Open AccessFive-order SRSs and supercontinuum generation from a tapered tellurite microstructured fiber with longitudinally varying dispersion
Author(s) -
Meisong Liao,
Xin Yan,
Weiqing Gao,
Zhongchao Duan,
Guanshi Qin,
Takenobu Suzuki,
Yasutake Ohishi
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.015389
Subject(s) - supercontinuum , materials science , optics , self phase modulation , cross phase modulation , photonic crystal fiber , dispersion (optics) , fiber laser , fiber , optical fiber , nonlinear optics , phase modulation , optoelectronics , laser , phase noise , physics , composite material
We try to obtain stable supercontinuum (SC) generation with broad bandwidth under relative simple pump conditions. We use a 1.3-m-long highly nonlinear tellurite microstructured fiber and pump it by a 15 ps 1064 nm fiber laser. One segment of the fiber is tapered from a core diameter of 3.4 μm to 1.3 μm. For the first time five-order stimulated Raman scatterings (SRSs) are observed for soft glass fibers. SC covering 730-1700 nm is demonstrated with the pump-pulse-energy of several nJ. The mechanisms of SC broadening are mainly SRS, self-phase modulation (SPM) and cross phase modulation (XPM). The tapered segment has two advantages. Firstly it increases the nonlinearity of fiber by several times. Secondly, it acts as a compensation for the dispersion of the untapered segment, and mitigates the walk-off between pump pulse and SRS peaks.