In the paper, a simple formula, which is relationship between differential mode delay and refractive index profile in multi mode fibers, is given. 给出了多模光纤中微分模时延与折射率剖面分布间的简单关系;
Differential mode delay of step index-polymer optical fiber ( SI-POF ) and gradient index-polymer optical fiber ( GI-POF ) with various lengths is measured by the frequency-domain phase-shift technique. 采用频域相移法测量了不同长度的两种折射率分布塑料光纤:阶跃型塑料光纤(SIPOF)和渐变型塑料光纤(GIPOF)的微分模延迟曲线。
Due to the fact that the mode coupling and the mode-dependent loss can be neglected for short fibers, the measured values of the differential mode delay for the 1 m fibers agree well with the theoretical ones. 实验结果表明,由于短光纤可以忽略模式耦合和模式损耗,1m塑料光纤的微分模延迟测量值与理论计算值吻合得非常好。
Differential Mode Delay(DMD) in POF Measured by Frequency-Domain Phase-Shift Technique 塑料光纤微分模延迟的频域相移法研究
Relationship between differential mode delay and refractive index profile in multi mode fibers 多模光纤微分模时延与折射率剖面分布关系