Quartz rod, especially high-purity fused silica rod, has become the cornerstone material in high-end optical systems with its ultra wide spectrum from deep ultraviolet to near-infrared, high transmittance, extremely low thermal expansion coefficient and excellent chemical stability. Whether as the core component of lithography machines or the transmission medium of high-power lasers, its pure materials and precise processing technology ensure the stability and efficiency of the optical path in extreme environments, making it an ideal choice for achieving precision optical design.

Addressing key optical challenges

In precision optical applications, any minor defects in materials can lead to a decrease in the performance of the entire system. Our quartz rod products are designed to solve these core problems:

Eliminating beam distortion to ensure imaging and transmission quality: By controlling the uniformity of refractive index inside the material, wavefront distortion can be effectively reduced, ensuring the stability of the M ⊃2; factor of the laser beam or improving the clarity of the optical imaging system.

Resist thermal effects and maintain stability at high power: The extremely low coefficient of thermal expansion and excellent thermal shock resistance make it almost deformation free in high-energy lasers or high-temperature environments, fundamentally suppressing the "thermal lens effect" and ensuring long-term stability of the focal position.

Realize full spectrum applications and broaden device functional boundaries: from deep ultraviolet at 193nm to near-infrared at 4500nm, all bands have high transmittance, enabling a single optical component to handle multi band work and meet various complex requirements such as spectral analysis and UV curing.

Eliminate impurity interference and improve signal-to-noise ratio: Ultra high purity synthetic quartz material (with metal impurity content below ppb level) can effectively avoid fluorescence background and parasitic absorption caused by impurities, and obtain purer signals in applications such as Raman spectroscopy and fluorescence detection.

Optical properties of quartz rod

Our quartz rod has become the preferred choice for many high-end devices due to its outstanding performance in the following dimensions:

Ultra wide spectrum and high transmittance

The material exhibits excellent optical properties in the ultraviolet (UV), visible light (VIS), and infrared (IR) bands. Through a special synthesis process, we can provide materials with high hydroxyl groups (suitable for the ultraviolet band, with low absorption) or low hydroxyl groups (suitable for the infrared band, with weak absorption peaks) to ensure maximum transmittance at specific wavelengths. For example, at a wavelength of 254nm, the transmittance of a 10mm thick quartz rod can reach over 85%.

Ultimate purity and optical uniformity

By adopting advanced synthetic quartz technology instead of simple natural crystal melting, the total content of metal impurities (such as Li, Na, K, etc.) in the material can be controlled below 0.01ppm. This ultimate purity, combined with precise annealing process, ensures that there are no stripes or bubbles inside the material, and the refractive index is highly uniform, providing a perfect optical medium for high-end lithography, interferometry and other applications.

Excellent thermal stability and resistance to laser damage

The softening point of quartz rod is as high as 1730 ℃, and it can work in an environment of 1100 ℃ for a long time. Its coefficient of thermal expansion is only 5.5 × 10 ⁻⁷/℃, which means that its size and shape remain almost unchanged under drastic temperature changes. At the same time, the material has a very high laser damage threshold and can withstand the impact of kilowatt level continuous lasers, making it an ideal choice for high-power laser processing equipment.

Comprehensive customization service: Your specifications, our standards

We are well aware that standardized products cannot meet the unique needs of all optical designs. Therefore, we offer highly flexible customized services to turn your drawings into reality.

Size customization: From capillary quartz rods with a diameter of 1mm to solid quartz rods with a diameter exceeding 100mm, the longest length can reach 3000mm. We also provide irregular cross-section rods such as square and oval.

Precision customization: The outer diameter tolerance can be strictly controlled within ± 0.05mm to ensure perfect matching with the optical system.

Customized Processing: We provide CNC precision machining services, including drilling, milling, chamfering, slotting, and other complex geometric shapes.

Surface treatment: Various surface treatment processes such as grinding, polishing, flame polishing, etc. can be provided according to needs to meet different optical and mechanical requirements.

Application case:

Case 1: Upgrading 4kW fiber laser cutting head to solve the problem of focus drift

Customer background: A well-known European laser equipment manufacturer.

Problem faced: In its 4kW fiber laser cutting equipment, the original optical components will undergo thermal deformation due to absorbing a small amount of laser energy after long-term full load operation, resulting in drift of the focal position and roughness of the cutting surface, seriously affecting processing accuracy and efficiency.

Our solution: We provide customized low hydroxyl, high-purity synthetic quartz rods for our customers. By optimizing the absorption coefficient of the material at a wavelength of 1064nm and strictly controlling the uniformity of its geometric dimensions, it is ensured that the energy distribution is uniform and the thermal effect is minimized when the laser is transmitted inside the rod.

Final result: After the equipment upgrade, there was no measurable drift in the focal position during the continuous 8-hour full load operation test, and the smoothness of the cutting section was improved by 30%.

Case 2: Assisting deep ultraviolet Raman spectrometer to capture weak signals

Customer background: A top materials science research institution.

Facing the problem: When building a deep ultraviolet Raman spectroscopy system, there is an urgent need for a light guiding material with extremely high transmittance below 240nm and no fluorescence background. Ordinary optical glass absorbs heavily in this wavelength band and produces strong fluorescence, completely submerging the intrinsic Raman signal of the sample.

Our solution: We have prepared high hydroxyl content quartz rods for our customers using a special synthesis process. High hydroxyl groups can effectively saturate oxygen vacancy defects in quartz structures, significantly improve their transmittance in the deep ultraviolet band, and maximize the suppression of fluorescence phenomena.

Final result: The customer successfully utilized our quartz rod to collect clear and pure intrinsic Raman signals of the substance.

Why choose us

We are not only a manufacturer of quartz products, but also your trusted partner for optical material solutions. From the synthesis and purification of raw materials to precision machining and strict quality inspection, every step embodies our ultimate pursuit of quality. We have advanced plasma melting technology and precision CNC machining centers, which can provide you with comprehensive services from standard products to highly customized products, ensuring that every delivered product can perfectly match your application needs.

What kind of quartz rod do you need for your optical design?

Whether it's standard specifications or special customization, please feel free to contact us anytime for technical consultation and exclusive pricing. Let us use our professional material knowledge to help you achieve even better optical performance!

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.