摘要
提出了以硅为基质、高折射率铋化合物作为纤芯的多固体芯集束型光子晶体光纤(PCF)。该类光纤利用全内反射型机制将传输光场约束在高折射率固体棒芯中,并能输出相同强度的光。通过数值模拟分析了集束六芯六角形和集束八芯四方形两种光子晶体光纤的有效模场面积和非线性系数随抽运波长以及纤芯直径的变化规律,证明了这种光纤同时具有等效的高非线性和大的有效模场面积的特性,可以用于实现高功率频率变换。
The novel cluster-solid-core photonic crystal fiber (PCF) is proposed, which is structured by the bismuth silicate glass cores with a higher refractive index and the fused silica base with a lower refractive index. In particular, the guiding is only localized in the cluster-solid-core region by the total internal reflection (TIR). While the same power output from each solid-core in the PCF can be obtained. The nonlinearity and the mode field area of the cluster-six-core PCF and the cluster-eight-core PCF versus the pump wavelength and the core diameter are discussed by numerical simulation. The results show that the novel PCF designs have the specialities of the equivalently higher nonlinearity and the effectively large mode-field area, and can offer a significant potential in high-power frequency transform.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2009年第3期658-662,共5页
Chinese Journal of Lasers
基金
国家973计划(2003CB314904
2006CB806002)
国家863计划(2007AA03Z447)
国家自然科学基金 (60678012)
高等学校博士学科点专项科研基金(20070056083
20070056073)
教育部科技重点项目(108032)
教育部新世纪优秀人才支持计划(NCET-07-0597)资助课题
关键词
材料
多芯光子晶体光纤
高非线性
有效模面积
高功率
Bismuth
Crystal atomic structure
Crystal whiskers
DC generators
Fibers
Fused silica
Laser pulses
Light refraction
Nonlinear optics
Photonic crystal fibers
Refractive index
Refractometers
Silica
Silicates
