1-300mm optical cylindrical quartz rod

From 1mm to 300mm diameter, from optical grade transparency requirements to precision support in high-temperature and high-pressure environments - our cylindrical quartz rods are designed specifically for demanding optical, semiconductor, fiber optic, and laboratory applications. Each round rod is made of high-purity quartz material and manufactured through precision cold processing and hot forming processes, ensuring precise size, smooth surface, and uniform internal no bubbles, meeting your ultimate requirements for transparency, heat resistance, and chemical stability.

Frequently Asked Questions (FAQ)

Q1: Can the maximum diameter of a quartz round rod really reach 300mm? Is there a length limit?  

A: Yes, we have large quartz processing equipment that can stably produce optical grade quartz round rods with diameters ranging from 1-300mm and lengths up to 1500mm. Exceeding the standard length can also be customized in segments.

Q2: What is the transparency? Is it suitable for wideband applications from ultraviolet to infrared?  

A: Our quartz material has a transmittance of ≥ 90% in the range of deep ultraviolet (185nm) to near-infrared (2500nm), and high batch consistency, making it suitable for applications such as spectrometers, laser cavities, optical windows, etc.

Q3: Can non-standard sizes, chamfering, punching, or surface polishing grades be customized?  

A: Fully supported. You only need to provide drawings or technical parameters, and we can complete external grinding, end face grinding, center drilling, threaded interfaces, flame polishing or optical grade polishing (Ra<0.2nm).

Q4: What are the temperature resistance and thermal shock resistance?  

A: Long term use temperature can reach 1100 ℃, short-term resistance to 1200 ℃, extremely low thermal expansion coefficient (5.5 × 10 ⁻⁷/℃), can be directly put into water from high temperature without explosion.

Q5: Do you have stock available? What is the minimum order quantity?  

A: We have a small inventory of commonly used diameters (5mm, 10mm, 20mm, 50mm); There is no minimum order quantity limit for customized orders, and one unit can also be produced.

What core needs can the product solve for you?

-Uneven transmission path? ——The optical grade quartz round rod has no stripes or bubbles inside, and the beam transmission is distortion free.  

-Deformation or rupture under high temperature? ——Ultra low thermal expansion and excellent thermal shock resistance, maintaining dimensional stability in laser cavities or diffusion furnaces.  

-Chemical corrosion causing pollution? ——Acid and alkali resistant (except hydrofluoric acid and hot phosphoric acid), does not precipitate metal ions, suitable for high-purity process environments.  

-Difficulty in purchasing non-standard sizes? ——1-300mm full range customization, no need to compromise design due to standard parts.

Core technical parameters and advantages of the product

Diameter range: 1mm – 300mm, covering micro fiber inserts to large optical support columns

Material purity: SiO ₂ ≥ 99%, no UV absorption, no metal contamination

Transmittance: 185-2500nm ≥ 90%, directly used as a light guiding medium without the need for additional coating

Surface roughness: up to Ra ≤ 0.2nm (optical grade), reducing scattering loss and improving optical efficiency

Temperature resistance: Long term 1100 ° C/short term 1200 ° C, suitable for high-temperature processes such as CVD, diffusion, annealing, etc

Thermal expansion coefficient: 5.5 × 10 ⁻⁷/° C, resistant to thermal shock, does not crack due to sudden temperature changes

Customization ability: length, end face shape, holes, threads, steps, reducing secondary processing, directly installed for use

Typical application scenarios and problem solving

1. Optical rod lens in high-power lasers

Problem: Ordinary glass or crystal rods produce thermal lensing effect under continuous high-power laser, resulting in a decrease in beam quality.  

Solution: We provide quartz round rods with a diameter of 3-25mm and optical polishing at both ends, which have high thermal conductivity and extremely low absorption. When used as rod lenses or uniform rods, they can work stably for a long time under 500W laser.

