Free-space optical links for board-to-board interconnects
Free-space optical links for board-to-board interconnects
复制标题
用于板对板互连的自由空间光链路
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
Shih
中科院分区：
文献类型：
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作者：
H. Kuo;P. Rosenberg;R. Walmsley;S. Mathai;Lennie Kiyama;J. Straznicky;M. McLaren;M. Tan;Shih
我们描述了两个多通道光互连的自由空间光链路。目标聚合数据速率为240 Gb/s。在一个实施方式中，我们使用远心光学器件的独特实施方式，并且实现了简单、鲁棒和模块化的光链路。我们描述了一个简单，廉价的远心透镜，可以容纳所有的光学通道内的1毫米直径的甜区。我们还描述了一个4×4阵列的VCSEL和匹配检测器的光链路的性能。在VCSEL和检测器阵列之间的平移未对准>±2 mm的情况下，光学链路的完整性不会显著降低。利用远心光链路，我们只需要两个低带宽、单轴主动伺服机构来补偿发射器和接收器阵列之间的静态倾斜和可能的低频热驱动移位。在另一种实现中，我们使用两个匹配的1×12光纤阵列。数据通过一对准直微透镜阵列通过2 mm的气隙进行光学耦合，所述准直微透镜阵列通过精密机械微透镜彼此对准。我们描述了一个简单的，廉价的，和强大的机械耦合的光链路，通过使用微型高通量磁铁。
We describe two free-space optical links for multichannel optical interconnects. The targeted aggregate data rate is 240 Gb/s. In one implementation we use a unique implementation of telecentric optics and achieved an optical link that is simple, robust, and modular. We describe a simple, inexpensive telecentric lens that can accommodate all optical channels within a 1-mm-diameter sweet zone. We also describe the performance of an optical link with a 4×4 array of VCSELs and matching detectors. The integrity of the optical link is not significantly degraded with a>±2 mm translational misalignment between the VCSEL and detector arrays. With the telecentric optical link, we need only two low-bandwidth, single-axis active servomechanisms to compensate for static tilt and possibly low-frequency thermally-driven shift between the transmitter and receiver arrays. In the other implementaion we use two matching arrays of 1×12 optical fibers. Data are coupled optically through an air gap of 2 mm by means of a pair of collimating microlens arrays that are aligned to one another via precision mechanical subassemblies. We describe a simple, inexpensive, and robust mechanical coupling for the optical link achieved by using miniature high-flux magnets.