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发明授权
CN107741244B 一种具有全保偏功能的M-Z干涉光路结构 有权 转让

一种具有全保偏功能的M-Z干涉光路结构
摘要：
本发明提出一种具有全保偏功能的M‑Z干涉光路结构，包括偏振分光装置、第一保偏中转装置、第一法拉第旋转镜、第二保偏中转装置、第二法拉第旋转镜、第一保偏耦合器。第一保偏中转装置包括第一端口、第二端口、第三端口，其中第一端口接收偏振分光装置输出的第一偏振光，第二端口与第一法拉第旋转镜相连，第三端口与第一保偏耦合器的第一端口相连。第二保偏中转装置包括第一端口、第二端口、第三端口，其中第一端口接收偏振分光装置输出的第二偏振光，第二端口与第二法拉第旋转镜相连，第三端口与第一保偏耦合器的第二端口相连。本发明适用于长距离分布式光纤传感，如用于光纤通信干线的监控，长距离周界、石油、天然气管线的安全性监控等领域。
摘要（英）：

The invention provides an M-Z interface light path structure with an all polarization function. The structure comprises a polarizing beam-splitting device, a first polarization-maintaining and transferring device, a first Faraday rotator mirror, a second polarization-maintaining and transferring device, a second Faraday rotator mirror and a first polarization-maintaining coupler; the first polarization-maintaining and transferring device comprises a first port, a second port and a third port, wherein the first port receives first polarized light outputted by the polarizing beam-splitting device, the second port is connected with the first Faraday rotator mirror, and the third port is connected with a first port of the first polarization-maintaining coupler; the second polarization-maintaining and transferring device comprises a first port, a second port and a third port, wherein the first port receives second polarized light outputted by the polarizing beam-splitting device, the secondport is connected with the second Faraday rotator mirror, and the third port is connected with a second port of the first polarization-maintaining coupler. The structure is suitable for long-distancedistributed fiber sensing, such as being used in the fields of fiber communication trunk monitoring, safety monitoring of a long-distance perimeter, petroleum, natural gas pipelines and the like.

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