Research On Optical Wavelength Division-power Division Integrated Device Technology

With the rapid development of information technology,wavelength division multiplexing optical fiber communication and optical access network technology have become the core means of constructing 5G communication,Internet,Internet of Things,and the underlying information transmission link of big data centers.The high-speed broadband optical access system urgently needs an integrated device combining optical wavelength division and power division,and requires the device to have good transmission response characteristics for high-speed optical pulses.However,as a common wavelength division multiplexing/demultiplexing device,arrayed waveguide gratings(AWG)are prepared according to the Roland surface principle.The single device is large in size and difficult to integrate with other functional units.Therefore,it is necessary to explore the key technology of integrating AWG with M×N optical splitter to form a highly integrated,high performance AWG-Splitter chip.This paper first proposes a U-shaped AWG structure,which changes the way of conventional AWG,and diffuses the input and output waveguide ends into the array waveguide,which is in a "U" shape,which effectively reduces the device volume.At the same time,the power distribution unit is added to the output port of the U-shaped AWG device to form a single AWG-Splitter integrated chip.Then,the optical wave working mode and transmission characteristics of the AWG-Splitter integrated chip are simulated and analyzed.The transmission response of U-shaped AWG to several different types of high-speed optical pulses and different pulse modulation modes is discussed.The influence of the parameters such as the number of AWG array waveguides,channel spacing and array waveguide spacing on the pulse transmission is analyzed.Finally,an experimental study on the optimized design of the AWG-Splitter integrated device was carried out.The AWG-Splitter chip was prepared by enrolling the film,and the AWG-Splitter integrated device was obtained by encapsulation.The AWG-Splitter integrated device test system was built.The test results show that the technical indexes such as device operating bandwidth,insertion loss,return loss,directionality,uniformity and polarization-related loss are in accordance with the simulation results and meet the requirements of national standards.The device also passed the test of Jiangsu Province Quality and Technical Supervision Communication Product Quality Inspection Station.