Design of a novel star type photonic crystal fiber for mid-infrared supercontinuum generation

Numerical Analysis of Optical Properties Using Octagonal Shaped Ge15As15Se17Te53 Chalcogenide Photonic Crystal Fiber

“…Many works focus on the variety of geometric structures of cladding (star, triangular, hexagonal, circular, square, rectangular lattices, etc.) [8,11,15] or the variation in the size of air holes (hole diameters and distance between them), this helps the optical properties to be investigated in detail, thereby proposing many optimal structures. These structures have been shown to enhance SCG process performance.…”

“…As the best nonlinear medium for supercontinuum generation (SCG), PCFs have a wide range of applications in science and technology, including the fields of optical communication, ________ telecommunication, spectroscopy, medical, security, petrochemical industries biomedical sensing, and more [2,3]. During the past several decades, many attempts to improve the dispersion and nonlinear properties of silica-PCF include altering the cladding shape [5,6], modifying the structural parameters [7,8], or using highly nonlinear fluids to fill their hollow cores [5][6][7]. Even so, the SCG spectrum expansion based on these PCFs is still limited, making it difficult for application areas in the infrared range.…”

“…The unique combination of ChG's attractive optical properties (the high linear refractive index, high nonlinear refractive index, low phonon energy, and great optical transparency extending from the visible region to 20 μm [10] with the design flexibility of PCFs makes ChG-PCF an excellent nonlinear medium for SCG sources. A large amount of evidence, both theoretical and experimental, shows the great application potential of ChG PCF in the infrared (MIR) region, such as in the fields of biomedicine and pollution monitoring [8][9][10], because most molecules exhibit distinctive spectral fingerprints in this region for their differential vibrational absorption originating from chemical bonds or functional groups.…”

“…With a star arrangement of air holes in a hexagonal lattice, the paper [8] introduced two Ge11.5As24Se64.5-PCFs with flat dispersion, the dispersion interval of 71.42 and 36.31 ps/[nm.km]. Furthermore, the confinement loss is less than 2.30×10 −7 dB/km for PCF1 and 3.50×10 −2 dB/km for PCF2 in the wavelength range of 1000-6000 nm.…”

All fiber structured supercontinuum source based on graded-index multimode fiber

“…Compacted supercontinuum generation (SC) sources based on photonic crystal fiber (PCF) with controllable dispersion and nonlinear characteristics have experienced a rapid growth in the past few decades [1][2][3][4][5] and have been utilized for various applications including optical metrology, biomedical imaging, spectroscopy and optical sensing [6][7][8]. In order to obtain high power and enhance the wavelength of visible light contained in the SC, some researchers have applied the seven-core PCF [9,10] and tapered PCF [11,12] to generate the SC.…”