谐振式空心光子带隙光纤陀螺中的光克尔效应

谐振式光纤陀螺(PROG)采用空心光子带隙(HCPBG)光纤后,光克尔效应引入的系统漂移将会与普通单模光纤(SMF)谐振式陀螺系统中的有所不同。为了研究谐振式空心光子带隙光纤陀螺中光克尔效应的变化情况,采用光场叠加的方法,从理论上分析谐振式空心光子带隙光纤陀螺中的光克尔效应,同时针对光克尔效应引入的系统漂移进行了数值仿真,并且与普通单模光纤谐振腔陀螺中的光克尔效应进行对比。理论计算表明,采用空心光子带隙光纤的谐振式光纤陀螺比采用普通单模光纤谐振式陀螺的光克尔效应有明显的降低,在光源线宽不变时,不同光纤环长度对应的光克尔效应引起的旋转角速度漂移前者比后者降低了1~2个数量级。

Kerr Effect in an Optical Passive Ring-Resonator Gyro Using a Hollow-Core Photonic Band-Gap Fiber

The rotation rate drift induced by optical Kerr effect in passive ring-resonator optical fiber gyroscope (PROG) using hollow-core photonic band-gap (HCPBG) fiber is different from that in the conventional single mode passive ring-resonator optical fiber gyroscope. To study the rotation rate drift induced by Kerr effect in the PROG system above, optical Kerr effect in the passive ring-resonator optical fiber gyroscope made from hollow-core photonic band-gap fiber is analyzed theoretically using a simple optical field overlap method, meanwhile, the numerical calculation is developed to study the system drift caused by Kerr effect. And it is compared with the Kerr effect of the passive ring-resonator optical fiber gyroscope made from conventional fiber. The theoretical evidence shows that optical Kerr effect induced by rotation rate shift in PROG made from hollow-core PBG fiber is reduced by 1～2 orders at different fiber loop lengths than that caused by ring-resonator optical fiber gyroscope made from conventional fiber when the spectral width optical source is fixed.