求翻译：接着进入拉锥环节，由计算机控制高温火头的移动和拉锥平台的移动。为了进行熔融拉锥过程的监控，实现在线监测，从一根光纤注入光功率，并用光功率计监测直通臂和耦合臂两输出端口的功率比，直到分光比符合要求即可停止加热，退出火头，结束延时之后停止拉锥。是什么意思？

正在翻译，请等待...

Then enter the tapered part, computer-controlled movement of the mobile platform and tapered high-temperature flame. To monitor the process of fused biconical taper, online monitoring, from an optical fiber into the optical power, and monitoring of optical power meter straight power ratio of the cou