Bismuth-Doped O-band Bidirectional Fiber Amplifier for High-Speed Passive Optical Networks

We experimentally demonstrate the first bismuth-doped, cross-gain-modulation-free, bidirectional single amplifier for O-band passive optical networks. It offers 20.8-dB downstream and 15.2-dB upstream power budget improvement, and 0.5-dB power budget penalty under upstream burst mode.