楔形光纤与半导体多量子阱平面光波光路芯片的耦合分析  

Alignment and Coupling between Planar Lightwave Circuit Chip and Wedge-Shaped Fiber

作　　者：刘旭[1] 肖金标[1] 孙小菡[1] 

机构地区：[1]东南大学电子科学与工程学院,南京210096

出　　处：《光学学报》2007年第4期680-684,共5页Acta Optica Sinica

基　　金：国家"十五"计划863子项目(2002AA31230);江苏省高技术项目(7706008020)资助课题

摘　　要：采用楔形光纤(WSF)实现了与半导体多量子阱(MQW)平面光波光路(PLC)芯片的高效耦合。在多量子阱-平面光波光路前置模斑转换器(SSC)和不加模斑转换器的情况下,用阶梯串联法(SCM)数值模拟并优化设计了楔形光纤-平面光波光路间最佳耦合参量:楔形光纤楔角45°、端面圆柱透镜曲率半径2.5μm、模斑转换器-多量子阱-平面光波光路出射椭圆光斑长半轴3.5μm、纵横比5、楔形光纤-平面光波光路间垂直方向和水平方向无偏移、纵向间距5.5μm。用反向推演法(IDM)实验分析了楔形光纤样品的出射光场,与阶梯串联法(SCM)计算结果相比长轴误差为3.125%,短轴误差为0.8%。建立楔形光纤-平面光波光路-单模光纤(SMF)的耦合实验系统,在1.55μm波长处以单模光纤作为出纤的相同条件下,发现楔形光纤激励入射平面光波光路比单模光纤和锥形透镜光纤(TLF)作为入纤的耦合效率分别提高了24.827 dB和16.22 dB,为多量子阱-平面光波光路芯片尾纤封装技术提供了实验原型。An approach to alignment and coupling between wedge-shaped fiber （WSF） and semiconductor multiple quantum well planar lightwave circuit （PLC） chip integrated with two-dimensional spot size converter （SSC） was presented. Using staircase concatenation method （SCM）, the optimum coupling conditions were achieved for wedgeshaped fiber wedge angle, cylindrical endface lens curvature radius, semimajor axis of planar lightwave circuit elliptical field, aspect ratio of planar lightwave circuit elliptical field, misalignment tolerance between wedge-shaped fiber and planar lightwave circuit to be 45°, 2.5μm, 3.5 μm, 5 μ, 5.5 μm respectively. The output spot of wedgeshaped fiber was experimentally characterized by inverse deducing method （IDM）. Compared with the staircase concatenation method computation, the error for the semimajor axis was 3. 125 %, while that for the semiminor axis was 0.8%. 1.55μm signal laser was injected into planar lightwave circuit from SMF, tapered and lensed fiber （TLF）, wedge-shaped fiber separately as planar lightwave circuit input fiber with the same SMF as output fiber. The coupling efficiency for wedge-shaped fiber was 24. 827 dB and 16.22, dB higher than that of SMF and TLF, and therefore an experimental prototype of wedge-shaped fiber-planar lightwave circuit-SMF coupling linkage was established for pigtailed planar lightwave circuit packaging technique.

关 键 词：集成光学 多量子阱 平面光波光路 耦合封装 楔形光纤 阶梯串联法 

分 类 号：TN256[电子电信—物理电子学]