The Study of Transmission Characteristics of a 17×17 All Fluorinated Polyimide Arrayed Waveguide Grating Multiplexer

The transmission characteristics are analyzed for an all fluorinated polyimide arrayed waveguide grating multiplexer around the central wavelength of 1.55 μm with the wavelength spacing of 1.6 nm. The power profile, transmission spectrum, diffraction efficiency and crosstalk are investigated and discussed for different values of parameters, such as the core width, pitch of adjacent waveguides, the number of arrayed waveguides, propagating wavelength and diffraction order. The computed results show that when we select the core thickness as 4 μm, core width as 6 μm, pitch of adjacent waveguides as 15.5 μm, diffraction order as 50, and the number of arrayed waveguides as 91, then the diffraction efficiency of the device can be reached to 57%, and the crosstalk among 17 output channels can be dropped below -50 dB.