摘要
超长周期光纤光栅(ULPFG)是一种新型的周期长达几毫米的带阻型光纤器件,以ULPFG为元件的相关器件已用于多参数感测。基于模式耦合理论和简化的单模光纤三层模型,提出了一种在单模光纤中写制的ULPFG传输谱特性的数值模拟方法。数值模拟过程中使用线性插值简化了计算,模拟计算得到的ULPFG光谱谐振峰波长与已报道的实验结果相符,验证了该方法的有效性和近似处理的合理性。
A ultra long period fiber grating (ULPFG) is a novel band-rejection fiber device with periods up to several millimeters. Some related devices have been used in measurement of multi-parameter, but it's reported very few on how to simulate its transmission spectrum properties. On the base of coupled-mode theory and simplified three-layered model, a numerical method is proposed to simulate the transmission of the ULPFG written in single mode fiber and the linear interpolation is used to simplify the calculation. By using this algorithm, the calculation resonant wavelengths generally agree with the experimental results previously reported, which verifying the validity and reasonability of the algorithm and theory basis and effective analysis method for the witting providing ULPFG.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2009年第3期672-676,共5页
Chinese Journal of Lasers
基金
国家自然科学基金(10674075
60577018)
国家863计划(2006AA01Z217)资助课题
关键词
光纤光学
超长周期光纤光栅
传输谱
数值模拟
Computer simulation
Fiber Bragg gratings
Fiber lasers
Fibers
Mathematical models
Optical materials
Optoelectronic devices
Single mode fibers
Unsteady flow
