Fig. 2. The FPDA reconfigured as a wavelength multiplexer/demultiplexer.

a Schematic of the FPDA when operating as a wavelength demultiplexer. b Measured transmission spectrum at port 9 of the 8-channel demultiplexer with a channel spacing of 0.15 nm. c Measured transmission spectrum at the 8 drop ports (ports 5–8 and 13–16) of the demultiplexer with a channel spacing of 0.15 nm. d Measured transmission spectrum at port 9 of the 8-channel demultiplexer with a channel spacing of 0.2 nm. e Measured transmission spectrum at the 8 drop ports (ports 5–8 and 13–16) of the demultiplexer with a channel spacing of 0.2 nm.