title: Design of a Bragg fiber with large mode area for mid-infrared applications.
abstract: The design of an all-solid, soft glass-based, large mode area Bragg fiber for effective single mode operation with mode effective area exceeding 1100 µm(2) across the wavelength range of 2-4 μm is reported. The design adopts a new strategy to induce large differential loss between the fundamental and higher order modes for effective single-mode operation within few tens of centimetres length of an otherwise multimode fiber. In addition to having the potential for the targeted application in high power laser delivery systems; complemented by a zero dispersion wavelength at 2.04 µm and rapidly developing mid-IR optical sources, the proposed fiber should also be attractive for generation of high power, single mode and less divergent supercontinuum light over this mid-IR window.
authors: Indian Institute of Technology Delhi, Hauz Khas, New Delhi – 110016, India. somiit@rediffmail.com
authors: Somnath
authors: S
authors: Ghosh
authors: Sonali
authors: S
authors: Dasgupta
authors: Ravi K
authors: RK
authors: Varshney
authors: David J
authors: DJ
authors: Richardson
authors: Bishnu P
authors: BP
authors: Pal