The system of L-band 2×10 Gb/s WDM transmission over conventional single mode fibre with 600 km by chirped fibre Bragg gratings dispersion compensation

A chirped fibre Bragg grating according to ITU-T suggested L-band(2nd channel $lambda _{1}=1570.83$~nm; 80th channel $lambda_{2}=1603.57$ nm) with more than 1800 ps/nm single channel dispersioncompensation is presented in this paper, of which the cladding modeloss, the delay curve ripple and the power fluctuation of thereflected spectrum are less than 0.5 dB, 50 ps and 0.25 dB,respectively. With this new FBG as dispersion compensation device, a$2times 10$ Gb/s wavelength division multiplexing (WDM) L-bandtransmission of 600 km based on conventional single mode fibre (G.652fibre) is performed without forward error correction. The bit errorrate (BER) is less than 10$^{ - 12}$ and the power penalties of the2{nd} and 80{th} channel of L-band are 1.8~dB and 2.0~dB,respectively.