Optical fiber (800-Mbit/sec) transmission experiment at 1.05 microm

An 800-Mbit/sec optical fiber transmission experiment at the 1.05-microm wavelength is reported. Single frequency output of a LiNdP(4)O(12) laser is modulated with a guided-wave LiNbO(3) modulator in an NRZ code and is transmitted through 4-km long single-mode fibers. The minimum receiving level is -30 dBm using a Ge avalanche photodiode. It is shown that, since the repeater spacing is limited by loss rather than dispersion in the present system configuration, a more than 10-km repeater spacing seems to be feasible. Distinctive features and problems associated with the system and constituent devices are discussed.