波导管
材料科学
光学
氮化硅
光子学
光子集成电路
半径
弯曲半径
波长
硅
光电子学
物理
弯曲
复合材料
计算机科学
计算机安全
作者
Florian Vogelbacher,Stefan Nevlacsil,Martin Sagmeister,Jochen Kraft,K. Unterrainer,Rainer Hainberger
出处
期刊:Optics Express
[The Optical Society]
日期:2019-10-15
卷期号:27 (22): 31394-31394
被引量:33
摘要
In this work we present a detailed analysis of individual loss mechanisms in silicon nitride partial Euler bends at a wavelength of 850 nm. This structure optimizes the transmission through small radii optical waveguide bends. The partial Euler bend geometry balances losses arising from the transition from the straight to the bend waveguide mode, and radiative losses of the bend waveguide mode. Numerical analyses are presented for 45-degree bends commonly employed in S-bend configurations to create lateral offsets, as well as 90- and 180-degree bends. Additionally, 90-degree partial Euler bends were fabricated on a silicon nitride photonic platform to experimentally complement the theoretical findings. The optimized waveguide bends allow for a reduced effective radius without increasing the total bend loss and, thus, enable a higher component density in photonic integrated circuits.
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