Open AccessMid-infrared supercontinuum generation using low peak pump power in As38Se62 based chalcogenide photonic crystal fiber
Author(s) -
Sameer Vyas,
Sha Shiong Ng,
Ajai Kumar,
Gajendra Sharma,
Jaiverdhan,
Vinay Kumar Chandna,
Ghanshyam Singh
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1119/1/012022
Subject(s) - supercontinuum , chalcogenide , materials science , photonic crystal fiber , optics , chalcogenide glass , dispersion (optics) , optical coherence tomography , wavelength , refractive index , infrared , zero dispersion wavelength , optoelectronics , optical fiber , dispersion shifted fiber , physics , fiber optic sensor
A supercontinuum (SC) based chalcogenide As 38 Se 62 PCF for broadband mid-infrared light source is numerically reported. For the computational studies, the design of the proposed structure is made up of three rings of air holes with circular and elliptical shapes. The proposed structure provides excellent nonlinear coefficient and dispersion optimization. For the analysis, the finite difference frequency domain (FDFD) method is employed. Due to the high nonlinear refractive index and optimizing design of As 38 Se 62 chalcogenide glass, an effective mode area of 40.5972 μm 2 is obtained. The dispersion characteristic of the proposed structure has a zero-dispersion wavelength at 3.89 μm. The nonlinear coefficient is 761 W -1 km -1 at the wavelength of 4 μm. Dispersion is almost flat from 2 μm up to 10 μm. The supercontinuum spectrum calculated ranges from 2 μm to 9 μm. The presented structure is appropriate for medical imaging, optical coherence tomography and optical communications.