Flower core photonic crystal fibres for supercontinuum generation with low birefringent structure for biomedical imaging

• Published in: Journal of optics (New Delhi) 2023-06, Vol.52 (2), p.539-547
• Main Authors: Devika, V., Mani Rajan, M. S., Thenmozhi, H., Sharaf, A.
• Format: Article
• Language: English
• Subjects: Birefringence; Crystal fibers; Finite element method; Imaging techniques; Infrared spectra; Lasers; Medical imaging; Near infrared radiation; Nonlinearity; Optical Devices; Optical properties; Optics; Photonic crystals; Photonics; Physics; Physics and Astronomy; Research Article
• ISSN: 0972-8821; 0974-6900
• DOI: 10.1007/s12596-022-01002-y

We theoretically investigate a novel photonic crystal fibre (PCF) structure with flower core geometry, and its optical properties were studied. The growing interest in the Supercontinuum generation (SCG) phenomenon has led to steady progress; we present a new approach with a flower core structure to PCF design that combines high nonlinearity with a large effective mode area for SCG. This efficient fibre design can generate a highly coherent and extensive bandwidth SCG near-infrared spectrum for particular bioimaging applications. To the great extent of our knowledge, this is the first proposed design for SCG with a large core area of about 10–30 μm 2 range. This flower core PCF structures have a smaller petal-shaped arrangement at its centre in a circular fashion. The proposed PCF structure has high nonlinearity of 6.8 W −1  km −1 and birefringence of the order of 7.31 × 10 –8  ~ at 1550 nm. The proposed structure is validated using the finite element method (FEM). The supercontinuum generated using this model is nearly 330 nm of wavelength range 1452–1782 nm. It is beneficial in the field of bio-tissue imaging techniques.