共查询到18条相似文献,搜索用时 93 毫秒
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由于孔径效应和孔径渡越时间的限制,传统的相控阵雷达难以在大扫描角下实现大瞬时带宽,有机聚合物光波导延迟线可解决这一问题。先介绍了有机聚合物光波导延迟线的原理和优点,接着综述了三种延迟线:利用聚酰亚胺制成的4位有机聚合物光波导延迟线,多层结构的有机聚合物光波导延迟线,开关选择的超长有机聚合物光波导延迟线。 相似文献
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由于有机聚合物材料具有介电常数小、电光和热光系数大、热损耗小、易于加工及可垂直集成等优点,聚合物波导器件成为近几年研究的热点。本文在介绍光学聚合物材料优点和一些新型聚合物的基础上,重点讨论了聚合物波导器件的最新进展。 相似文献
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由于有机聚合物材料具有介电常数小、电光和热光系数大、热损耗小、易于加工及可垂直集成等优点,聚合物波导器件成为近几年研究的热点.本文在介绍光学聚合物材料优点和一些新型聚合物的基础上,重点讨论了聚合物波导器件的最新进展. 相似文献
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光纤通信技术开辟了大容量、高速和低损耗的通信方式。集成波导光器件是构成光通信网和系统的重要组成部分,研制这些器件具有十分重要的现实意义。当前光通信中有代表性的器件是激光器、接收器、调制器、滤波器和控制器等。本文以光通信中三种重要的波导器件──光调制器、滤光器和定向耦合器为例,来介绍当前以光通信为主要应用领域的光波导器件的特点和应用。一、光波导技术1.基于LiNbO3的光波导技术光波导器件可采用无定形体材料、铁电材料和半导体材料。采用的无定形体材料包括有机聚合物波导和玻璃波导。热光调制器就可以制作… 相似文献
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本文首先对用于光电印制电路板上的聚合物光波导的材料及特点进行了详细介绍并作比较,然后对聚合物光波导材料聚甲基丙烯酸甲酯性能的提高方法进行了详尽介绍,并对聚合物光波导材料含氟聚酰亚胺的单体及合成进行了简单介绍,最后对聚合物光波导的成型工艺和相关性能检测方法进行了详尽阐述。 相似文献
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硅基光波导材料的研究 总被引:2,自引:2,他引:0
光波导是集成光路及其元器件中最基本的构成单元。本文介绍了各种不同类型的光波导材料的特性。硅材料作为目前研究得最透彻的半导体材料,它在光电子领域的应用也是令人关注的。硅基光波导材料种类繁多,主要包括聚合物、外延硅/重掺杂硅、SiO2,SOI和SiGe/Si等。硅基光波导材料是实现硅基光波导器件的基础,本文阐明了它们各自的特点和应用前景。其中聚合物、SiO2和SOI波导是目前研究的热点。 相似文献
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Polymers are emerging as new alternative materials for optical communication devices. We developed two types of polymer‐based devices for optical communications. One type is for ultra high‐speed signal processing that uses nonlinear optical (NLO) polymers in such devices as electro ‐optic (EO) Mach‐Zëhnder (MZ) modulators and EO 2×2 switches. The other is for WDM optical communications that use low‐loss optical polymers in such devices as 1×2, 2×2, 4‐arrayed 2×2 digital optical switches (DOSs) and 16×16 arrayed waveguide grating (AWG) routers. For these devices, we synthesized a polyetherimide‐disperse red 1 (PEI‐DR1) side chain NLO polymer and a low‐loss optical polymer known as fluorinated polyaryleneethers (FPAE). This paper presents the details of our development of these polymeric photonic devices considering all aspects from materials to packaging. 相似文献
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Vertical cavity devices as wavelength selective waveguides 总被引:1,自引:0,他引:1
We show that novel wavelength-sensitive devices can be fabricated by coupling a semiconductor vertical cavity resonator to a low index waveguide. The optical mode in the resonator propagates at an angle, and the resonator resembles a high index waveguide. A taper in the thickness of the resonator allows different parts of the waveguide to operate at different wavelengths. These structures are analyzed using both thin film equations and waveguide normalism. Concentrating on a waveguide demultiplexer, simple design equations are derived, and a demonstration device is fabricated for TE mode at 0.75 μm operation. Using AlGaAs/AlAs multilayers and a polymer top waveguide, the spectrometer exhibited a dispersion of 29 nm/cm, a wavelength resolution of better than 1 nm, and an intrinsic device efficiency of about 90%. A similar structure containing a light-emitting quantum well operated as a multiwavelength light source by modifying the spontaneous emission into the polymer waveguide 相似文献
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SOI材料是应用于硅基光电子学中的一种重要的光波导材料。近年来随着SOI材料制备和加工技术的成熟,SOI基光波导器件的研究日益受到人们的重视。文章介绍了SOI材料在光电子学领域的一些具体应用,包括了在热光器件、电光器件、亚微米波导器件与光纤的耦合器以及光电子集成芯片等方面的最新研究进展。更小的波导截面尺寸是未来SOI光波导器件发展的必然趋势。 相似文献
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Jin Tae Kim Keun Byoung Yoon Choon-Gi Choi 《Photonics Technology Letters, IEEE》2004,16(7):1664-1666
A novel fabrication process using a hot embossing technique has been developed for micromechanical passive alignment of polymer planar lightwave circuit (PLC) devices. With only one step of embossing, single-mode waveguide straight channels and micropedestals for passive aligning are simultaneously defined on a polymer thin film with an accuracy of /spl plusmn/0.5 /spl mu/m. This process reduces the steps for fabricating alignment structures. A fabricated polymer PLC chip and fibers are combined on a v-grooved silicon optical bench (SiOB) in a flip-chip manner. The process provides a coupling loss as low as 0.67 dB per coupling face and a cost-effective packaging solution for various polymer PLC devices. 相似文献