Ferrules and optical modules for multi-core optical connectors

JP2026090674APending Publication Date: 2026-06-02HAKUSAN INC
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
HAKUSAN INC
Filing Date
2026-03-17
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Ferrules in multi-core optical connectors face challenges with dimensional instability and misalignment due to temperature changes during solder reflow and operational heating, leading to increased connection loss and misalignment of optical fibers.

Method used

A ferrule made of a resin composition containing polyphenylene sulfide with controlled dimensional change rate of 0.1% or less at 260°C, incorporating a thermal expansion absorbing portion in the boot insertion hole to manage internal thermal expansion, and heat-treated at a specific temperature range to minimize distortion.

Benefits of technology

The ferrule maintains dimensional accuracy and mechanical strength, reducing connection loss and misalignment even under thermal fluctuations, enabling high-density optical communication near electronic components.

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Abstract

The objective is to provide a ferrule for multi-core optical connectors that exhibits low connection loss even when optical wiring is mounted on a circuit board. [Solution] The multi-core optical connector ferrule of the present invention is obtained by molding a resin composition containing polyphenylene sulfide, and is a multi-core optical connector ferrule having an optical fiber insertion hole 103 and a guide hole 102 for inserting a guide pin, and has a dimensional change rate of 0.1% or less when heated at 260°C. The multi-core optical connector ferrule is a high-density optical connector provided with 8 or more optical fiber insertion holes, and the optical fiber insertion holes are provided with an inner diameter of 127 μm or less and a pitch of 250 μm or less.
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