A new pentagon polarization maintaining photonic crystal fibre with low nonlinearity is introduced. The full vector finite element method was used to investigate the distribution and the effective area of modal field,...A new pentagon polarization maintaining photonic crystal fibre with low nonlinearity is introduced. The full vector finite element method was used to investigate the distribution and the effective area of modal field, the nonlinear properties, the effective indices of two orthogonal polarization modes and the birefringence of the new PM-PCF effectively. It is found that the birefringence of the new polarization maintaining photonic crystal fibre can easily achieve the order of 10-4, and it can obtain higher birefringence, larger effectively mode-field area and lower nonlinearity than traditional hexagonal polarization maintaining photonic crystal fibre with the same hole pitch, same hole diameter, and same ring number. It is important for sensing and communication applications, especially has potential application for fibre optical gyroscope.展开更多
We demonstrated an in-line micro fiber-optic Fabry-Perot interferometer with an air cavity which was created by multi-step fusion splicing a muti-mode photonic crystal fiber （MPCF） to a standard single mode fiber （...We demonstrated an in-line micro fiber-optic Fabry-Perot interferometer with an air cavity which was created by multi-step fusion splicing a muti-mode photonic crystal fiber （MPCF） to a standard single mode fiber （SMF）. The fringe visibility of the interference pattern was up to 20 dB by reshaping the air cavity. Experimental results showed that such a device could be used as a highly sensitive strain sensor with the sensitivity of 4.5 pm/με. Moreover, it offered some other outstanding advantages, such as the extremely compact structure, easy fabrication, low cost, and high accuracy.展开更多
针对空间辐照带来的光功率衰减和卫星轨道周期带来的周期性温变效应,基于光子晶体光纤单一材料特点带来的抗辐照和弱温度敏感特性,提出开展空间用高精度光子晶体光纤陀螺技术研究。通过设计实芯光子晶体光纤结构,完成损耗<1.5 d B/k...针对空间辐照带来的光功率衰减和卫星轨道周期带来的周期性温变效应,基于光子晶体光纤单一材料特点带来的抗辐照和弱温度敏感特性,提出开展空间用高精度光子晶体光纤陀螺技术研究。通过设计实芯光子晶体光纤结构,完成损耗<1.5 d B/km、偏振串音<-24 d B/km和直径135μm的光子晶体光纤技术验证,并采用八极对称绕制技术完成3800 m光子晶体光纤环的绕制及性能测试,实现零偏稳定性优于0.001°/h、随机游走系数优于0.00016°√h的技术指标。同时结合空间应用的实际需求,开展了可靠性试验,并完成3斜装构形光子晶体光纤陀螺组件的研制,并于2020年12月22日发射入轨,评估精度与地面测试结果相当,产品运行稳定,性能优异。展开更多
基金supported by the Specific Scientific and Technological Cooperation between China and Russia (Grant No.2010DFR80140)
文摘A new pentagon polarization maintaining photonic crystal fibre with low nonlinearity is introduced. The full vector finite element method was used to investigate the distribution and the effective area of modal field, the nonlinear properties, the effective indices of two orthogonal polarization modes and the birefringence of the new PM-PCF effectively. It is found that the birefringence of the new polarization maintaining photonic crystal fibre can easily achieve the order of 10-4, and it can obtain higher birefringence, larger effectively mode-field area and lower nonlinearity than traditional hexagonal polarization maintaining photonic crystal fibre with the same hole pitch, same hole diameter, and same ring number. It is important for sensing and communication applications, especially has potential application for fibre optical gyroscope.
基金This work is supported by the Nature Science Foundation Project of CQ CSTC under Grant No.cstc2012jjA4007. Assistances and good suggestions of Associate Prof. M. Deng in Chongqing University are appreciated.
文摘We demonstrated an in-line micro fiber-optic Fabry-Perot interferometer with an air cavity which was created by multi-step fusion splicing a muti-mode photonic crystal fiber （MPCF） to a standard single mode fiber （SMF）. The fringe visibility of the interference pattern was up to 20 dB by reshaping the air cavity. Experimental results showed that such a device could be used as a highly sensitive strain sensor with the sensitivity of 4.5 pm/με. Moreover, it offered some other outstanding advantages, such as the extremely compact structure, easy fabrication, low cost, and high accuracy.
文摘针对空间辐照带来的光功率衰减和卫星轨道周期带来的周期性温变效应,基于光子晶体光纤单一材料特点带来的抗辐照和弱温度敏感特性,提出开展空间用高精度光子晶体光纤陀螺技术研究。通过设计实芯光子晶体光纤结构,完成损耗<1.5 d B/km、偏振串音<-24 d B/km和直径135μm的光子晶体光纤技术验证,并采用八极对称绕制技术完成3800 m光子晶体光纤环的绕制及性能测试,实现零偏稳定性优于0.001°/h、随机游走系数优于0.00016°√h的技术指标。同时结合空间应用的实际需求,开展了可靠性试验,并完成3斜装构形光子晶体光纤陀螺组件的研制,并于2020年12月22日发射入轨,评估精度与地面测试结果相当,产品运行稳定,性能优异。
