防塵式整合雷射遮斷之光纖轉接器設計參數與實驗研究

高功率雷射(>+21dBm)在光纖網路應用中因具有傳輸距離遠的特性，已日漸普遍應用於區域有線電視、光纖到戶、G-PON system等訊號傳輸網路中。然而用戶端的設備若不加以保護設計，很容易造成使用者被高功率雷射造成傷害(例如雷射直射到眼睛)。高功率遮斷式光纖轉接器使用金屬遮片阻絕雷射光直接照射到眼睛，因此漸漸取代傳統轉接器而成為市場主流。本研究以「彈-塑性」理論，結合參數式設計探討幾何對於初始回彈量的影響。受力數次穩定後之回彈角度量測值與模擬值獲得一致的結果。本研究結果說明遮光片厚度、設計初始角度、材料硬度與邊界條件等因素對於回彈角度有較大影響，這可作為設計時的控制參考。

關鍵字

高功率雷射；彈-塑性；光遮斷件；光轉接器

並列摘要

High power lasers (>+21dBm) have gradually become the common solution for signal transmitting systems including regional cable television, Fiber To The Home (FTTH), and gigabit passive optical networks (G-PONs) due to their ability to generate signals that can be transmitted over long distances. However, if protective design is not implemented in the facility at the client side, users may be exposed to health hazards such as eye damage from these high-power lasers. High-power optical adapters with laser shutter use metal masks to prevent eye exposure to direct laser beams. They have progressively replaced conventional optical adapters and entered the market mainstream. Our study uses the Elastic-Plastic theory together with parametric design to investigate the effect of geometry on the initial spring-back angle of a laser shutter. Once the force stabilizes, the angles of the initial spring back are found to be the same as the simulated results for several attempts. In our study, it is observed that factors including the thickness of the metal masking plate, the initial design angle, the stiffness of the material and the boundary conditions have significant influence on the spring back angle. These can be used as references in design control.

並列關鍵字

High power leaser ； Elastic-Plastic theory ； laser shutter ； optical adapter

參考文獻

[1].K. C. Kao and G. A. Hockham, " Dielectric - fibre surface waveguides for optical frequencies," Proc. IEE, vol. 133, pp. 1151-1158, 1966US patent, 2008/0310795, Dust cap for fiber optic adapter