Arrayed Waveguide Grating For High Speed Optical Communication System

With the advent of the big data era,the communication capacity and response speed of the existing communication networks have failed to meet the demand for exponentially increased data traffic.All-optical interconnection is an effective solution to the bottleneck of electrical interconnection transmission.The research on all-optical routers and optical buffers has drawn people's attention.At the same time,the standards for LAN and MAN communication are redrawn.The key transceiver modules have been researched and gradually become commercialized.After describing the working principle,structure design method,simulation method and passband flattening technologies,in this paper,we creatively proposes an all-optical buffer based on arrayed waveguide grating router(AWGR).The structure uses AWGR,wavelength converter and semiconductor optical amplifier to form an optical waveguide delay linear type all-optical buffer.The device theoretically can achieve infinite and free-time granularity optical delay for N channel wavelengths and can be miniaturized by optical integration.We design and experimentally fabricated a 8 x 8 horseshoe-shaped AWGR with a channel spacing of 400GHz based on SOI platform and an 16 x 16 AWGR with a channel spacing of 200GHz for the application of optical buffer and wavelength router,respectively.For 100G Ethernet application,we designed a 1:4 AWG with a channel spacing of 4.5nm based on oxynitride(SiON)material.The above design are given the design steps and parameters,structural characteristics,fabrication process,and the results.