10-GB S TRANSMISSION USING 1.3-MU-M LOW-CHIRP HIGH-POWER DIRECTLY MODULATED, PACKAGED DFB LASER MODULE FOR SHORT-DISTANCE (LESS-THAN-50 KM)APPLICATIONS/

We have demonstrated 10-Gb/s transmission over 51 km of standard singl e-mode fiber (SMF) using a 1.3-mu m low-chirp high-power directly modu lated, packaged DFB laser module. With +7-dBm average laser module pow er and -16-dBm PIN receiver sensitivity, the power budget is 23 dB, wh ich allows transmission over 50 km of standard SMF without optical amp lifiers. In addition, we have investigated the impact of fiber chromat ic dispersion on systems performance at 10 Gb/s over a wide range of d ispersion, For the dispersion range of -600 to 0 ps/nm, negative power penalties have been observed due to the pulse compression effect whic h is resulted from a low chirp of the laser, For use of this effect, t he distributed-feedback (DFB) laser wavelength needs to be properly se lected and its range is found to be as wide as 80 nm for transmission over 50 km of embedded standard SMF cables.