In erbium doped optical fiber amplifier （EDFA） and dense wavelength-division multiplexing （DWDM） lightwave communication system

fiber nonlinear effects and chromatic dispersion are the main system-performance limiting factors. The effect of fiber nonlinear effects and chromatic dispersion on system has been analyzed in brief. The non-zero dispersion-shifted single-mode fiber named LAPOSHR which is capable of controlling chromatic dispersion

suppressing nonlinear effects and is desirable for high capacity and long-haul DWDM system have been designed and fabricated. The main advantages of LAPOSHR are as following: low dispersion（2～6 ps/nm·km between 1530nm and 1565nm）

large effective area （73μm2 @1550nm）

low attenuation （0.20dB/km @1550nm）

low polarization mode dispersion （PMD ） and good bending performance.