Abstract: Based on the transmission theory of the arrayed waveguide grating (AWG), the parameter optimization was performed, and the effect of arrayed waveguides bending on transmission characteristics was analyzed for a 33×33 polymeric AWG multiplexer around the central wavelength of 1550.918 nm with the wavelength spacing of 0.8 nm. The analytical results show that the bending of arrayed waveguides causes the phase shift of the light propagating in the AWG, results in the shift of the transmission spectrum, and brings about the variation of the crosstalk. For the designed AWG device, the shift of the transmission spectrum is about 0.01 nm, which is much less than the wavelength spacing of 0.8 nm, and the variation of crosstalk is also little.

Key words: optoelectronics and laser, integration optics, arrayed waveguide grating, waveguide bending, phase shift, spectral shift, crosstalk