自由空間等效單模光纖應用於光纖感測器Free Space Single-Mode Fibers and Fiber Components for Fiber Sensor Applications

專利類型

發明

專利國別 (專利申請國家)

美國

專利申請案號

13/973,495

專利證號

US 9,448,116 B2

專利獲證名稱

自由空間等效單模光纖應用於光纖感測器Free Space Single-Mode Fibers and Fiber Components for Fiber Sensor Applications

專利所屬機關 (申請機關)

財團法人國家實驗研究院

獲證日期

2016/09/20

技術說明

本發明提出以量測光纖或光纖元件等效光路，並加以補償的方式，使得每個光纖或光纖元件的特性如自由空間(Free Space)一般，以提昇光纖或光纖元件的複製性與穩定性。理論計算由繆勒-史托克矩陣(Muller-Stokes Matrix)偏光儀所得出的結果進行分析，再計算出光纖或光纖元件的等效瓊斯矩陣與轉成單位矩陣所需的補償。光纖或光纖元件的補償方式可加元件如可變延遲器(variable retarder)、半玻片(half-wave plate)等，或同等功能的極化控制器(polarization controller)。光纖或光纖元件的補償亦可不加元件如扭轉部份光纖製造等效的補償效應；或其它方式使得補償後的光纖或光纖元件等效光路為一單位矩陣(unit matrix)，如同自由空間一般。 此項創新不僅大幅提升光纖及光纖元件的複製性，亦可大幅加快使用光纖與光纖元件的光纖感測器(如光纖陀螺儀等)的光路優化模擬演算速度。 This invention revealed and demonstrated a method of measuring and deriving a Jones Matrix of a fiber or fiber component, and to compensate the fiber or fiber component such that the fiber or fiber component plus the compensated optical circuit act as if an Unitary Matrix free space condition. In this way, all compensated fibers or fiber components act the same no matter what their original conditions are. It greatly enhances the fiber or fiber component repeatability and stability throughout the fiber or fiber component production line. The compensated circuit for Unitary Matrix can be applied externally or internally. For the external approach, for example, compensators such as variable retarder and half-wave plate may be added, or equivalently polarization controllers may be employed. For the internal approach, no component is added, and the compensation is realized through fiber bending, twisting or other means at either or both ends of a fiber or fiber component.

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