Subtitle: Analysis of Dayluxa Quartz Fiber Specifications in Sunlight Transmission

Fiber optic light guiding systems are technologies that utilize optical fibers to transmit light signals, commonly used to import natural sunlight from outdoors into indoor environments. The main components of such systems include light collectors (such as Fresnel lenses), fiber optic transmission media, and output diffusers. In the Dayluxa sunlight importation system, this technology is applied to transmit full-spectrum natural light, supporting various indoor application scenarios such as museum lighting, medical facilities, and scientific research laboratories. This article will popularize the key performance parameters of fiber optic light guiding systems and illustrate them using Dayluxa's quartz fiber product specifications as examples. These parameters determine the system's transmission efficiency, light intensity attenuation, and applicability, ensuring reliable operation of the fiber in practical deployments.

1. Geometric Dimensions Parameters

Geometric dimensions define the physical structure of the fiber, directly affecting light collection and transmission capabilities. These mainly include core diameter, cladding diameter, and outer jacket diameter.

• Core Diameter: The core is the central part for light signal transmission. A larger diameter allows for higher light power transmission but increases manufacturing difficulty and cost. In sunlight importation systems, a larger core helps capture more spectral components.
• Cladding Diameter: The cladding surrounds the core, ensuring total internal reflection of light within the core. Cladding materials are typically low-refractive-index polymers.
• Outer Jacket Diameter: The outer layer protects the fiber from mechanical damage and environmental influences.

For Dayluxa's C-1500/1700 quartz fiber as an example:

• Core Diameter: 1500±40μm
• Plastic Cladding Diameter: 1750±40μm
• ETFE Buffer Jacket Diameter: 2000±70μm
• LSZH Outer Jacket Diameter: 3000±100μm

These specifications ensure the fiber's durability and efficient transmission, suitable for long-distance indoor light importation.

2. Optical Performance Parameters

Optical performance determines the fiber's efficiency and quality in light transmission, especially in preserving full-spectrum sunlight.

• Numerical Aperture (NA): NA represents the conical angle range over which the fiber can accept light. A higher NA allows the fiber to capture more incident light but may increase modal dispersion. Typical values range from 0.2 to 0.5.
• OH Content: Hydroxyl (OH) content affects attenuation at specific wavelengths (such as near-infrared). Low-OH fibers are suitable for transmitting broad-spectrum sunlight to reduce absorption losses.
• Attenuation: Measures the loss of light signal during transmission, usually in dB/km. Low attenuation is key to efficient light guiding systems.

Dayluxa quartz fiber specifications include:

• Numerical Aperture: 0.37±0.02
• OH Content: Low OH
• Attenuation @1000nm: <10.0 dB/km

These parameters enable the Dayluxa system to maintain high spectral integrity when transmitting natural sunlight, suitable for scenarios with high light quality requirements, such as biological research.

3. Material Characteristics Parameters

Material selection affects the fiber's durability and environmental adaptability.

• Core Material: High-purity quartz glass is a common choice due to its low absorption and high transmittance.
• Cladding Material: Fluorine-containing polymers provide low refractive index, ensuring total internal reflection.
• Buffer Material: Such as ETFE, providing additional protection.

Dayluxa uses:

• Core Material: Pure Low OH silica
• Plastic Clad Material: Polymer coating cladding
• Buffer Material: ETFE (or equivalent)

These materials ensure stable operation of the fiber in solar tracking systems, supporting GPS dynamic sun-tracking functionality.

4. Usage Environment and Mechanical Performance Parameters

These parameters ensure the fiber's reliability in actual installation and operation.

• Temperature Range: The fiber must withstand indoor-outdoor temperature differences.
• Bending Radius: Short-term and long-term bending radii limit curvature during installation to avoid light loss or breakage.
• Proof Testing Tension: Indicates the fiber's tensile strength.

Dayluxa specifications:

• Continuous Usage Temperature: -60℃~125℃
• Short-term Bending Radius: ≥150mm
• Long-term Bending Radius: ≥300mm
• Proof Testing Tension: 75Kpsi

These indicators make Dayluxa fibers suitable for building integration, such as underground spaces or windowless industrial environments.

5. Output Light Intensity Performance

Output light intensity is key to evaluating the practical effectiveness of the light guiding system, depending on outdoor illuminance, transmission distance, and fiber length. Test data can quantify the system's efficiency.

In the Dayluxa fiber optic sunlight importer output light intensity test (based on February 28, 2023, test at 1-2 PM, outdoor illuminance 150,000 LUX):

Outdoor Illuminance (LUX)	Irradiation Distance (CM)	Single-Core Fiber Illuminance (LUX) - 30M	Single-Core Fiber Illuminance (LUX) - 50M	Single-Core Fiber Illuminance (LUX) - 100M	Effective Irradiation Area
150,000	1m	1100	823	210	1 M²
150,000	2m	450	320	80	1 M²
150,000	3m	150	110	45	1 M²

The data shows that as fiber length increases, light intensity attenuates significantly, but even at 100M transmission, it still provides quantifiable indoor illuminance. This reflects the practicality of the Dayluxa system in long-distance transmission.

Summary

The key performance parameters of fiber optic light guiding systems cover geometric, optical, material, mechanical, and output aspects. These parameters collectively determine the system's transmission efficiency and application scope. Dayluxa's quartz fiber products achieve efficient sunlight importation by optimizing these indicators, supporting sustainable buildings and healthy environment applications. When designing and selecting, these parameters should be evaluated based on specific scenarios (such as light transmission distance and environmental temperature) to ensure system performance.