倒锥透镜型光纤端的出射光场性质

Properties of output optical field produced by upside-down taper lens fiber end

倒锥透镜型光纤端系经过特殊技术加工而成。本文用二阶统计相关函数,采用单色相干光源,计算了倒锥透镜型光纤端的光场分布及其统计相关性质,并与平端的情况作了对比。在实验上,用He-Ne激光作为单色相干光源,对理论进行了验证。

The upside-down taper lens fiber end is produced by the special technique. This new type optical fiber end can be used to make varied optical devices. By using single-colour coherent light source and the second-order statistical correlation function, the optical field statistical correlation properties and the optical intensity distribution formed by the upside-down taper lens fiber end are calculated. The similar results of the general cut fiber end are given for comparison with the upside-down taper lens fiber end. The theroetical results are tested and verified using He-Ne laser as the single-colour coherent light source in experiment.