Abstract
We discuss the applicability of photonic crystal fiber (PCF) with a
uniform air-hole structure to high-speed and wide-band transmission over
conventional telecommunication bands. We design the PCF to maximize the
effective area by utilizing the macro-bending losses of the fundamental and
first higher order modes (HOM) and clarify that a single-mode and low
bending loss PCF can realize the largest effective areas of 133 and 157 $\mu$m$^{2}$ for transmission over the 1260–1625 nm (${\rm O}\sim {\rm L}$ bands) and 1460–1625 nm (${\rm S} \sim {\rm L}$ bands) wavelength ranges, respectively. We then investigate the
impact of the designed PCF on nonlinearity reduction over a wide wavelength
range and show that the PCF helps to increase the maximum channel power in a
wavelength division multiplexing system. We also discuss the distributed
Raman amplification (DRA) characteristics of PCF with a large effective
area. Our results show that we can expect to improve the signal to noise
ratio with DRA in spite of the low nonlinearity of the designed PCF.
Dispersion compensating fiber (DCF) with a conventional W-shaped index
profile is designed to compensate for the relatively large dispersion of the
PCF, and we show that the designed DCF can extend the dispersion
compensation bandwidth from 1340 nm to 1650 nm for a 40
Gbit/s transmission. Finally, we clarify the
applicability of the large effective area PCF with the uniform air-hole
structure as a high-speed and wide-band transmission medium.
© 2009 IEEE
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