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Self-Aligning Optical Interconnect Scheme Using Put-in Microconnector

Toshio KATO, Rogerio Jun MIZUNO, Kenichi IGA

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Summary :

We introduce a new type of optical microconnector named "put-in microconnector-" using a planar microlens. The connector part is composed by a lens jack and fiber plug, where the lens jack is a hollow formed on a planar microlens surface, and the fiber plug is a protuberance formed on the core of an optical fiber. This concept can realize an alignment-free single mode fiber coupling. In this paper, we describe the structure and fabrication process, the optical coupling characteristics of the fabricated device, and finally, the basic analysis of optical coupling module. For the optical coupling characteristics, we measured the coupling loss and the return loss. The optical coupling loss of about 4 dB and the return loss of about 49 dB were obtained at wavelength of λ = 0.633 µm. Moreover, we have confirmed that the insertion loss of such a structure does not increase so much in comparison with that of the butt jointing. For the purpose of characterizing the optical property, the theoretical analysis was performed. We have made a software tool to estimate the optical coupling loss due to the position error. For this type of structure, the tolerance of about 15 µm for the distance between the laser and the planar microlens and 150 µm for the distance between the planar microlens and the optical fiber were estimated. Since the put-in microconnector does not require any precise alignment, it is appropriate for mass production.

Publication
IEICE TRANSACTIONS on Electronics Vol.E80-C No.1 pp.139-143
Publication Date
1997/01/25
Publicized
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DOI
Type of Manuscript
Special Section PAPER (Special Issue on Devices, Packaging Technology, and Subsystems for the Optical Access Network)
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