Optimization of Pulley-Type Ring Resonator with Waveguide Offset

Yen, Meng Hua; Feng, Pei Yu; Lin, Chu En; Chen, Chii Chang; Chang, Jenq Yang

doi:10.3390/mi9050226

Cited by 4 publications

(4 citation statements)

References 26 publications

(29 reference statements)

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“…The bus waveguide, with a width of 1.3 μm, is coupled to the microrings using a pulley coupling at a 30° angle, with a coupling gap of 520 nm. The pulley coupling realizes mode selection, effectively preventing interference from other modes 34,35 .…”

Section: Chalcogenide Chip and Characterizationmentioning

confidence: 99%

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Cuffless Wearable Sphygmomanometers using Dual Digital Optical Frequency Combs in Chalcogenide Chips

Zhang,

Zhong,

Pan

et al. 2024

Preprint

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Sphygmomanometers often inflate a rubber cuff wrapped around the upper arm to measure blood pressure. However, the cuff is uncomfortable and inconvenient, making it highly desirable to develop cuffless sphygmomanometers for continuous monitoring of blood pressure in emergencies and healthcare. Electrical and optical blood pressure sensors provide high sensitivity but often suffer from limited pressure range, temperature drift, slow response and poor wearability. To address the aforementioned limitations, we design and demonstrate a unique cuffless wearable blood pressure sensor (dimensions of 12 mm x 2 mm x 0.5 mm) equipped with two original components: a GeSbS/AsS chalcogenide dual-microring chip as the pressure sensing unit for high sensitivity and wide pressure range, and a dual digital optical frequency comb (DDOFC) system as the detection unit for fast response and low-cost detection. Our sensor is comparable to reported electrical and optical blood pressure sensors in its detection limit (23 Pa) but has a 10-times faster response rate (2 kHz), a 1,000-times longer stable operation (> 4.3x10^7 cycles) and a well-compensated temperature drift (< 0.012 pm/°C) that eliminates the need for temperature control. Our work holds great promise for wearable electronics, mobile healthcare, and human-computer interactions. Moreover, its 2-kHz fast response would enable the capture of previously inaccessible transient details of cardiovascular conditions for critical applications such as in-surgery blood pressure monitoring, orthostatic hypotension studies and unexplored early detection of potential myocardial ischemia and strokes.

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Section: Chalcogenide Chip and Characterizationmentioning

confidence: 99%

“…2b). The pulley coupling between the two microrings and the bus waveguide, with a coupling angle of 30° and a coupling gap of 520 nm, provides high-efficiency optical coupling while suppressing higher-order modes 34,35 . The combined transmission spectrum of the two microrings (Fig.…”

Section: Design and Preparation Of The Chalcogenide Chipmentioning

confidence: 99%

Cuffless Wearable Sphygmomanometers using Dual Digital Optical Frequency Combs in Chalcogenide Chips

Zhang,

Zhong,

Pan

et al. 2024

Preprint

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“…Microring resonators (MRRs) are vital photonic components in the development of high-index silicon photonic platforms. It produces optical resonance by utilizing the constructive interference phenomenon from the interaction between propagated light in its waveguides [1][2][3]. The MRR waveguide consists of a ring and a straight waveguide that interact in the presence of light propagation, provided that the distance or gap between them is small, usually in micro or nanometer sizes [4,5].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Sensitivity of Microring Resonator-Based Sensors Using the Finite Difference Time Domain Method to Detect Glucose Levels for Diabetes Monitoring

et al. 2020

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The properties of light and its interaction with biological analytes have made it possible to design sophisticated and reliable optical-based biomedical sensors. In this paper, we report the simulation, design, and fabrication of microring resonator (MRR)-based sensors for the detection of diabetic glucose levels. Electron Beam Lithography (EBL) with 1:1 hydrogen silsesquioxane (HSQ) negative tone resist were used to fabricate MRR on a Silicon-on-Insulator (SOI) platform. Scanning Electron Microscopy (SEM) was then used to characterize the morphology of the MRR device. The full-width at half-maximum (FWHM) and quality factors of MRR were obtained by using a tunable laser source (TLS) and optical spectrum analyzer (OSA). In this paper, the three-dimensional Finite Difference Time Domain (3D FDTD) approach has been used to simulate the proposed design. The simulation results show an accurate approximation with the experimental results. Next, the sensitivity of MRR-based sensors to detect glucose levels is obtained. The sensitivity value for glucose level detection in the range 0% to 18% is 69.44 nm/RIU. This proved that our MRR design has a great potential as a sensor to detect diabetic glucose levels.

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“…Several researchers [8,9,10,11,12,13,14,15,16] have demonstrated the ring resonators or (disc resonator with hole is developed in center). It is noted that operating frequency, and design of resonator play an important role in the performance and improving the quality factor of resonators.…”

Section: Introductionmentioning

confidence: 99%

Concentric Split Aluminum with Silicon-Aluminum Nitride Annular Rings Resonators

Khan

Bao

et al. 2019

Micromachines

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This paper presents a novel approach of annular concentric split rings microelectromechanical resonators with tether configuration to reduce anchor loss and gives very high-quality factor (Q) 2.97 Million based on FEA (Finite Element Analysis) simulation. The operating frequencies of these resonators are 188.55 MHz to 188.62 MHz. When the proposed SR (square rectangle) hole shaped one dimensional phononic crystal (1D PnC), and two dimensional phononic crystal (2D PnC) structure consist of very wide and complete band gaps is applied to novel design rings MEMS resonators, the quality factor (Q) further improved to 19.7 Million and 1750 Million, respectively, by using the finite element method. It is also observed that band gaps become closer by reducing the value of filling fraction, and proposed SR PnC gives extensive peak attenuation. Moreover, harmonic response of ring resonator is verified by the perfect match layers (PML) technique surrounded by resonators with varying width 1.5λ, and 3λ effectively reduce the vibration displacement.

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Optimization of Pulley-Type Ring Resonator with Waveguide Offset

Cited by 4 publications

References 26 publications

Cuffless Wearable Sphygmomanometers using Dual Digital Optical Frequency Combs in Chalcogenide Chips

Cuffless Wearable Sphygmomanometers using Dual Digital Optical Frequency Combs in Chalcogenide Chips

Enhanced Sensitivity of Microring Resonator-Based Sensors Using the Finite Difference Time Domain Method to Detect Glucose Levels for Diabetes Monitoring

Concentric Split Aluminum with Silicon-Aluminum Nitride Annular Rings Resonators

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