Horizontal slot waveguides for polarization branching control

Cheng, Nai-Chia; Ma, Yao-Feng; Fu, Po‐Han; Chin, Chun-Chieh; Huang, Ding‐Wei

doi:10.1364/ao.54.000436

Cited by 25 publications

(19 citation statements)

References 28 publications

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“…Therefore, a more compact PBS should be obtained by increasing the thickness of the inner silica-layer. However, a thicker slot-layer can cause the weaker confinement of the optical mode, and larger field at the dielectric interfaces will increase the propagation loss of the horizontal triple-slot waveguide [28]. In this case, the slot thickness, s = 50 nm, is chosen to balance the propagation loss and the coupling length.…”

Section: Resultsmentioning

confidence: 99%

“…By careful design optimization, it is shown here that a fabrication-tolerant PBS with a compact length of 33 μm can be achieved using a novel horizontal triple-slot waveguides based structure. It can be noted that the length of our proposed PBS is only half and one-seventh length of the conventional horizontal single-slot waveguides [28] and multipleslot waveguides [29] based PBSs, respectively. Besides that, simulations also show that, the fabrication tolerances can be improved substantially.…”

Section: Introductionmentioning

confidence: 99%

“…Instead of a vertical slot waveguide, a horizontal slot waveguide based PBS just needs to deposit different thicknesses for the vertical layers and then normally etch the waveguide [27]. A PBS has been reported to obtain an ER of > 20 dB by using two horizontal single-slot waveguides [28]. But, this PBS suffers from a long coupling-length of 65.87 μm and tight fabrication tolerance.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Compact and fabrication-tolerant polarization splitter based on horizontal triple-slot waveguide

2017

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A compact and fabrication-tolerant polarization beam splitter (PBS) based on the horizontal triple-slot waveguides is proposed and optimized by using the rigorous H-field-based full-vectorial finite element method and the least-squares boundary residual method. It can be noted from the simulation results that a fabrication-tolerant PBS with a compact length of 33 μm can be yielded based on the horizontal triple-slot waveguides. The polarization extinction ratios are -21.8 and -20.3 dB at 1.55 μm wavelength for the quasi-TE and quasi-TM modes, respectively. The 1 dB bandwidth is 100 nm for both the polarizations. The fabrication tolerances are also thoroughly calculated for the proposed PBS.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Compact and fabrication-tolerant polarization splitter based on horizontal triple-slot waveguide

2017

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“…One solution is to use polarization diversity schemes where polarization splitting and rotating devices are needed, which increases system size and complexity. Another approach is to make the directional coupler inherently polarization insensitive [52][53][54].…”

Section: Polarization-independent Directional Couplersmentioning

confidence: 99%

1D Photonic Crystals: Principles and Applications in Silicon Photonics

Han¹

2018

Theoretical Foundations and Application of Photonic Crystals

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One-dimension (1D) photonic crystals have been widely used in silicon photonics due to its simple structure and multiple working regimes: diffraction, Bragg reflection, and subwavelength regimes. Thanks to recent development of photonic technologies and highresolution lithography, many 1D photonic crystal-assisted silicon integrated devices have been proposed and demonstrated to further increase integration density and improve device performance. This chapter first presents some fundamentals of 1D photonic crystals. An overview of the applications of 1D photonic crystals in silicon photonics is then given including grating couplers, waveguide crossings, multimode interference couplers, polarization-independent directional couplers, hybrid lasers, polarizers, and high-order mode filters, among others. Particular attention is paid to providing insight into the design strategies for these devices.

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“…This enables high interaction between a low-index material and guided light, which may lead to the implementation of compact and high-performance photonic components such as resonators [18] and polarization beam splitters [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%