Multicore fiber 4 TX + 4 RX optical transceiver based on holey SiGe IC
Multicore fiber 4 TX + 4 RX optical transceiver based on holey SiGe IC
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基于多孔SiGe IC的多芯光纤4 TX 4 RX光收发器
DOI：
10.1109/ectc.2014.6897412
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
C. Schow
中科院分区：
文献类型：
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作者：
F. Doany;D. Kuchta;A. Rylyakov;C. Baks;S. Tian;M. Schultz;F. Libsch;C. Schow
一种新型光收发器具有 4 个发射器加 4 个接收器通道，专为耦合到多芯多模光纤而设计，并已对其进行了表征。该收发器基于多孔 Optochip 概念，其中 4 通道 VCSEL 和光电二极管阵列通过 AuSn 焊料倒装连接到单芯片 SiGe IC。 SiGe IC 中制造有光学通孔（孔），以实现对传统顶部发射 850 nm 光电阵列的光学访问。光电阵列采用四 VCSEL 和四光电二极管配置，其中 4 个器件以 50 μm 密集间距排列在 2 × 2 阵列上。收发器模块通过将光芯片倒装焊接到 8 mm × 8 mm 高速高密度有机载体上来完成。通过 2 个光学通孔提供穿过 IC 背面的光学接入。电气 I/O 通过模块底部 0.8 毫米间距的 BGA 焊盘提供。在焊接到测试卡的 2 个模块（发射器 (TX) 和接收器 (RX) 模块）之间进行了高速表征。 TX 光电芯片的 4 个光学输出中的每一个都耦合到 MMF 中，并定向到 RX 模块中的各个光电二极管。眼图是在数据速率为 20 Gb/s 至 42 Gb/s 时测量 TX 输出以及 TX 到 RX 链路的。 4 条光链路的无差错运行速度高达 40 Gb/s，实现了多模并行光收发器的创纪录数据速率。
A novel optical transceiver with 4 transmitter plus 4 receiver channels designed for coupling to multicore multimode fiber has been fabricated and characterized. The transceiver is based on the holey Optochip concept where 4-channel VCSEL and photodiode arrays are flip-chip attached to a single-chip SiGe IC using AuSn solder. Optical vias (holes) are fabricated into the SiGe IC to enable optical access to the conventional topside emitting 850-nm optoelectronic arrays. The optoelectronic arrays are arranged in a quad-VCSEL and quad-photodiode configuration where the 4 devices are on a 2 × 2 array on a dense 50-μm pitch. The transceiver module is completed by flip-chip soldering the Optochip onto a 8 mm × 8 mm high-speed high-density organic carrier. Optical access through the backside of the IC is provided through 2 optical vias. Electrical I/O is supplied through BGA pads on 0.8 mm pitch at the bottom of the module. High-speed characterization was carried out between 2 modules soldered to test cards, a transmitter (TX) and a receiver (RX) module. Each of the 4 optical outputs from the TX Optochip was coupled into a MMF and directed to individual photodiodes in the RX module. Eye-diagrams were measured for TX outputs as well as TX-to-RX links at data rates 20 Gb/s to 42 Gb/s. The 4 optical links operate error free up to 40 Gb/s, achieving a record data rate for multimode parallel optical transceivers.