Microstructures in Polymer Fibres for Optical Fibres, THz Waveguides, and Fibre-Based Metamaterials
Figure 5
(a) Cross section of a PMMA multimode high-bandwidth mPOF. (b) Bit error rate for 9.5 Gb/s signal at 636 nm with on-off keying as a function of received power over a 50 m length of fibre, with inset showing eye diagrams. (c) Bit and power allocation using a 650 nm laser diode and discrete multitone (DMT) modulation, and also over 50 m of fibre. (d) Constellation diagram of the demodulated signals from (c) showing 32 level quadrature amplitude modulation (QAM) from subcarriers 20–29, and 8-QAM from subcarriers 125–135. Adapted from (a) and (b) [12], (c) and (d) [13].
