Large Core Diameter Preform
(Step Index Multimode Preform)

The large core diameter preform is a highly specialized multimode preform designed and developed specifically for rigorous energy transmission and sensing applications.

Manufactured using an advanced in-tube chemical vapor deposition (CVD) process, this series ensures exceptional core purity and highly controlled refractive profiles. By delivering a remarkably high numerical aperture and outstanding geometric uniformity, Opticlumos empowers global photonics engineers to achieve maximum coupling efficiency and reliable signal integrity in complex laser and communication systems.

Product Structure & Features

Optimized for maximum energy capacity, the preform features a high-purity massive core surrounded by an index-depressed fluorinated cladding, minimizing energy loss during transmission.

Key Advantages

  • High numerical aperture for superior light coupling and gathering efficiency.
  • Excellent geometric uniformity guaranteeing stable fiber drawing parameters.
  • Good uniformity of refractive index distribution for minimal modal dispersion.
Pure Quartz Core Layer Fluorine-Doped Silica Cladding Layer

Cross-Sectional Structure Diagram

Application Fields

Due to its high energy-carrying capacity and robust geometry, this multimode preform is the fundamental material for:

  • High-power laser energy transmission systems.
  • Precision fiber optic sensing networks.
  • Optical device connection and advanced photonics packaging.
  • Short-distance, high-bandwidth data communication.

Product Specification

Properties Unit Product Specification
Core layer material / Low hydroxyl pure silica quartz core layer
Cladding material / Fluorine-doped silica cladding layer
Core numerical aperture (NA) / 0.06 ~ 0.24
Geometric Properties
Preform length mm ≤ 500.0
Outer diameter of preform mm ≤ 22.0
CCDR (Cladding-to-Core Diameter Ratio) / ≤ 1.25
Core concentricity mm ≤ 0.2
Out-of-roundness of preform % ≤ 1.0

Customized Information

Bespoke Manufacturing Capabilities:

  • Fully customizable double cladding large core diameter preforms for specialized laser applications.
  • For designs requiring small numerical apertures, significantly larger size preforms can be tailored to meet your production scale.

FAQ

What are the primary applications of the Large Core Diameter Preform?
Engineered as a step index multimode preform, this product is highly optimized for robust energy transmission. It is widely used in manufacturing optical fibers for laser energy transmission, high-precision fiber optic sensing, optical device connections, and short-haul data communication systems.
What materials are used in the core and cladding of this preform?
To guarantee superior energy transfer with minimal modal dispersion, the preform features a low hydroxyl pure silica quartz core layer. This massive core is surrounded by a highly controlled fluorine-doped silica cladding layer, establishing a precise refractive index step.
What is the numerical aperture (NA) range for this product?
Our standard fabrication process yields a core numerical aperture ranging tightly between 0.06 to 0.24. For highly specialized optical projects demanding small numerical apertures, we can fully customize and scale up to larger size preforms to meet your specific drawing requirements.
Can you fabricate double cladding large core preforms?
Yes, our advanced in-tube chemical vapor deposition (CVD) capabilities allow us to completely customize double cladding large core diameter preforms. These are particularly valuable for high-power laser pumping and specialized photonic sensing where advanced light confinement is critical.