Fiber optic prefabricated quartz rod, known as the "chip" of the fiber optic cable industry, is the core basic material for drawing optical fibers. It is a high-purity silica glass cylinder, and its precise refractive index distribution structure directly determines the transmission performance of the final optical fiber. As the starting point of the information highway, a high-quality prefabricated rod can pull hundreds of kilometers of ultra-low loss optical fiber, which is the fundamental guarantee for the stable operation of key infrastructure such as global 5G networks, data centers, and submarine cables.

Frequently Asked Questions (FAQ) about Fiber Optic Prefabricated Quartz Rod

Q1: What level of optical purity does the fiber preform typically reach?

A: Our fiber optic prefabricated quartz rod adopts advanced synthesis technology, and the purity of silicon dioxide (SiO ₂) usually reaches 99% or even 99.99%. This extremely high chemical purity effectively reduces the absorption and scattering of impurity ions on optical signals, ensuring extremely low attenuation of optical fibers at 1550nm wavelength (usually below 0.204 dB/km), meeting the stringent requirements of long-distance communication.

Q2: What specifications and sizes of customized services can you provide?

A: We have strong non-standard customization capabilities. In terms of size, we can provide prefabricated rods with outer diameters ranging from 130mm to 150mm or even larger, with customizable lengths (such as ≥ 1600mm) and tolerances controlled within ± 0.1mm. In terms of structure, whether it is single-mode fiber preform or multi-mode, special fiber preform, we can accurately customize according to the customer's drawing tower equipment parameters and final fiber design specifications.

Q3: What is the mechanical strength of prefabricated bars? Will it affect the drawing efficiency?

A: Our prefabricated bars have excellent mechanical properties, with a fracture modulus typically exceeding 350MPa. This high-strength characteristic ensures that the preform is not easily broken during the high-temperature drawing process, and can withstand the tension caused by high-speed drawing (up to 20 meters/second), thereby significantly improving the operational efficiency and yield of the fiber optic production line.

Q4: What is the thermal stability performance of this quartz rod?

A: Fiber optic prefabricated quartz rods have an extremely low coefficient of thermal expansion (5.5 × 10 ⁻⁷/° C) and a very high softening point (approximately 1730 ° C). It can be used for a long time at 1100 ° C and can withstand short-term high temperature impacts of 1450 ° C. This excellent thermal stability ensures a constant size ratio between the core and cladding during the drawing process, ensuring consistency in the geometric parameters of the optical fiber.

Resolve your core challenge

Fiber optic prefabricated quartz rods are designed to address the ultimate pursuit of "transmission distance" and "signal quality" in the field of optical communication. It eliminates modal dispersion and attenuation bottlenecks in optical signal transmission through precise refractive index profile design, solving the problem of signal loss in high-speed data transmission. For special fiber optic users, it solves the pain points of ordinary fiber optic failure and damage in extreme environments such as strong radiation, high temperature, or high-energy laser transmission, providing a reliable physical carrier for industrial lasers, medical sensing, and aerospace applications.

The core advantages and application value of fiber optic prefabricated quartz rods

1. Ultimate optical transparency and low loss

Advantages: Advanced processes such as OVD, VAD, or PSOD are used to ensure that there are no bubbles or impurities inside the material. It has extremely high transmittance in the wavelength range of 200-2500nm.

User value: directly converted into the low attenuation characteristics of optical fibers. For communication operators, this means an extension of relay station spacing and a reduction in construction costs; For laser users, this means higher energy transfer efficiency.

2. Precise refractive index profile control

Advantage: We can precisely control the refractive index difference (Δ n) between the core and cladding, and even achieve complex parabolic or linear gradient refractive index distributions.

User value: The ability to customize optical fibers with specific numerical apertures (NA) to meet the needs of different application scenarios, such as large core diameter energy transmission or small mode field diameter sensing, optimizing spot quality.

3. Excellent thermal and chemical stability

Advantages: Acid and alkali corrosion resistance, excellent thermal shock resistance.

User value: enables the drawn optical fiber to work stably in harsh environments such as chemical sensing and nuclear industry monitoring for a long time without frequent replacement, significantly reducing maintenance costs.

Customer Application Cases

Case 1: A National Submarine Cable Project - Challenges of Ultra Long Distance Transmission

Customer pain point: When laying cross ocean communication optical cables, customers require that the attenuation of the fiber in the 1550nm band must be less than 0.18dB/km, and that the water peak (loss at 1383nm) must be eliminated to ensure that the signal can still be recognized after thousands of kilometers of transmission.

Solution: We have provided a low water peak fiber preform manufactured using an improved VAD process. By using ultra high purity synthetic quartz sleeves and precise core rod deposition control, we have reduced the OH ⁻ ion content to the ppb level.

Application results: The attenuation of the final drawn optical fiber at 1383nm was successfully controlled below 0.30dB/km, fully meeting the engineering specifications and ensuring the continuous 5-year fault free operation of the submarine cable system.

Case 2: A certain industrial laser giant - the problem of high-energy laser transmission

Customer pain point: The 10000 watt fiber laser developed by the customer often burns out the end face of the transmission fiber due to thermal effects during long-term operation, and the beam quality decreases with increasing temperature.

Solution: We have customized a double clad fiber preform with a large mode field area (LMA) for it. By designing a special refractive index profile (concave inner cladding structure), we effectively suppress the transmission of higher-order modes and improve the fiber's resistance to optical damage threshold.

Application achievements: The optical fiber drawn from the prefabricated rod successfully carried a laser power of 12000W, worked continuously for 1000 hours without damage, and maintained a beam quality (M ⊃2; factor) within 1.1, helping customers successfully launch a new generation of high-power laser cutting equipment.

Case 3: An Aerospace Research Institute - Extreme Environmental Sensing Needs

Customer pain point: It is necessary to install fiber optic grating sensors inside the aircraft engine (high temperature, strong vibration). Ordinary fiber optic coatings are prone to detachment, and quartz substrates are prone to microcracks.

Solution: We provide special high-temperature resistant optical fiber preforms with high mechanical strength (fracture modulus>400MPa) and provide polyimide coating process recommendations.

Application achievements: The sensor maintains stable signals even in high temperature and severe vibration environments of 800 ° C, successfully achieving real-time and accurate monitoring of engine blade temperature.

Want to create high-performance fiber optic products? Contact us immediately for exclusive customized solutions and quotes for fiber optic prefabricated rods!

Luverre Quartz manufactures and sells a wide range of high quality quartz glass, including quartz tubes, quartz plates, quartz rods, quartz windows, quartz crucibles, quartz boats, quartz flanges, quartz beakers, quartz glass instruments, and more. We can meet all kinds of customized requirements for quartz glass products.