Fabrication and characterization of high order filter based on resonance in hybrid multi-knots microfiber structure

Nodehi, S.; Mohammed, Waleed S.; Ahmad, Harith; Harun, Sulaiman Wadi

doi:10.1016/j.optlastec.2015.10.016

Cited by 9 publications

(1 citation statement)

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“…appropriate design parameters, such as the knot diameter and the coupling strength of the intertwisted area. Although most of MKR devices and sensors include a single knot, a number of papers incorporating multi-knot resonators have been reported [11][12][13][14][15][16][17]. In this paper, a multi-knot building block is investigated: the nested multiple coupled-knots resonator (NMCKR), shown in figure 1(a).…”

Section: Introductionmentioning

confidence: 99%

Periodic optical filter based on high-Q nested multiple coupled-knots resonator

Yi¹,

Zhao²,

Jiang³

et al. 2022

J. Opt.

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A periodic optical filter based on nested knots resonator structure is proposed. The structure consists of a knot resonator with a number of smaller coupled-knot-resonators nested in it, similarly to a dual-bus coupled ring resonator, where the end bus terminations are connected to form a Mach-Zehnder interferometer. The variation of periodical transmission output is shown to be mainly due to the change of field components that results in constructive or destructive interference between the nested multiple coupled-knots and the outer loop. The coupling matrix formalism is used to investigate the influence of the number of coupled-knots and their coupling coefficient on the transmission spectrum. The theoretical result shows that the temperature effect can be eliminated by immersing the resonator in ethanol solution. The output spectrum from a fabricated sample with high-Q is also presented. The device is capable of generating a periodical spectral filtering response and has potential applications as a filter or interleaver.

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