亚毫米尺度双面金属波导的超高阶模及其滤波特性研究  

Research of Ultrahigh-Order Modes in Double Metal-Cladding Optical Waveguide with Submillimeter Scale

作　　者：曹庄琪[1] 陆海峰[1] 李红根[1] 邓晓旭[1] 沈启舜[1] 

机构地区：[1]上海交通大学物理系导波光电子器件实验室,上海200240

出　　处：《光学学报》2006年第4期497-500,共4页Acta Optica Sinica

基　　金：国家自然科学基金(60237010);教育部博士点基金(20020248058)资助课题

摘　　要：利用真空溅射法在一片亚毫米尺度的光学玻璃平板两面分别镀上不同厚度的金属薄膜,构成一种超厚的双面金属包覆波导。采用自由空间耦合技术实现了这种波导中超高阶导模的激发。由于超高阶导模具有对波长特别灵敏而对偏振不灵敏的特殊性质,以此为基础,在实验中演示了可调谐、偏振不灵敏、低损耗(小于0.5 dB)的超窄带(小于0.08 nm)和梳状滤波(通道间隔为100 GHz)。An optical glass slab, which is coated with two metal films with different thickness on both sides, is used to form a new type of ultrathick double metal-cladding optical waveguide with submillimeter-scale. Excitation of the ultrahigh-order modes are implemented by employing the free-space coupling technique. Based on the unusual features of the ultrahigh-order modes, wavelength-sensitive and polarization-insensitive, ultra-narrow bandwidth filtering （0.08 nm） and comb filtering （channel spacing 100 GHz） with tunable, low loss （0.5 dB） and polarization- insensitive operation capabilities are demonstrated experimentally.

关 键 词：导波光学 双面金属波导 自由空间耦合 超窄带滤波器 梳状滤波器 

分 类 号：TN253[电子电信—物理电子学]