title: High efficiency supercontinuum generation using ultra-long Raman fiber cavities.
abstract: Supercontinuum generation in a multi-fiber ultra-long Raman fiber laser cavity is experimentally investigated for the first time. We demonstrate significantly enhanced spectral flatness and supercontinuum generation efficiency using only conventional single mode silica fiber. With a pump power of only 1.63W a approximately 15 dB bandwidth >260 nm wide (from 1440 to >1700 nm) supercontinuum source is reported with a flatness of <1 dB over 180 nm using an optimised hybrid TW/HNLF cavity. We address the dependence of the supercontinuum spectrum on the input pump power and ultra-long Raman cavity.
authors.affiliation: Photonics Research Group Aston University, Birmingham, B4 7ET, UK. eltaheae@aston.ac.uk
authors.forename: Atalla E
authors.initials: AE
authors.lastname: El-Taher
authors.forename: Juan D
authors.initials: JD
authors.lastname: Ania-Castañón
authors.forename: Vassilis
authors.initials: V
authors.lastname: Karalekas
authors.forename: Paul
authors.initials: P
authors.lastname: Harper
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D055096:Optical Devices; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013059:Spectrum Analysis, Raman / Q000295:instrumentation*