Study On Silicon Photonic Wire Arrayed Waveguide Grating (AWG)

Integrated Optics is a mutual-influential combination of optics and film electronics. There is a fast progress in silicon-based optoelectronics, which lias been paid more attention in DWDM system.Firstly, this paper illustrates the development of integrated optics, and in particular, gives the pictures over the historical development of silicon-based optoelectronics. As one of the key elements in DWDM system, Arrayed Waveguide Grating (AWG) has been widely used owing to its perfect performance. In brief, we introduce the basic principle and function of AWG, and meanwhile, its fabrication materials and prospects. And also, we present the design procedures of AWG and optimization scheme for AWG's functions.The bend waveguide is one of the indispensable structural units. This paper also presents the finite differential method (FD method) as a tool of calculating the field distribution and effective propagation constant.Furthermore, we figure out the relationship between the bend radius and the loss of waveguide. As the combination of SOI material and AWG's advantages, we analyze the 1×4-channel AWG in detail by the method of formula and OptiBPM software, and the field distribution of every part of AWG. Importantly, the author discusses the influential factors on AWG's spectral response, which include structural parameters and fabrication errors.1×32 channel AWG, as an example, we figure out how the four structural parameters have an impact on the performances. In conclusion, AWG is a kind of phase-sensitive device.At the very last, we put forward three stigmatic points, which is implemented to design narrow channel-spacing (0.1 nm) and super channel numbers (256 channels) AWG of flat field of the output ports, based on SOI material. We calculate the structural parameters of different parts and spectral response, and at the same time, we compare the former to the standard Rowland circle. The results show that the device owns the lower insert loss, crosstalk between adjacent channel approaching to 14dB above and an excellent uniformity. Above all, this method could be used to design AWG of better performance.