Ultra-broadband mode converters based on length-apodized long-period waveguide gratings
Ultra-broadband mode converters based on length-apodized long-period waveguide gratings
复制标题
基于长度变迹长周期波导光栅的超宽带模式转换器
DOI：
10.1364/oe.25.014341
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发表时间：
2017-06-26
期刊：
影响因子：
3.8
通讯作者：
Chiang, Kin Seng
中科院分区：
文献类型：
--
作者：
Wang, Wen;Wu, Jieyun;Chiang, Kin Seng
我们提出了一种基于变迹长周期光栅结构的超宽带模式转换器，其中在光栅轮廓的战略位置引入p相移。采用三段变迹光栅结构，分别设计并制作了沿聚合物沟道波导沿着形成侧壁光栅和表面光栅的LP 01-LP 11 a和LP 01-LP 11 b模式转换器。所制造的LP 01-LP 11 a和LP 01-LP 11b模式转换器分别在类似于120 nm和类似于150 nm的带宽上提供高于99%的转换效率，或者分别在类似于180 nm和类似于300 nm的带宽上提供高于90%的转换效率。这些器件的传输特性对偏振和温度变化不敏感。这些模式转换器可以在基于少模光纤的超宽带模分复用传输系统中找到应用，并且设计原理可以应用于广泛应用的一般光栅模式耦合器件。(C)2017美国光学学会
We propose an ultra-broadband mode converter based on the structure of a lengthapodized long-period grating, where p-phase shifts are introduced at strategic locations of the grating profile. Using a 3-section length-apodized grating structure, we design and fabricate an LP01-LP11a and an LP01-LP11b mode converter with a sidewall grating and a surface grating formed along a polymer channel waveguide, respectively. The fabricated LP01-LP11a and LP01-LP11b mode converters provide a conversion efficiency higher than 99% over a bandwidth of similar to 120 nm and similar to 150 nm, respectively, or a conversion efficiency higher than 90% over a bandwidth of similar to 180 nm and similar to 300 nm, respectively. The transmission characteristics of these devices are weakly sensitive to polarization and temperature variations. These mode converters can find applications in ultra-broadband mode-division-multiplexing transmission systems based on few-mode fibers and the design principle can be applied to general gratingbased mode-coupling devices for a wide range of applications. (C) 2017 Optical Society of America