Coupled-mode theory of optical waveguides

Haus, H.A.; Huang, Wei‐Ping; Kawakami, Shigeki; Whitaker, N. A.

doi:10.1109/jlt.1987.1075416

Cited by 368 publications

(130 citation statements)

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“…The optical bending modes of the disk and the waveguide are calculated using a fullvectorial bending mode solver [14]. The computed fields are then substituted into the coupledmode equation to calculate the coupling coefficients [15], and Q-factors are extracted based on the coupling coefficients using Little's formulation [16]. Table 1 summarizes the optical properties of the resonators, and measured transmission spectra of an As 2 S 3 microdisk with a gap separation of ~ 800 nm between bus waveguide and microdisk is shown in Fig.…”

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confidence: 99%

Planar waveguide-coupled, high-index-contrast, high-Q resonators in chalcogenide glass for sensing

et al. 2008

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High-index-contrast, compact microdisk resonators in thermally evaporated As 2 S 3 and Ge 17 Sb 12 S 71 chalcogenide glass films are designed, fabricated using standard UV lithography and characterized. Our pulley coupler configuration demonstrates coupling of the resonators to monolithically integrated photonic wire waveguides without resorting to demanding fine-line lithography. Microdisk resonators in As 2 S 3 support whisperinggallery-mode with cavity quality factors (Q) exceeding 2 × 10 5 , the highest Q value reported in resonator structures in chalcogenide glasses to the best of our knowledge. We have successfully demonstrated a lab-on-a-chip prototype sensor device with the integration of our resonator with planar microfluidic systems. The sensor shows a refractive index sensitivity of 182 nm/RIU (refractive index unit) and a wavelength resolution of 0.1 pm through resonant peak fit. This corresponds to a refractive index detection limit of 8 × 10 -7 RIU at 1550 nm wavelength, which could be further improved

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confidence: 99%

Planar waveguide-coupled, high-index-contrast, high-Q resonators in chalcogenide glass for sensing

et al. 2008

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“…The properties of the directional coupler can also be described by using the semi−analytical coupled mode theory (CMT). The CMT can be used both in a less complicated scalar form [17][18][19] and in more complex vector form [20]. That method utilizes guided modes of the two−core struc− tures or modes of separated cores, i.e., modes of a single core fiber.…”

Section: Results Comparison For Two-core Fibersmentioning

confidence: 99%

Comparison of numerical methods for light propagating in fibers with high steps of refractive index

Zegadlo

Karpierz

2012

Opto-Electronics Review

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Fast development of complex structures like microstructural fibers, photonic nanowires or slot waveguides requires numerical tools to predict a light propagation. There are many works concerning weakly guided case, but the microstructural fibers need algorithm for a high step of the refractive index. In this paper, three approximate methods are compared. The comparison concerns a structure consisting of circular cores surrounded by cladding for different values of the refractive index steps. Application of these methods in chromatic dispersion case is also presented. It is shown that certain conditions prefer two dimensional scalar algorithms (based on approximated methods) than three dimensional ones. This allows us to implement more efficient and less complicated methods.

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“…The most common approach for analysis of waveguide Bragg gratings is the coupledmode theory [90][91][92][93], which is considered to allow a straight-forward and precise modeling of uniform and non-uniform Bragg gratings. It assumes an ideal waveguide whose electric field E t in transverse direction can be described by a superposition of p ideal modes with amplitudes A j , traveling in the +z-direction and B j , traveling in the −z-direction, namely…”

Section: Coupled-mode Theorymentioning

confidence: 99%