We compare the performance of silicon-based arrayed waveguide gratings (AWGs) with star couplers of Rowland and Confocal configurations, respectively, for both TE and TM polarizations.
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Arrayed waveguide gratings (AWG) are commonly used as optical (de)multiplexers in wavelength division multiplexed (WDM) systems. It is usually built as part of a planar lightwave circuit (photonic integrated circuit), where the light coming from an input fiber first enters a multimode. Component-level simulations using varFDTD are carried out for more realistic results. It is a very powerful integrated light-dispersion technology with sig-nificant exibility for tailoring its performance to the individual.
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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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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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Advanced optical communication systems, such as wavelength-division multiplexing (WDM) systems, rely on beam splitters to multiplex and demultiplex optical signals. The beam splitters used in these systems require high isolation and low crosstalk to ensure reliable data. a laser beam) into two (or sometimes more) beams, which may or may not have the same optical power (radiant flux). This seemingly simple device plays a crucial role in a wide variety of scientific and technological applications, ranging from interferometry and quantum computing to optical.
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