A series of field experiments performed with two-wavelengthtransmissions at 622 Mb/s over 200-km of installed single-mode fiberusing a diode-pumped erbium-doped fiber amplifier repeater aredescribed. Both differential phase-shift keying (DPSK) modulation andfrequency-shift keying (FSK) modulation were employed, along with twoimplementations of automated endless polarization control. In a furtherfield experiment, a power budget of 64 dB was demonstrated in the formof repeaterless DPSK transmission at 622 Mb/s over 264 km of installedfiber. The use of such a large power budget to accommodate the sharingof power between many wavelength channels and the accumulation ofspontaneous emission noise through cascaded optical amplifier repeatersis discussed
展开▼
