Advanced Research in Optical Waveguides

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Optics and Lasers".

Deadline for manuscript submissions: 20 October 2024 | Viewed by 579

Special Issue Editor


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Guest Editor
Department of Photonics, National Cheng Kung University, No. 1 University Road, Tainan 701, Taiwan
Interests: silicon photonics; integrated optics; optical communications; quantum optics; quantum control
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Special Issue Information

Dear Colleagues,

Optical waveguides have redefined the way we manipulate and transmit light, playing a pivotal role in an array of applications, spanning telecommunications, quantum computing, integrated optics, and beyond. This Special Issue aims to connect leading researchers, scientists, and engineers, and offer them a platform to showcase their pioneering research, exchange insights, and present cutting-edge developments in the design, fabrication, characterization, and application of optical waveguides.

The scope of the Special Issue includes, but is not limited to, the following:

  • Novel Design and Fabrication Techniques: Explore innovative approaches in the design and fabrication of optical waveguides for enhanced light manipulation and signal control.
  • Integrated Photonics: Present advancements in the integration of optical waveguide devices, including modulators, switches, splitters, and resonators, for on-chip optical signal processing and communication.
  • Coupling Strategies: Present advancements in the integration of optical waveguide devices, focusing on novel coupling strategies for improved light coupling between waveguides and other photonic components.
  • Quantum Photonics: Showcase the role of optical waveguides in quantum information processing, quantum communication, and quantum-enhanced sensing.

Prof. Dr. Shuo-Yen Tseng
Guest Editor

Manuscript Submission Information

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Keywords

  • optical waveguides
  • waveguide couplers
  • integrated photonics
  • photonic devices
  • integrated optics
  • quantum photonics
  • waveguide fabrication techniques
  • coupling strategies
  • light coupling mechanisms

Published Papers (1 paper)

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Research

12 pages, 2450 KiB  
Article
Loop-Terminated Mach–Zehnder Interferometer Integrated with Functional Polymer for CO2 Gas Sensing
by Muhammad A. Butt
Appl. Sci. 2024, 14(11), 4714; https://doi.org/10.3390/app14114714 - 30 May 2024
Viewed by 340
Abstract
In this work, a numerical study on the loop-terminated Mach–Zehnder interferometer (LT-MZI) structure for CO2 gas sensing applications is carried out via the finite element method. The sensing arm is covered with a polyhexamethylene biguanide (PHMB) polymer which is highly receptive to [...] Read more.
In this work, a numerical study on the loop-terminated Mach–Zehnder interferometer (LT-MZI) structure for CO2 gas sensing applications is carried out via the finite element method. The sensing arm is covered with a polyhexamethylene biguanide (PHMB) polymer which is highly receptive to CO2 gas. The refractive index of the host material decreases due to the absorption of the CO2 gas resulting in a shift in the interference pattern of the LT-MZI structure. As a result, a redshift in the wavelength is observed in the transmission spectrum of the device. The sensitivity of the device is estimated at 7.63 pm/ppm, 34.46 pm/ppm, and 74.78 pm/ppm for the sensing arm lengths of 5 µm, 10 µm, and 15 µm, respectively. The sensitivity can be further enhanced, however, at the cost of the bigger footprint of the device. Utilizing the innovative sensor design, a comprehensive range of CO2 gas concentrations spanning from 0 to 524 ppm is effectively detected. This compact and highly sensitive device serves as a vital tool for monitoring indoor CO2 levels, fostering a healthier breathing environment for all occupants. Full article
(This article belongs to the Special Issue Advanced Research in Optical Waveguides)
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