REVIEW PAPER FOR DEVELOPMENTS IN ARRAY WAVEGUIDE GRATINGS

Lithium Niobate Array Waveguide Grating

Lithium Niobate Array Waveguide Grating

We design and fabricate an eight-channel thin-film lithium niobate (TFLN) arrayed-waveguide grating (AWG) and demonstrate the electro-optical tunability of the device. The transmission of the fabri-cated TFLN AWG near the central wavelength of 1550 nm is. Arrayed waveguide grating is a versatile and scalable integrated light dispersion device, which has been widely adopted in various applications, including, optical communications and optical sensing.

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Planar Optical Waveguide Technology

Planar Optical Waveguide Technology

Planar waveguides are optical waveguides with a planar geometry that confine light propagation to a single dimension. They are often fabricated in the form of a thin transparent film with increased refractive index on some substrate, or possibly embedded between two substrate layers. FIMMPROP is probably the most widely used propagation tool for the modelling of silicon photonics: rigorous (no slowly varying approximation), fully vectorial, offering wide angle capability and very high design flexibility.

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The role of small-diameter fiber gratings

The role of small-diameter fiber gratings

Researchers have gained enormous attention in the field of fiber Bragg grating (FBG)-based sensing due to its inherent advantages, such as small size, fast response, distributed sensing, and immunity to the electromagnetic field. The journey begins with the fundamental understanding of Fiber Bragg Gratings—a triumph of ingenuity where periodic variations in the refractive index within an optical fiber create a unique spectral pattern [2, 3]. This invention is a small diameter single-mode optical fiber that has optical gratings formed directly within its core through an intact, protective coating. Optical fiber grating technology serves as a foundational stone in modern communication and sensing systems.

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