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Study On Silicon Wavelength Division Multiplexing Devices

Posted on:2017-09-08Degree:MasterType:Thesis
Country:ChinaCandidate:S L LiuFull Text:PDF
GTID:2348330503989789Subject:Electronic Science and Technology
Abstract/Summary:PDF Full Text Request
In order to meet the requirements and development of great information capacity and fast transmission rate,a new generation of ultra high speed optical fiber transmission technology is proposed: wavelength division multiplexing(wavelength division multiplex, WDM). At the sending end of the optical communication system of WDM using multiplexing multiplexer will carry all kinds of information of different wavelength of the optical carrier signals converge together, within the same optical synchronous transmission multiple different wavelengths of light, so that data transmission speed and capacity gets double; in receiving end, demultiplexer with the separation of waves of various wavelengths and the optical receiver processing obtains the transmission side to send the different wavelengths to carry different information. The simultaneous transmission of many different wavelengths of light signals in the same optical fiber technology called wavelength division multiplexing.There are a lot of production of WDM technology, under the support of the national key project(863), this paper based on different thickness of silicon on insulator to make WDM devices. To improve the array waveguide grating by optimizing design method(AWG) we get the performance of the device and try a new WDM device.The main content of the thesis includes:(1) Several key waveguide in the AWG device with different thickness of SOI structure model and the corresponding effective refractive index method are introduced, such as slab waveguide, rectangular waveguide and ridge waveguide, and the single mode condition of ridge waveguide is given;(2) According to the single mode conditions of large section size of ridged waveguide, based on 3?mSOI the 1x4 channel AWG is designed, using more precise cylindrical coordinate beam propagation method(BPM) to simulate the AWG transmission spectrum and insertion loss is almost zero, the adjacent channel crosstalk is larger than 20 dB.(3) A 4×4 arrayed waveguide grating(AWG) demultiplexer is designed and fabricated based on silicon on insulator(SOI) nanowire.The device is fabricated on 220 nm silicon-on- insulator(SOI) substrate by electron beam lithography(EBL) and inductively coupled plasma(ICP) etching.The demultiplexing characteristics are observed with a loss of about 9.6 d B,a channel spacing of 2.8-3.6 nm and crosstalk of about 4dB.The 3 dB bandwidth is about 5 nm.(4) A cascade of photonic crystal ring is designed and fabricated to realize the function of wavelength division multiplexing, through the finite difference time domain method(FDTD) to calculate single photonic crystal micro ring, and a cascade of photonic crystal micro ring is fabricated and tested, due to the presence of more modes in photonic crystals, the device still needs to be optimized to realize the wavelength division multiplexing.
Keywords/Search Tags:Silicon on insulator, Wavelength division multiplexer, Arrayed waveguide, grating, Photonic crystal
PDF Full Text Request
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