光学学报, 2006, 26 (4): 497, 网络出版: 2006-05-17
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
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 waveguide optics double metal-cladding optical waveguide free-space coupling ultra-narrow bandwidth filter comb filter
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)。
Abstract
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.
曹庄琪, 陆海峰, 李红根, 邓晓旭, 沈启舜. 亚毫米尺度双面金属波导的超高阶模及其滤波特性研究[J]. 光学学报, 2006, 26(4): 497. 曹庄琪, 陆海峰, 李红根, 邓晓旭, 沈启舜. Research of Ultrahigh-Order Modes in Double Metal-Cladding Optical Waveguide with Submillimeter Scale[J]. Acta Optica Sinica, 2006, 26(4): 497.
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