Design of Asymmetrical Silicon Waveguide Grating by Introducing the Scattering Loss

2015 ◽  
Author(s):  
Shuang Zheng ◽  
Jian Wang
Keyword(s):  
Scattering Loss ◽  
Waveguide Grating ◽  
Silicon Waveguide

Design and applications of silicon waveguide grating couplers

2012 ◽  
Author(s):  
Xia Chen ◽  
Zhenzhou Cheng ◽  
Christy K. Y. Fung ◽  
Hon K. Tsang
Keyword(s):  
Grating Couplers ◽  
Waveguide Grating ◽  
Silicon Waveguide

VAPOR-REDISSOLUTION TECHNIQUE FOR REDUCTION OF POLYMER/Si ARRAYED WAVEGUIDE GRATING LOSS

2007 ◽  
Vol 21 (08) ◽  
pp. 481-488
Author(s):  
HAIMING ZHANG ◽  
DAMING ZHANG ◽  
ZHENKUN QIN ◽  
CHUNSHENG MA
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Central Channel ◽  
Arrayed Waveguide Grating ◽  
Scattering Loss ◽  
Loss Measurement ◽  
Waveguide Grating ◽  
Polymer Waveguide ◽  
Arrayed Waveguide ◽  
Scanning Electron

An efficient vapor-redissolution technique is used to greatly reduce sidewall scattering loss in the polymer arrayed waveguide grating (AWG) fabricated on a silicon substrate. Smoother sidewalls are achieved and verified by scanning electron microscopy. Reduction of sidewall scattering loss is further measured for the loss measurement of both straight waveguides and AWG devices. The sidewall loss in straight polymer waveguide is decreased by 2.1 dB/cm, the insertion loss of our AWG device is reduced by about 5.5 dB for the central channel and 6.7 dB for the edge channels, the crosstalk is reduced by 2.5 dB, and 3-dB bandwidth is narrowed by 0.05 nm after the vapor-redissoluton treatment.

2D Asymmetric Silicon Waveguide Grating for Optical Transceiver

2014 ◽  
Author(s):  
Chao Li ◽  
Haifeng Zhou ◽  
Mingbin Yu ◽  
Guo-Qiang Lo
Keyword(s):  
Waveguide Grating ◽  
Silicon Waveguide

scholarly journals Diffraction engineering for silicon waveguide grating antenna by harnessing bound state in the continuum

Nanophotonics ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 1439-1446
Author(s):  
Hongnan Xu ◽  
Yaocheng Shi
Keyword(s):  
High Performance ◽  
Beam Steering ◽  
Side Wall ◽  
Bound State ◽  
Far Field ◽  
Propagation Length ◽  
Waveguide Grating ◽  
Silicon Waveguide ◽  
Waveguide Width ◽  
The Continuum

AbstractSilicon waveguide grating antennas (SWGAs) have been widely employed to interface the guided and radiation modes in various integrated photonic systems. However, ultrasmall feature sizes or heteromaterial integrations are usually required to obtain long propagation length and small far-field divergence. Moreover, for conventional SWGAs, the diffraction strength is wavelength sensitive, so the output power and far-field divergence will deviate in the beam steering process. In this paper, we propose and demonstrate a novel approach to engineer the diffraction in SWGA by harnessing the bound state in the continuum (BIC). A new degree of freedom is attained in diffraction engineering by introducing the “modified” diffraction formula. The side-wall emission can be dramatically depressed by building the quasi-BIC at critical waveguide width, leading to ultrauniform diffraction. The extremely weak diffraction strength (~3.3 × 10−3 dB/μm) has been experimentally realized for the fabricated device with a large feature size (~60 nm). From the measurement results, one can predict a centimeter-scale propagation length and an ultrasmall divergence (~0.027°). Moreover, the diffraction strength dispersion can be flattened for SWGA with critical waveguide width. Such effect has also been experimentally verified. Our proposed design is the first one that introduces the BIC effect into SWGA optimization, paving the way for precise diffraction engineering and high-performance integrated optical antennas.

Study on angle detection capability of silicon waveguide grating coupler

2018 ◽  
Author(s):  
Yang Gao ◽  
Yanfei Liu ◽  
Jiali Liao ◽  
Jun Xu ◽  
Zhanrong Zhou ◽  
...  
Keyword(s):  
Grating Coupler ◽  
Detection Capability ◽  
Waveguide Grating ◽  
Silicon Waveguide

scholarly journals Silicon waveguide grating coupler based on a segmented grating structure

2018 ◽  
Vol 57 (12) ◽  
pp. 3301 ◽  
Author(s):  
Jianxun Hong ◽  
Feng Qiu ◽  
Andrew M. Spring ◽  
Shiyoshi Yokoyama
Keyword(s):  
Grating Coupler ◽  
Waveguide Grating ◽  
Grating Structure ◽  
Silicon Waveguide ◽  
Segmented Grating

Silicon waveguide grating coupler for perfectly vertical fiber based on a tilted membrane structure

2016 ◽  
Vol 41 (4) ◽  
pp. 820 ◽  
Author(s):  
Liu Liu ◽  
Jianhao Zhang ◽  
Chenzhao Zhang ◽  
Siya Wang ◽  
Chichao Jin ◽  
...  
Keyword(s):  
Membrane Structure ◽  
Grating Coupler ◽  
Waveguide Grating ◽  
Silicon Waveguide

Recovery time for a silicon waveguide all-optical switch

1988 ◽  
Vol 24 (6) ◽  
pp. 303 ◽  
Author(s):  
P.D. Colbourne ◽  
P.E. Jessop
Keyword(s):  
Recovery Time ◽  
Optical Switch ◽  
Silicon Waveguide ◽  
All Optical ◽  
All Optical Switch

8-wavelength photonic integrated 2 × 2 WDM cross-connect switch using 2 × N phased-array waveguide grating (PAWG) multi/demultiplexers

1997 ◽  
Vol 33 (7) ◽  
pp. 592 ◽  
Author(s):  
Haifeng Li ◽  
Chau-Han Lee ◽  
Wenhua Lin ◽  
S. Didde ◽  
Ying-Jui Chen ◽  
...  
Keyword(s):  
Phased Array ◽  
Waveguide Grating ◽  
Cross Connect ◽  
Array Waveguide Grating
Sign in / Sign up

Export Citation Format

Share Document