The design of low-loss curved waveguides

Sheehan, Robert; Horne, Steven M.; Peters, Frank

doi:10.1007/s11082-009-9329-7

Cited by 15 publications

(5 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These transition losses are inversely proportional to the square of the radius of curvature, ROC 2 [49]. Bends with decreasing ROC at intersections to straight waveguide sections [50] or bend-offsets [51] reduce these mode conversion losses while keeping the effective bend radius, i.e., the space required for a low-loss bend, almost unaffected. In this work, we characterize waveguides with circular bends only in order to determine the minimum bend radius.…”

Section: Bendsmentioning

confidence: 99%

Broadband Terahertz Photonic Integrated Circuit with Integrated Active Photonic Devices

2021

View full text Add to dashboard Cite

Present-day photonic terahertz (100 GHz–10 THz) systems offer dynamic ranges beyond 100 dB and frequency coverage beyond 4 THz. They yet predominantly employ free-space Terahertz propagation, lacking integration depth and miniaturisation capabilities without sacrificing their extreme frequency coverage. In this work, we present a high resistivity silicon-on-insulator-based multimodal waveguide topology including active components (e.g., THz receivers) as well as passive components (couplers/splitters, bends, resonators) investigated over a frequency range of 0.5–1.6 THz. The waveguides have a single mode bandwidth between 0.5–0.75 THz; however, above 1 THz, these waveguides can be operated in the overmoded regime offering lower loss than commonly implemented hollow metal waveguides, operated in the fundamental mode. Supported by quartz and polyethylene substrates, the platform for Terahertz photonic integrated circuits (Tera-PICs) is mechanically stable and easily integrable. Additionally, we demonstrate several key components for Tera-PICs: low loss bends with radii ∼2 mm, a Vivaldi antenna-based efficient near-field coupling to active devices, a 3-dB splitter and a filter based on a whispering gallery mode resonator.

show abstract

Section: Bendsmentioning

confidence: 99%

Broadband Terahertz Photonic Integrated Circuit with Integrated Active Photonic Devices

2021

View full text Add to dashboard Cite

show abstract

“…It has been shown that in the study of curved waveguides, a conformal transformation may be applied to the waveguide which results in the addition of a linear term to the refractive index [56][57][58][59]. This is illustrated for a waveguide with constant index of refraction in Fig 2 . FIG.…”

Section: Fig 1: Local Bending Radius Of a Curvementioning

confidence: 99%

A Supersymmetric Approach to the Problem of Micro-bending Attenuation in Optical Waveguides

Ward,

Allahverdi,

Mafi

2021

Preprint

View full text Add to dashboard Cite

“…Low-loss curved waveguides can be achieved by introducing non-linear curvatures [11]. However, if all the arrayed waveguides exhibit different nonlinear bends, the phase errors introduced by small bending radii can reach significant levels.…”

Section: The Identical-bend Designmentioning

confidence: 99%

Improved arrayed-waveguide-grating layout avoiding systematic phase errors

Ismail¹,

Sun²,

Sengo³

et al. 2011

Opt. Express

View full text Add to dashboard Cite

Abstract:We present a detailed description of an improved arrayedwaveguide-grating (AWG) layout for both, low and high diffraction orders. The novel layout presents identical bends across the entire array; in this way systematic phase errors arising from different bends that are inherent to conventional AWG designs are completely eliminated. In addition, for highorder AWGs our design results in more than 50% reduction of the occupied area on the wafer. We present an experimental characterization of a loworder device fabricated according to this geometry. The device has a resolution of 5.5 nm, low intrinsic losses (< 2 dB) in the wavelength region of interest for the application, and is polarization insensitive over a wide spectral range of 215 nm. Lourdudoss, and S. J. B. Yoo, "InP-based arrayed-waveguide grating with a channel spacing of 10 GHz," in

show abstract

The design of low-loss curved waveguides

Cited by 15 publications

References 6 publications

Broadband Terahertz Photonic Integrated Circuit with Integrated Active Photonic Devices

Broadband Terahertz Photonic Integrated Circuit with Integrated Active Photonic Devices

A Supersymmetric Approach to the Problem of Micro-bending Attenuation in Optical Waveguides

Improved arrayed-waveguide-grating layout avoiding systematic phase errors

Contact Info

Product

Resources

About