.…”

“…Later in 2001, this work was extended to double the capacity to 80 channels spaced at 50 GHz [44]. At the same time, the system length was extended from 4000 to 5200 km, a non-intuitive result.…”