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    • 2. 发明申请
    • OPTICAL COUPLERS AND METHODS FOR MAKING SAME
    • 光学耦合器及其制作方法
    • WO2012088269A1
    • 2012-06-28
    • PCT/US2011/066481
    • 2011-12-21
    • NUFERNMAJID, ImtiazWANG, Chih-HaoTANKALA, Kanishka
    • MAJID, ImtiazWANG, Chih-HaoTANKALA, Kanishka
    • G02B6/28G02B6/293H01S3/067
    • G02B6/274B29D11/00711G02B6/02109G02B6/2843H01S3/06712H01S3/0675H01S3/07H01S3/094011H01S3/094019H01S3/09408
    • The present invention relates generally to optical waveguides for the transmission of electromagnetic energy. The present invention relates more particularly to optical couplers for coupling optical fibers, and methods for making them. One aspect of the present invention is an optical coupler for use with a polarization-maintaining input optical fiber and a polarization-maintaining output optical fiber. The coupler includes: a tube having a wide end, a narrow end having an end face, and a taper therebetween; a polarization-maintaining feed-through optical fiber having a first end having an end face and a second end, the polarization- maintaining feed-through optical fiber being disposed within the tube from the wide end to the narrow end, at least the narrow end of the tube being fused around a first length of the polarization-maintaining feed-through optical fiber including the first end of the polarization-maintaining feed-through optical fiber to form a coupler end face comprising the end face of the tube and the end face of the first end of the polarization-maintaining feed-through optical fiber. In one aspect of the invention, the polarization-maintaining feed-through optical fiber has an outer diameter no greater than about 200 μm in the region in which the tube is fused around it. In another aspect of the invention, the polarization-maintaining feed-through optical fiber has an outer diameter at the coupler end face no greater than about 75% of the diameter of the polarization-maintaining input optical fiber.
    • 本发明一般涉及用于传输电磁能的光波导。 本发明更具体地涉及用于耦合光纤的光耦合器及其制造方法。 本发明的一个方面是一种用于偏振波保持输入光纤和偏振保持输出光纤的光耦合器。 联接器包括:具有宽端的管,具有端面的窄端和其间的锥形; 一种偏振保持馈通光纤,其具有端面和第二端的第一端,所述偏振保持馈通光纤从宽端至窄端设置在管内,至少窄端 所述管被围绕包括所述偏振保持馈通光纤的所述第一端的所述偏振保持馈通光纤的第一长度熔合以形成包括所述管的端面和所述端面的耦合器端面 的偏振保持馈通光纤的第一端。 在本发明的一个方面,偏振保持馈通光纤在其周围熔合的区域中具有不大于约200μm的外径。 在本发明的另一方面,偏振保持馈通光纤在耦合器端面处的外径不大于偏振波保持输入光纤的直径的大约75%。