标题: | 针对不受相位光罩长度限制的制作新方法分析密波长多工多通道光纤光栅滤波器频谱干扰之最佳化修正 Optimized spectral distortion correction of DWDM multichannel FBG filters for a new fabrication method not limited by the phase mask length |
作者: | 辛宸玮 赖暎杰 Yinchieh Lai 光电工程学系 |
关键字: | 光纤光栅;侧面绕射位置监控;Fiber Bragg Grating;Side-Diffraction Position Monitoring |
公开日期: | 2007 |
摘要: | 本论文提出密波长多工多通道光纤光栅滤波器频谱干扰之最佳化修正方法。先利用其它可能引起频谱干扰的多通道光纤光栅设计方法做初步设计,接着利用Lagrange multiplier optimization(LMO)最佳化演算法来达到降低频谱干扰的最佳化设计。由于原先的设计已提供相当接近的折射率变化轮廓,使得利用LMO进行最佳化运算时只需微小变化原先设计的轮廓便能快速收敛至目标反射频谱,同时此混合演算方法又能保留原先设计方法的优点,例如重叠写入多通道光纤光栅之易于制造的特色。本论文中我们也提出一种不受相位光罩长度限制的光纤光栅制造平台构想并针对之来分析前面所设计出来的密波长多工多通道光纤光栅在实际制造上之容忍误差。此种藉由相位光罩一段一段接续的光纤光栅制造平台,应能大大提升实际制造长度很长或是较复杂之光纤光栅的容忍误差。 This thesis presents work on optimized spectral distortion correction of DWDM multichannel fiber Bragg grating (FBG) filters. The developed hybrid algorithm starts from some other multichannel FBG design method which may suffer from the spectral distortion and use the Lagrange multiplier optimization (LMO) algorithm for final optimization. Due to the initially close-to-optimum index modulation profile, the calculation can be fast converged to the target reflection spectra by using the LMO algorithm and the final design still retains the merits of easy fabrication. We have also proposed a new fabrication method not limited by the phase mask length and have performed the tolerance analysis for the designed DWDM multichannel fiber Bragg grating (FBG) filters based on the proposed fabrication platform. By the section-by-section connection of the phase mask, this platform should effectively reduce the errors during the UV exposure and accurately fabricate FBG devices with long length and complicated profiles. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#GT009524514 http://hdl.handle.net/11536/38892 |
显示于类别: | Thesis |
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