title: A hollow beam supercontinuum generation by the supermode superposition in a GeO2 doped triangular-core photonic crystal fiber.
abstract: A GeO2 doped triangular-core photonic-crystal fiber (PCF) is designed and fabricated to allow the generation of a hollow beam through a nonlinear-optical transformation by femtosecond pulses at 1040 nm from a high power Yb-doped PCF laser oscillator. The hollow beam supercontinuum is obtained at far field by adjusting incident light polarization to excite the high order supermode, behaving as a mode convertor. The supercontinuum ranging from 540 to 1540 nm is achieved with an average power of 1.04 W.
authors.affiliation: Wuhan National Laboratory of Optoelectronic, Huazhong University of Science and Technology, 430074 Wuhan, China.
authors.forename: Xin-ben
authors.initials: XB
authors.lastname: Zhang
authors.forename: Xian
authors.initials: X
authors.lastname: Zhu
authors.forename: Xiang
authors.initials: X
authors.lastname: Chen
authors.forename: Hai-qing
authors.initials: HQ
authors.lastname: Li
authors.forename: Jing-gang
authors.initials: JG
authors.lastname: Peng
authors.forename: Neng-li
authors.initials: NL
authors.lastname: Dai
authors.forename: Jin-yan
authors.initials: JY
authors.lastname: Li
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D005857:Germanium / Q000737:chemistry*; D007834:Lasers; D016062:Porosity; D012031:Refractometry / Q000295:instrumentation*
chemical_list: D005857:Germanium; C040516:germanium oxide