At the ECOC 2016 conference several test partners revealed record data transmission results using VI Systems fibre coupled 850nm VCSEL modules for data rates of up to 160 Gbit/s.
Several test partners revealed at the ECOC 2016 in Düsseldorf, Germany record data transmission results using VI Systems fibre coupled 850nm VCSEL modules. The results have been obtained with the latest generation of vertical cavity surface emitting laser (VCSEL) fibre coupled modules (V50-850M and V100-850M) in combination with advanced modulation schemes and equalization technology.
A data rate of up to 108 Gbit/s over above 100 m with 850nm multimode VCSEL was demonstrated in cooperation with Warsaw University of Technology using pulsed amplitude modulation (PAM) with 4 or 8 levels (4-PAM and 8-PAM). The presented results prove that high bit rate data interconnects can be realized utilizing the 850 nm VCSELs and PAM modulation, while SM VCSELs offer enhanced performance. Operation of PAM-8 was worse than of PAM-4. By combining PAM with trellis coding, received sensitivity was significantly improved, especially in a lower BER range.
A discrete multitone modulation (DMT) was applied to single mode 850nm VCSEL for data transmission of 112 Gbit/s over 100 m of multimode fibre. The demonstration was made in cooperation with Huawei, Hong Kong Polytechnic University and University of Science &Technology Beijing.
With duo binary 4-PAM modulation technology a maximum data rate of 160 Gbit/s (BTB) or 150 Gbit/s over 100 m of multimode fibre using multimode VCSEL have been demonstrated by Huawei. More than 2-dB performance gain is obtained by employing the novel 13-level duobinary signalling in contrast to the conventional 7-level duobinary 4-PAM signalling.
By Per Danielsen