2. Supporting roller shaft in semiconductor diffusion furnace

Problem: The metal shaft oxidizes and releases impurities to contaminate the wafer at 1200 ℃.  

Solution: A large-sized quartz round rod with a diameter of 80-150mm is used to process the roller shaft, which has no metal contact, high temperature resistance, and high purity. It has been used in the 6-12 inch diffusion furnace renovation project.

3. Target rods in the manufacturing of fiber preform rods

Problem: The outer diameter of the target rod needs to be precisely controlled within ± 0.05mm and cannot bend at high temperatures.  

Solution: We customize high-purity quartz round rods with an outer diameter of 30-60mm and a length of 1200mm, with a straightness of ≤ 0.1mm/m, which can be reused over 200 times in MCVD or OVD processes.

4. Long path sample cell in laboratory spectrometer

Problem: A cylindrical light guide with internal transparency is required to allow ultraviolet light to pass through the liquid sample without coming into contact with the metal.  

Solution: Customize a quartz round tube/rod assembly with an inner diameter of 10mm, an outer diameter of 14mm, and a length of 200mm for customers. The end face is precision polished and can be directly used as a flow cell. It is corrosion-resistant and has no background fluorescence.

Customer Application Case (Anonymous)

Case 1: A high-end laser equipment manufacturer in Europe

-Requirement: Diameter 6mm × 300mm, bubbles within the light aperture<50 μ m, end face parallelism<10 arcseconds.  

-Problem: The original supplier was unable to simultaneously meet the requirements of high aspect ratio and high parallelism, resulting in a laser coupling efficiency of only 72%.  

-Our solution: using core rod precision grinding+double end face grinding process, providing samples for testing, the coupling efficiency is improved to 94%.  

-Result: Bulk ordering for the new generation of medical lasers.

Case 2: A listed semiconductor equipment company

-Requirement: A 125mm × 800mm diameter quartz round rod is required as a supporting roller inside the high-temperature furnace tube, with a resistance to 1200 ℃ and an outer diameter tolerance of ± 0.1mm.

-Problem: The original ceramic rollers wear and produce particles at high temperatures, contaminating the process chamber.  

-Our solution: Provide ultra large diameter quartz round rods, finely ground on the surface and then flame polished to reduce the friction coefficient.  

-Result: After 2 months of installation verification, there were no particle issues, and the standard BOM has been imported.

Case 3: Physics Research Institute of a well-known university

-Requirement: A miniature quartz round rod with a diameter of 2mm × 50mm, one end ground into a hemispherical shape and the other end with M2 thread, used for fiber coupling in low-temperature strong magnetic field experiments.  

-Difficulty: Multiple quartz factories are unable to process M2 internal threads (quartz is brittle and prone to cracking).  

-Our solution: Using customized diamond grinding heads, M2 × 0.4 internal threads are machined on quartz round rods with a pass rate of over 95%.  

-Result: Collaborative customization of multiple miniature optical components.

Why choose us?

-Full size coverage: 1-300mm diameter, no need for splicing or compromise design.  

-True customization: not just cutting length, but supporting complex geometric shapes such as outer diameter, inner hole, thread, step, ball head, taper, etc.  

-Optical grade quality control: Each round rod undergoes transparency, size, and surface defect testing, and material reports are provided.  

-Small order friendly: We can produce 1 unit during the research and development phase, and can deliver 10000 units during the mass production phase.  

-Global shipping: DHL/FedEx fast shipping, providing export packaging and customs clearance support.

Whether you need a 2mm miniature round rod for prototype validation or a 300mm large high-temperature structural component, simply provide the drawings or usage requirements, and we will provide you with a technical solution and quotation within 24 hours. Click to consult, or send your requirements to our email/official website message, so that your design is no longer limited by the size and performance of standard parts.

Luverre Quartz is committed to providing customers with high-quality and high-precision optical cylindrical quartz rods, and meeting the needs of different application scenarios through customized services. If you have any special needs or questions, please feel free to contact us at any time.

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.