Research on an expanded beam single-mode fiber-optic connector.

Area of Science:

• Optoelectronics
• Fiber Optics
• Optical Engineering

Background:

• Single-mode fiber connectors are crucial for optical communication systems.
• Existing connectors can suffer from high insertion loss and sensitivity to contamination.
• Expanded beam connectors offer potential for improved alignment and tolerance to dirt.

Purpose of the Study:

• To demonstrate a new expanded beam single-mode fiber-optic connector.
• To achieve aberration-free beam expansion with a novel fiber taper design.
• To evaluate the connector's performance in terms of insertion loss and repeatability.

Main Methods:

• Development of a cylindrical straight-tip optical fiber taper for aberration-free beam expansion.
• Design of a unitary, self-aligning taper structure for simple connector assembly.
• Utilizing a sleeve for aligning two tapers to form the connector.
• Experimental measurement of insertion loss and repeatability.

Main Results:

• Achieved aberration-free beam expansion by a factor of 5.
• Demonstrated a unitary, self-aligning taper structure with a 2.5 mm outer diameter.
• Realized insertion losses as low as 0.15 dB/pair.
• Attained a repeatability of 0.1 dB.
• The connector design proved to be dirt-tolerant.

Conclusions:

• The demonstrated expanded beam fiber-optic connector provides efficient and reliable optical coupling.
• The novel taper design enables high-performance, aberration-free beam expansion.
• The connector's low insertion loss, high repeatability, and dirt tolerance make it suitable for demanding applications.