Fabrication and Packaging of Fiber Array

• Main Authors: Hwang,Jyan-Yuh, 黃見裕
• Other Authors: Wang Lon
• Format: Others
• Language: zh-TW
• Published: 1994
• Online Access: http://ndltd.ncl.edu.tw/handle/42689309410346069153

碩士 === 國立臺灣大學 === 光電(科學)研究所 === 82 === The thesis mainly discusses how to increase the optical coupling efficiency between a laser array and a single-mode fiber array, and to explore their packaging technology for fiber communication. We fabricated a hemispherical microlens on the fiber end to couple light from the laser. The coupling efficiency was measured more than 40%. The lensed fiber was made by first tapering a bare fiber through chemical etching, and then by forming a microlens at the tapered end through carbon dioxide laser heating. Such a fabrication process can potentially allow mass production. In addition, we simulated and measured the return loss of lensed fibers for different radii. Typical values of return loss were measured of 14.4dB for free end fiber. Fibers were precisely clamped between two identical silicon V-groove to comprise an array before forming microlens. The spacing of two adjacent fibers was of 250μm, identical to that of two neighboring lasers. The silicon V- groove was fabricated by KOH wet etching. A coupling efficiency of 20% was achieved between a laser array and a fiber array. To package a laser and a lensed fiber, we firstly fixed the fiber in a copper-plating tube, and assembled the laser and the fiber on the same substrate using solders of different melting points. Due to the possible effects of shrinkage and misalignment , a coupling efficiency of 20% was achieved. In addition, we made some proto-type high-speed microwave driving circuits for the laser.