Modeling of Ti:LiNbO/sub 3/ waveguide directional couplers

Bindal, Pushpa; Sharma, Anurag

doi:10.1109/68.145253

Cited by 6 publications

(2 citation statements)

References 10 publications

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“…In a recent work (Hammer and Ivanova 2009), the method, in its standard form (EIM) or in its improved version form (vEIM) has been applied to photonic crystal slab waveguides. We have shown in our earlier work that the equivalent waveguides obtained using the optimal variational method (Vopt) give very good results Bindal and Sharma 1992) for standard waveguiding structures. We adapt the same procedure for the photonic crystals slabs that we are considering here.…”

Section: Optimal Variational (Vopt) Methodsmentioning

confidence: 99%

Modelling of photonic crystal waveguides: a simple and accurate approach

Bindal

Sharma

2011

Opt Quant Electron

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We present an improved variational effective index method for reduction of 2-D Bragg grating problems to 1-D and show significant improvements particularly at smaller wavelengths. The method is based on the optimal variational (Vopt) method, which we have earlier used successfully for conventional waveguides. A 1-D transverse profile along with a longitudinal index variation are reduced to a 1-D longitudinal distribution, reflection and transmission spectra of which have been studied for both the TE and TM modes by transfer matrix methods. An accurate modeling for the out of plane scattering losses has been presented which occur when a guided wave propagating in a conventional waveguide impinges on a photonic crystal waveguide. Taking these losses into account brings the results pretty close to those of a rigorous 2-D Helmholtz solver QUEP, improving them remarkably over the variational EIM (vEIM) results.

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Section: Optimal Variational (Vopt) Methodsmentioning

confidence: 99%

Modelling of photonic crystal waveguides: a simple and accurate approach

Bindal

Sharma

2011

Opt Quant Electron

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“…Photonic integrated circuits (PICs) owing their low loss, compactivity and stability, have become a promising platform to realize photonic quantum interconnent. PICs have been demonstrated on different material platforms such as LiNO3, InP and SiN [3][4][5][6]. These waveguide materials with low refractive index contrasts are associated with large footprints and poor scalabilities.…”

Section: Introductionmentioning

confidence: 99%

Ultra-Compact and Ultra-Broadband Polarization-Insensitive Mach–Zehnder Interferometer in Silicon-on-Insulator Platform for Quantum Internet Application

Zhang

Ma³

et al. 2021

Photonics

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Polarization dependence in integrated silicon photonics has a detrimental effect on the manipulation of quantum state with different polarizations in the quantum technology. Those limits have profound implications for further technological developments, especially in quantum photonic internet. Here, we propose a polarization-independent Mach–Zehnder interferometer (MZI) structure based on a 340 nm-thick silicon-on-insulator (SOI) platform. The MZI facilitates low loss, broad operating bandwidth, and large tolerance of the fabrication imperfection. We achieve an excess loss of <10% and an extinction radio of >18 in the 100 nm bandwidth (1500∼1600 nm) for both transverse electric (TE) and transverse magnetic (TM) modes. We numerically demonstrate an interference visibility of 99% and a polarization-independent loss (PDL) of 0.03 for both polarizations at 1550 nm. Furthermore, by using the principle of phase compensation and self-image, we shorten the length of the waveguide taper by almost an order of magnitude with the transmission of >95% for both TE and TM polarizations. Up to now, the proposed structure could significantly improve the integration and promote the development of monolithic integrated quantum internet.

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Analysis of the eigenmodes of two coupled Ti: LiNbO3 optical waveguides and its application

Zhu

Wang

1994

Opt Quant Electron

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Modeling of Ti:LiNbO/sub 3/ waveguide directional couplers

Cited by 6 publications

References 10 publications

Modelling of photonic crystal waveguides: a simple and accurate approach

Modelling of photonic crystal waveguides: a simple and accurate approach

Ultra-Compact and Ultra-Broadband Polarization-Insensitive Mach–Zehnder Interferometer in Silicon-on-Insulator Platform for Quantum Internet Application

Analysis of the eigenmodes of two coupled Ti: LiNbO3 optical waveguides and its application

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