20 January 2006 Analysis on the light leakage of optical waveguide storage device
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Proceedings Volume 6027, ICO20: Optical Information Processing; 60274R (2006) https://doi.org/10.1117/12.668426
Event: ICO20:Optical Devices and Instruments, 2005, Changchun, China
This paper deals with the theory of the light leakage from the slab waveguide. In the optical waveguide multilayer storage (WMS) device, the readout signals are come from the light leaking at the defective points. The efficiency of light leakage is an important issue in WMS device design. Along the direction of the wave propagating, the mono-layer structure can be regarded approximately as planar waveguide covered with periodic perturbation, or near one-dimensional (1-D) waveguide grating. This kind of 1-D waveguide grating has offered the essential structure for the coupling among the propagating modes and radiation modes. Through its interaction with the periodic structure, the propagating wave excites radiating waves which providing the output coupling. A perturbation technique is used to calculate the modes with different parameters in this grating structure. The ratio of power radiated into the outer media depends on the waveguide structure and the grating parameters. So the conversion efficiency from the propagating modes to the radiation modes can be optimally controlled by the choice of the structure parameters. This research provides a basic estimation in the design of WMS device.
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Haiyan Xie, Zongcheng Liang, Jiabi Chen, Songlin Zhuang, "Analysis on the light leakage of optical waveguide storage device", Proc. SPIE 6027, ICO20: Optical Information Processing, 60274R (20 January 2006); doi: 10.1117/12.668426; https://doi.org/10.1117/12.668426

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