scholarly journals Polymer multimode waveguide bend based on a multilayered Eaton lens

2019 ◽  
Vol 58 (19) ◽  
pp. 5219 ◽  
Author(s):  
S. Hadi Badri ◽  
H. Rasooli Saghai ◽  
Hadi Soofi
Keyword(s):  
Multimode Waveguide ◽  
Waveguide Bend

scholarly journals SOI multimode waveguide bend with radially bridged SWGs for broadband (de)multiplexing -INVITED

2021 ◽  
Vol 255 ◽  
pp. 01003
Author(s):  
Kevan K. MacKayt ◽  
Winnie N. Ye
Keyword(s):  
Effective Radius ◽  
Silicon On Insulator ◽  
Propagation Loss ◽  
Multimode Waveguide ◽  
Broad Bandwidth ◽  
Subwavelength Grating ◽  
Mode Division Multiplexing ◽  
Design Choice ◽  
Design Freedom ◽  
Waveguide Bend

A novel broadband multimode waveguide bend is proposed that supports the propagation of multiple TE modes on a silicon-on-insulator platform. The gradient curvature bend utilizes trapezoidal subwavelength grating (SWG) segments, connected by adiabatically tapered radial strips to achieve efficient mode (de)multiplexing. The inclusion of the radial strips offers an extra degree of design freedom, allowing the realization of a multimode bend with only one single full etch step. The access waveguide has a width of 2.075 μm with an effective radius of 10 μm. Propagation loss for all modes remains below 2.96 dB, and intermodal crosstalk has a maximum of -19 dB across a broad bandwidth of 100 nm, centred at 1550 nm. This work presents an excellent design choice for broadband mode-division multiplexing operations.

Compact and broadband multimode waveguide bend by shape-optimizing with transformation optics

2020 ◽  
Vol 8 (12) ◽  
pp. 1843
Author(s):  
Shuyi Li ◽  
Lifeng Cai ◽  
Dingshan Gao ◽  
Jianji Dong ◽  
Jin Hou ◽  
...  
Keyword(s):  
Transformation Optics ◽  
Multimode Waveguide ◽  
Waveguide Bend

Design of an ultrasharp silicon multimode waveguide bend assisted by multiregional subwavelength grating structures

2021 ◽  
Vol 15 (04) ◽  
Author(s):  
Juanli Wang ◽  
Shangsen Sun ◽  
Runsen Zhang ◽  
Fengchun Zhang ◽  
Ning Zhu
Keyword(s):  
Multimode Waveguide ◽  
Subwavelength Grating ◽  
Waveguide Bend

scholarly journals Low-loss and low-crosstalk multimode waveguide bend on silicon

2018 ◽  
Vol 26 (13) ◽  
pp. 17680 ◽  
Author(s):  
Xiaohui Jiang ◽  
Hao Wu ◽  
Daoxin Dai
Keyword(s):  
Multimode Waveguide ◽  
Low Loss ◽  
Waveguide Bend

scholarly journals High-Order Multimode Waveguide Interferometer for Optical Biosensing Applications

Sensors ◽  
2021 ◽  
Vol 21 (9) ◽  
pp. 3254
Author(s):  
Yuri Hayashi Isayama ◽  
Hugo Enrique Hernández-Figueroa
Keyword(s):  
Power Distribution ◽  
Output Signal ◽  
Limit Of Detection ◽  
High Order Mode ◽  
High Order ◽  
Multimode Interference ◽  
Multimode Waveguide ◽  
Waveguide Section ◽  
Optical Biosensing ◽  
Novel Structure

A generalization of the concept of multimode interference sensors is presented here for the first time, to the best of our knowledge. The existing bimodal and trimodal sensors correspond to particular cases of those interference sensors. A thorough study of the properties of the multimode waveguide section provided a deeper insight into the behavior of this class of sensors, which allowed us to establish new criteria for designing more sensitive structures. Other challenges of using high-order modes within the sensing area of the device reside in the excitation of these modes and the interpretation of the output signal. To overcome these, we developed a novel structure to excite any desired high-order mode along with the fundamental mode within the sensing section, while maintaining a fine control over the power distribution between them. A new strategy to detect and interpret the output signal is also presented in detail. Finally, we designed a high-order sensor for which numerical simulations showed a theoretical limit of detection of 1.9×10−7 RIU, making this device the most sensitive multimode interference sensor reported so far.

scholarly journals Integration of a photonic crystal polarization beam splitter and waveguide bend

2009 ◽  
Vol 17 (10) ◽  
pp. 8657 ◽  
Author(s):  
Wanhua Zheng ◽  
Mingxin Xing ◽  
Gang Ren ◽  
Steven G. Johnson ◽  
Wenjun Zhou ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Beam Splitter ◽  
Polarization Beam Splitter ◽  
Waveguide Bend

MODE ANALYSIS AND SYSTEMATICAL DESIGN OF WIDE-BANDWIDTH PHOTONIC CRYSTAL 60° WAVEGUIDE BENDS WITH HIGH TRANSMISSION

2012 ◽  
Vol 26 (26) ◽  
pp. 1250170 ◽  
Author(s):  
TAO CHEN ◽  
CAILONG ZHENG ◽  
JINXING LI
Keyword(s):  
Photonic Crystal ◽  
Expansion Method ◽  
Transmission Efficiency ◽  
Slab Waveguide ◽  
Mode Analysis ◽  
Two Dimensional ◽  
Photonic Crystal Slab ◽  
High Transmission ◽  
Index Approach ◽  
Waveguide Bend

We present a procedure to enhance the transmission efficiency of a photonic crystal slab waveguide bend by introducing an air hole with the same radius at the center of bend and optimizing the positions of three neighboring holes in the corner. The improvement relies only on the method of displacing holes which is technologically preferred to controlling variations in hole size or shape. We employ the effective refractive index approach and two-dimensional plane wave expansion method to analyze the guide modes of the straight waveguide and waveguide bend. The transmission character of bent waveguides is investigated using two-dimensional finite-difference time-domain method. Numerical studies demonstrate that the approximate method of mode analysis is unsuitable to our model. Alternatively, we systematically study the effect of different positions of the holes on the transmission. The optimized bends for the high transmission with broad bandwidth are proposed.

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