Figure 2 | Scientific Reports

Figure 2

From: Mode division multiplexing using an orbital angular momentum mode sorter and MIMO-DSP over a graded-index few-mode optical fibre

Figure 2

(a) Experimental setup as described in the text. (EDFA: erbium-doped fibre amplifier. SMF: single mode fibre. Pol-Con: polarization controller. PBS: polarization beam splitter. FMF: few-mode fibre.) (b) Experimental setup of the heterodyne coherent detection. (OC: optical coupler. LO: local oscillator. ADC: analogue-to-digital converter. MIMO-DSP: multiple-input-multiple-output digital signal processing. CMA: constant modulus algorithm). (c) Optical spectrum of the heterodyne detection - QPSK signal and the LO.

Back to article page