Abstract
側磨光纖可以應用在許多光纖光學元件的製作，例如可調式光纖偶合器， 光纖濾波器，及光纖雷射等等，因為其光廣泛的應用， 在本論文中我們分析，製作，並量測側磨光纖。 我們使用矽晶片為研磨基板，於晶片上作出 V 型凹槽，將光纖置入凹槽中以膠水固定，溝槽的設計使用 CAD軟體，然後以微電子技術在晶片上製作出 V型凹槽。為了解側磨光纖的特性， 我們作了數值計算估計其，依此我們設計側磨光纖的幾何參數，光纖的研磨是使用自行設計的研磨機，高品質之側磨光纖成功地被製作出。在研磨面上滴上折射率高於光纖傳播模之有效折射率之液體，殼層中之消逝場會散逸到非波導結構之外加液體中。光纖中之場強度分佈與波長有關，故滴上液體之側磨光纖之衰減值亦是波長之函數，我們使用一可調波長的鈦: 藍寶石雷射研究 830nm 側磨光纖之特性， 側磨光纖之色散關係以三種不同之液體表示，其重要參數: 有效作用長度及研磨深度可以由此獲得。我們的實驗結果與理論預測有良好的吻合度，有效作用長度長達 6mm。建議的後續工作包含研磨機的改良及，鈦: 藍寶石雷射在光纖光學上之其他應用。Side-polished fibers have found many applications infiber-optic components.Tunable fiber couplers, fiber filters,fiber lasers were examples. Because of their usefulapplications, they were analyzed, made and calibrated in thisthesis. Here, we used Si wafers as the polishing substrates.V-grooves were formed on the wafers and fibers were firmlyembedded in them by epoxy. The grooves were designed byusing CAD tools. Grooves were made on thewafers by micro-electronic techniques. To understand theproperties of the side-polished fibers, numericalcalculations were made. The geometries of side-polished fibers were designed accordingly. Fibers werepolished using a home-made polisher. High performance 830-nmside-polished fibers were successfully made. By adding aliquid with a refractive index higher than the effectivemode index on the polished region, evanescent field leakout to the unbounded liquid. The field intensity profileof a fiber is a function of wavelength. Thus, theattenuation of a liquid-cladded side-polished fiber iswavelength dependent. By using a tunable Ti: sapphire laseras the light source, we studied thecharacteristics of 830-nm side-polished fibers. Thedispersion relationships of side- polished fibers werepresented by using three different kinds of liquids inthis thesis. Important parameters, e.g. effectiveinteraction length and polishing depth were estimated. Ourexperimental results showed good agreements with theoreticalcalculations. The effective inter- action length as long asabout 6mm was achieved. Suggested works includeimprovements of the polisher and further applications ofTi: sapphire laser in fiber-optics.