Strategies for fabricating strong-confinement microring filters and circuits

Smith, Henry I.; Barwicz, Tymon; Holzwarth, Charles W.; Popović, Miloš A.; Watts, Michael R.; Rakich, Peter T.; Qi, Minghao; Barreto, Rafael R.; Kärtner, Franz X.; Ippen, Erich P.

doi:10.1109/ofc.2007.4348654

Cited by 4 publications

(2 citation statements)

References 8 publications

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“…To date multiple-order non-tunable ring filters have been demonstrated with extinction ratios of up to 70dB. Popovíc, Miloš A., et al [4] and Smith, Henry, et al [5] demonstrated high confinement silicon rich SixN4 third-order ring filters with 50dB and 60dB extinction ratios, respectively, and FSRs up to 2500GHz. Little, et al demonstrated 3 rd order filters with 50dB extinction ratio with 3dB bandwidth between 10-15GHz and 6 th order filters with extinction ratio on the order of 60dB [6,7], with a discretely tunable passband shape [8].…”

Section: Introductionmentioning

confidence: 99%

Demonstration of a chip-based optical isolator with parametric amplification

Hua¹,

Wen²,

Jiang³

et al. 2016

Nat Commun

119

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Despite being fundamentally challenging in integrated (nano)photonics, achieving chip-based light non-reciprocity becomes increasingly urgent in signal processing and optical communications. Because of material incompatibilities in conventional approaches based on the Faraday effect, alternative solutions have resorted to nonlinear processes to obtain one-way transmission. However, dynamic reciprocity in a recent theoretical analysis has pinned down the functionalities of these nonlinear isolators. To bypass such dynamic reciprocity, we here demonstrate an optical isolator on a silicon chip enforced by phase-matched parametric amplification in four-wave mixing. Using a high-Q microtoroid resonator, we realize highly non-reciprocal transport at the 1,550 nm wavelength when waves are injected from both directions in two different operating configurations. Our design, compatible with current complementary metal-oxide-semiconductor (CMOS) techniques, yields convincing isolation performance with sufficiently low insertion loss for a wide range of input power levels. Moreover, our work demonstrates the possibility of designing chip-based magnetic-free optical isolators for information processing and laser protection.

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Section: Introductionmentioning

confidence: 99%

Demonstration of a chip-based optical isolator with parametric amplification

Hua¹,

Wen²,

Jiang³

et al. 2016

Nat Commun

119

View full text Add to dashboard Cite

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“…Figure 1(a) depicts a second-order microring filter configuration, where the coupling coefficients κ 0,1 can be engineered to realize various filter responses, such as maximally flat and Chebyshev filters [6]. However, the small device size, high index contrast, and multi-ring configuration present a number of fabrication challengers, as the optical response of such filters is extremely sensitive to nanoscale dimensional deviations [7]. One of the crucial issues in high-order microring filters is the resonant-frequency mismatch between rings, which markedly reduces the filter performance [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Accurate frequency alignment in fabrication of high-order microring-resonator filters

et al. 2008

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Optical traps use the forces exerted by structured beams of light to confine and manipulate microscopic objects in three dimensions. A popular implementation involves structuring the trap-forming beam with computer-generated holograms before focusing it into traps with a high-numerical-aperture optical train. Here, we present a fully vectorial theory for the forces and torques exerted by such systems.

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