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We experimentally demonstrate a superior performance of 20-Gbps OFDM/SC-FDE transmission over 20-km WDM-PONs, using a channelized weak-resonant-cavity FPLD with a modulation bandwidth of only 1.25 GHz by using injection-locking, direct detection and adopting the power-loading algorithm.

Employing high-performance 850-nm VCSELs with oxide-relief and Zn-diffusion structures, we demonstrate 17.8-Gbps 2-km OM4 fiber transmissions. Meanwhile, ultra-low EDDR of 106 fJ/(bit·km) with bias current as low as 1.9 mA is achieved.

By use of optimized design 850-nm VCSELs under OOK modulation and FFE/DFE equalization, high bit-rate distance product (35-Gbps 500-m and 25-Gbps 1000-m) through OM4 MMF transmissions with ultra-low power consumption are successfully achieved.

Oxide-relief and Zn-diffusion structures are realized in 850 nm VCSELs. Both record-low energy-to-data-rate ratio (96 fJ/bit at 25 Gbit/sec; 135 fJ/bit at 37 Gbit/sec) and energy-to-data distance ratio 175 fJ/bit.km at 25 Gbit/sec are demonstrated.

We develop a novel SSII cancellation technique and experimentally demonstrated that 74.4% SSII cancellation and 2.8-dB sensitivity improvement can be achieved in a 32-Gbps EAM-based IMDD OFDM transmission system over 100-km uncompensated SSMF.