2012/10/12 by Mohiudeen Azhar, G. K. L. Wong, Azhar, Mohiudeen +7
Engineering · Physics and Astronomy · #Advanced Fiber Laser Technologies #FOS: Physical sciences #Laser-Matter Interactions and Applications #Optics (physics.optics) #Photonic Crystal and Fiber Optics
paper · pdf · doi:10.48550/arxiv.1210.3482
openalex publication_date 2012/10/12 · openalex created_date 2022/09/03 · openalex updated_date 2026/07/28
The effective Kerr nonlinearity of hollow-core kagome-style photonic crystal\nfiber (PCF) filled with argon gas increases over 100 times when the pressure is\nincreased from 1 to 150 bar, reaching 15 % of that of bulk silica glass, while\nthe zero dispersion wavelength shifts from 300 to 900 nm. The group velocity\ndispersion of the system is uniquely pressure-tunable over a wide range while\navoiding Raman scattering : absent in noble gases and having an extremely high\noptical damage threshold. As a result, detailed and well controlled studies of\nnonlinear effects can be performed, in both normal and anomalous dispersion\nregimes, using only a fixed-frequency pump laser. For example, the absence of\nRaman scattering permits clean observation, at high powers, of the interaction\nbetween a modulational instability side-band and a soliton created dispersive\nwave. Excellent agreement is obtained between numerical simulations and\nexperimental results. The system has great potential for the realisation of\nreconfigurable supercontinuum sources, wavelength convertors and short-pulse\nlaser systems.\n