Fiber Bragg gratings can be used for making all fiber demultiplexers. AWG Demultiplexer.osd (see Figure 1) shows an Array waveguide grating (AWG) demultiplexer.

Optical System - Figure 1 - AWG Demultiplexer

Figure 1 AWG Demultiplexer

The OSA at the AWG output shows the selected WDM channel. For the first channel, the results are shown in Figure 2.

Optical System - Figure 2 - AWG OSA Input

Figure 2 AWG OSA Input

The AWG transmission is shown in Figure 3.

Optical System - Figure 3 -  AWG transmission

Figure 3 AWG transmission