Detachable interface toward a low-loss reflow-compatible fiber coupling for co-packaged optics (CPO)

被引:2
|
作者
Du, Yinchao [1 ,2 ,3 ,4 ]
Wang, Feng [4 ]
Hong, Ziming [1 ,2 ,3 ]
Shi, Yuechun [1 ,2 ,3 ]
Chen, Xiangfei [1 ,2 ,3 ]
Zheng, Xuezhe [4 ]
机构
[1] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
[2] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Peoples R China
[3] Nanjing Univ, Coll Engn & Appl Sci, Microwave Photon Technol Lab, Nanjing 210093, Peoples R China
[4] Innolight Technol Res Inst ITRI, 8 Xiasheng Rd,Suzhou Ind Pk, Suzhou 215000, Peoples R China
关键词
Compendex;
D O I
10.1364/OE.480418
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
High-density reflow-compatible fiber I/O is one of the challenges for co-packaged optics (CPO). This paper developed a detachable coupling interface based on expanded beam edge coupling, which can be applied for optical coupling between lasers, PICs, and fibers, seamlessly supporting many channels with high efficiency. It comprises a removable fiber connector and a permanent chip/device connector, in which microlens/lens arrays are used for waveguide mode expansion and MT-like connectors are used for position registration. An effective alignment scheme based on beam detection was developed and implemented in an assembly station for building the removable fiber connectors, while the permanent chip/device connector was assembled by active alignment to a pre-made fiber connector mated with a registration connector. Promising results were obtained from the proof-of-concept demonstrations of the coupling from SiP PIC and III/V lasers to fibers using the off-the-shelf lenses and modified MT registration connectors. In both cases, less than 1 dB coupling loss was achieved with an expanded beam size of 160 mu m in diameter. Even with a relatively large lens offset of similar to 35 mu m, the detachable fiber array connectors showed good interchangeability. Such a coupling interface is expected to be solder-reflow compatible by replacing the plastic registration connectors with ceramic ones, making it a promising candidate for the solution to CPO fiber I/O. (c) 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
引用
收藏
页码:1318 / 1329
页数:12
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