Improved Relations Describing Directional Control in Electromagnetic Wave Guidance

Marcatili, E. A. J.; Miller, S. E.

doi:10.1002/j.1538-7305.1969.tb01169.x

Cited by 105 publications

(30 citation statements)

References 1 publication

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“…This might be due to the fact that in the TMM approach, it is rather difficult to take care of all kind of losses, whereas in the FDTD method, losses are taken care during the simulation. Accurate numerical methods can help to evaluate precise coupling coefficients and losses in such MRR structures which have been used for the conventional MRR [32]- [34]. To achieve higher refractive index n eff2 of the inner ring, one should use a material with higher refractive index than that of the outermost ring.…”

Section: Theory Of Off-axis Microring Resonatormentioning

confidence: 99%

Theory and Design of Off-Axis Microring Resonators for High-Density On-Chip Photonic Applications

Haldar

Das

Varshney

2013

J. Lightwave Technol.

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In this paper, we have developed a theory of an off-axis microring resonator (MRR) with single and multiple off-axis rings. The off-axis inner ring introduces tunable extra notches with many striking features in the transmission spectrum which facilitates its use as efficient modulators and sensors. A few such notches when closely packed have been used to design a compact band rejection filter with improved bandwidth (>10 nm). Moreover, these closely packed extra notches achieved by serially coupled MRRs with offaxis inner rings are tunable to reject arbitrarily chosen WDM channels. Through numerical simulations, based on both transfer matrix method and finite difference time domain method, it has been examined that off-axis MRRs cater superior performances in comparison to the serially coupled conventional MRR with respect to the device size, faster response, and low dispersion. The proposed off-axis MRRs may be used for cluster to cluster interconnects and can have other potential on-chip photonic applications in network layer. Necessary design parameters are computed from the coupled mode theory.Index Terms-Add-drop filters, band rejection filters, high density photonic circuits, off-axis microring resonator, WDM.

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Section: Theory Of Off-axis Microring Resonatormentioning

confidence: 99%

Theory and Design of Off-Axis Microring Resonators for High-Density On-Chip Photonic Applications

Haldar

Das

Varshney

2013

J. Lightwave Technol.

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“…Power will gradually attenuate when light propagates through a bent waveguide. The pure bending loss of a circular waveguide is firstly derived by Marcatili and Miller: ( 1) where C 1 and C 2 are two constants depending on the waveguide structure and on the shape of optical mode [7,8], and R is the curvature radius. The transition loss is induced by a mode mismatch of a connection of two waveguides with different curvature radii.…”

Section: Insertion Loss Analysis Of S-shaped Bendsmentioning

confidence: 99%

Optimization of S-shaped Bend Waveguide Using Random Orthogonal Axial Gradient Method

Xiao¹,

Yang²,

Lu³

2015

Proceedings of the 3rd International Conference on Mechatronics and Industrial Informatics

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Abstract. S-shaped bend waveguides are indispensable in planar light circuits to realize the lateral displacements and connections. High-density integrated optical circuits require S-shaped bend waveguides to be low loss and compact sized. In this paper, the loss mechanism of the S-shaped bend is briefly analyzed first, and then a novel scheme to optimize the waveguide bends is proposed. Using a modified random direction method, the random orthogonal axial gradient method (ROAGM), the configuration curves of the S-shaped bends fitted by polynomials are optimized. Numerical results show that the insertion losses of the optimized configuration curves are much smaller than those of the conventional cosine functions when the space requirement is strict.

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“…Bend-loss: In our octilinear grid, bends can be either 90 • or 135 • , having different loss characteristics. Bend-loss is computed for each using Eqn.1 [39] as a function of radius of curvature:…”

Section: Table Imentioning

confidence: 99%

Channel routing for integrated optics

Condrat

Kalla

Blair

2013

2013 ACM/IEEE International Workshop on System Level Interconnect Prediction (SLIP)

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Abstract-Increasing scope and applications of integrated optics necessitates the development of automated techniques for physical design of optical systems. This paper presents an automated, planar channel routing technique for integrated optical waveguides. Integrated optics is a planar technology and lacks the inherent signal restoration capabilities of static-CMOS. Therefore, signal loss minimization-as a function of waveguide crossings and bends-is the primary objective of this technique. This is in contrast to track and wire-length minimization of traditional VLSI routing. Our optical channel router guarantees minimal waveguide crossings by drawing upon sorting-based techniques for waveguide routing. To further improve our solutions in terms of signal loss, we extend the router to reduce the number of bends produced during routing. Finally, we implement the optical channel routing technique and describe the experimental results, comparing the costs of routing solutions with respect to waveguide crossings, bends, and channel height.

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Improved Relations Describing Directional Control in Electromagnetic Wave Guidance

Cited by 105 publications

References 1 publication

Theory and Design of Off-Axis Microring Resonators for High-Density On-Chip Photonic Applications

Theory and Design of Off-Axis Microring Resonators for High-Density On-Chip Photonic Applications

Optimization of S-shaped Bend Waveguide Using Random Orthogonal Axial Gradient Method

Channel routing for integrated optics

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