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Study and Design of Spiral Bent Waveguide Configuration
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作者 ZENG Wen-hong LIAO Yun +2 位作者 SHI Shuang-jin QIU Qi LI Wei 《Semiconductor Photonics and Technology》 CAS 2007年第2期112-116,共5页
A new version of the scalar transverse electric(TE) wave equation in the bent waveguide is introduced. Then, TE polarized field in curved single-mode waveguides is analyzed by using the finite-difference beam propagat... A new version of the scalar transverse electric(TE) wave equation in the bent waveguide is introduced. Then, TE polarized field in curved single-mode waveguides is analyzed by using the finite-difference beam propagation method(FD-BPM). The bending loss in bent waveguides is gotten for the optical fields obtained from BPM and comparisons are made among losses of the waveguides with various curvature radiuses, refractive index differences and cross sections. Based on the results, the design of spiral bent waveguide configuration is proposed as follows: refractive index difference being of 0.007, both width and thickness of waveguides being of 6 μm, the curvature radius in the spiral centre being of 4 mm, and the bending loss coefficient of the designed spiral bent waveguide being of 0.302 3 dB/cm. 展开更多
关键词 finite differential beam propagation method transparent boundary condition effective index method bent waveguide
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Design of a Broadband E-Plane Power Combiner Based on Quarter-Arc Bent Rectangular Waveguides for Sub-THz and THz Wave
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作者 唐效频 杨梓强 +1 位作者 史宗君 兰峰 《Chinese Physics Letters》 SCIE CAS CSCD 2016年第8期135-138,共4页
A method of designing an E-plane power combiner composed of two quarter-arc bent rectangular waveguides is proposed for sub-THz and THz waves. The quarter-arc bent-waveguide power combiner has a simple geometry which ... A method of designing an E-plane power combiner composed of two quarter-arc bent rectangular waveguides is proposed for sub-THz and THz waves. The quarter-arc bent-waveguide power combiner has a simple geometry which is easy to design and fabricate. By HFSS codes, the physical mechanism and performance of the power combiner are analyzed, and the relationship between the output characteristics and the structure/operating parameters is given. Simulation results show that our power combiner is suitable for the combining of two equalpower and reversed-phase signals, the bandwidth of the combiner is wide and can be adjusted by the radius of the quarter-arc, and the isolation performance of the combiner can be improved by adding thin film resistive septa at the junction of two quarter-arc bent waveguides. Meanwhile, an approximate method based on the analytic geometrical analysis is given to design this power combiner for different frequency bands. 展开更多
关键词 of in is THZ Design of a Broadband E-Plane Power Combiner Based on Quarter-Arc bent Rectangular waveguides for Sub-THz and THz Wave for on
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A Construction of Beam Propagation Methods for Optical Waveguides
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作者 Xavier Antoine Pierre Dreyfuss Karim Ramdani 《Communications in Computational Physics》 SCIE 2009年第8期565-576,共12页
This paper presents a systematic method to derive Beam Propagation Models for optical waveguides.The technique is based on the use of the symbolic calculus rules for pseudodifferential operators.The cases of straight ... This paper presents a systematic method to derive Beam Propagation Models for optical waveguides.The technique is based on the use of the symbolic calculus rules for pseudodifferential operators.The cases of straight and bent optical waveguides are successively considered. 展开更多
关键词 bent waveguides Beam Propagation Method OPTICS
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