Improved supercontinuum generation through UV processing of highly nonlinear fibers

Autor:	Paul S. Westbrook, Jeffrey W. Nicholson, K.S. Feder, Andrew D. Yablon
Rok vydání:	2005
Předmět:	Materials science business.industry Nonlinear optics Graded-index fiber Atomic and Molecular Physics and Optics Supercontinuum Zero-dispersion wavelength Optics Fiber Bragg grating Optoelectronics Dispersion-shifted fiber business Refractive index Photonic-crystal fiber
Zdroj:	Journal of Lightwave Technology. 23:13-18
ISSN:	1558-2213 0733-8724
Popis:	We demonstrate that UV exposure of highly nonlinear, germano-silicate fibers can significantly broaden the infrared supercontinuum generated by femtosecond pulses in these fibers. Both simulations and measurements of the fiber chromatic dispersion show that UV-induced refractive index changes increase the waveguide dispersion by up to 5 ps/(nm-km) at 1570 nm and shift the dispersion zero by over 100 nm. We examine fibers with a range of UV exposure levels and show that the short wavelength edge of the supercontinuum can be continuously changed by more than 100 nm. We also show that the long wavelength edge is extended beyond that of the unexposed fiber. The resulting continuum spans from 0.85 to 2.6 /spl mu/m. Cutback measurements show that the supercontinuum in the exposed fiber is generated in as little as 1 cm of fiber. A nonlinear Schro/spl uml/dinger equation (NLSE) model of the supercontinuum generation in the nonlinear fiber shows that the short wavelength behavior of the continuum is primarily controlled by changes in the fiber dispersion caused by the UV-induced change in refractive index of the fiber core.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e1f005e20474b135992a7f1eb45d0030 https://doi.org/10.1109/jlt.2004.840361 Zobrazit plný text záznamu