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Multiport Optical Bare-Fiber Connector for Parallel Optical Interconnect Module
Yasuhiro ANDO Mitsuo USUI Nobuo SATO Kosuke KATSURA
IEICE TRANSACTIONS on Electronics
Publication Date: 1999/01/25
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Electromechanical Devices and Their Materials)
optical connector, optical interconnection, optical fiber, buckling, optical module,
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A high-density multi-port optical connector that exploits the flexibility of bare optical fibers has been developed for use as an optical interface of a parallel optical interconnection module. In the BF (Bare-Fiber) connector, 24 multimode-fibers are mated by direct physical contact in micro-glass-capillaries with a 250-µm pitch. The buckling forces of the optical fibers themselves secure the physical contact. Optical fiber buckling is investigated theoretically and experimentally. A new design method to optimize the span length l and the longitudinal displacement ΔL for the buckling is also proposed based on the requirements afor optical characteristics, mechanical reliability, and dimensional tolerances, etc. A prototype BF connector with l 10 mm and ΔL of 50 µm was designed and fabricated for multimode fiber connections. This connector provides high optical performance: an average insertion loss of 0.05 dB and a return loss of over 35 dB at 850 nm. The optical performance remained stable after a durability test with ten connection-repetitions.