For information regarding our journey from "Adamant Namiki Precision Jewel Co." to "Orbray Co." Please click here

Expand Beam Connector


Unlike conventional connectors, expanded beam connectors provide high durability and stability by utilizing an expanded beam of light. This feature prevents the end-face from contamination even after repeated use of connection and dis-connection, making maintenance easy. The connector is also adaptable to special environments and will remain dependable even in harsh environments.

Expanded beam connection technologyUnder Development

Expanded beams employ a technology that expands the beam for transmission. This technology has several advantages.

  • 1. Connection made by non-contact spatial propagation

    Connectors can be connected to each other by non-contact air gap space propagation. This prevents wear and tear and improves long-term reliability.

  • 2. Highly resistant to contamination

    Designed to resist contamination (dirt and foreign matter), so it is not affected by the environmental conditions. Easy to manage since end-face cleaning is not required.

  • 3. High-precision coaxial (concentricity) characteristics

    By utilizing our high-precision processing technology with more than 40 years of experience in ferrule and sleeve manufacturing allows for reduced loss fluctuation in connector tuning.

  • 4. Customizable

    In-house optical and mechanical design enables customized optical characteristics and size. Sleeves and ferrules can also be manufactured in-house, allowing for a high degree of design freedom.

  • 5. Applicable to various connector types

    Expanded beam connection technology has been established and can be applied not only to LC connectors but also to a variety of other connector types.

  • 6. Adaptation to special environments

    Expected to remain dependable even in special environments, these characteristics allow for expanded beam connectors to provide high performance in a wide range of applications and reliability, especially in harsh environments.

Comparison of termination methods

New method
Expanded Beam (Collimated Beam)

Expanded Beam (Collimated Beam)

The use of a lens results in a non-contacting spatial coupling of the end faces, which reduces insertion loss variation in rotation movement. It also has the advantage of being less susceptible to end-face damage and contamination eliminating the need for end-face cleaning.

Conventional method
Physical Contact (PC)

Physical Contact (PC)

Since ferrule end faces make physical contact to each other to form a connection, the insertion loss (IL) is excellent. However, the ferrule is more susceptible to wear due to rotation movement and thus, a higher risk of end-face damage and contamination is present, and the end faces must be cleaned.

Special Characteristics

Special Characteristics
Design Example
Singlemode type (@1550nm)
Radiation angle (1/e2): φ160 μm
・Radiation angle (1/e2): <1°
Multimode type (@850 nm)
・Beam diameter (5%): φ380 μm
・Radiant angle (5%) : <3°

Rotation Loss Variation

Multimode type expanded beam

Multimode type expanded beam

Expanded beam and butt-coupling

Expanded beam and butt-coupling


  • Medical Equipment
  • Automotive
  • Aviation
  • Defense
  • Broadcasting and video equipment
  • Telecommunications
  • Testing and Measurement equipment


*If you cannot find the contact form, please click here.

Mon-Fri 9:00-17:00 JST+81-3-3919-1171


Online Contact