Metric showing ablationThreshold with value 2.1 J/cm², ranging from 2 to 6 J/cm². Press Enter or Space to search for this metric.
Ablation Threshold
Current value: 2.1 J/cm². Range: 2 to 6 J/cm². Progress: 3% of maximum.
2.1
J/cm²
Quartz Glass Laser Cleaning
Precision laser cleaning restores quartz glass transparency without risking thermal fractures
Ikmanda RoswatiPh.D.
Ultrafast Laser Physics and Material Interactions
Indonesia
Properties: Quartz Glass vs. other glasses
Laser-Material Interaction
Material Characteristics
Other Properties
Machine Settings: Quartz Glass vs. other glasses
Quartz Glass surface magnification
Laser cleaning parameters for Quartz Glass
Before Treatment
Under microscopy, the quartz glass surface appears very-very contaminated, with fine dust particles and oily residues scattered everywhere and then clustered in spots. Contaminants show irregular shapes, sizes from nanometers to microns, sticking tightly and blocking transparency. Surface degradation is evident: micro-pits form, edges roughen, and overall smoothness is lost, so the material looks dull and weakened.
After Treatment
After ultrafast laser cleaning, the quartz glass surface appears very-very smooth and clean, with dirt removed then shine restored quickly. Integrity stays strong, no cracks or damage seen, so material looks like new. Process cleans effectively and preserves optical properties well.
Quartz Glass Laser Cleaning FAQs
Can quartz glass be damaged by laser cleaning systems, and what power/wavelength settings are safe?
Quartz glass withstands up to 2.5 J/cm² fluence without damage. For safe operation, use a 1064 nm near-IR wavelength and maintain average power below 100 W to prevent devitrification. Proper parameter control ensures effective contaminant removal while preserving the substrate's structural integrity.
Why is quartz glass used for laser cleaning system components like protective windows and lenses?
Quartz glass components maintain optical clarity from UV to IR wavelengths while withstanding intense laser exposure up to 2.5 J/cm². Its exceptionally low thermal expansion coefficient of 0.55 ppm/°C provides remarkable thermal stability, ensuring dimensional integrity during high-power 100W operations. This combination of high transmission and laser damage resistance makes it indispensable for protective windows and focusing lenses in cleaning systems.
How do you clean laser-contaminated quartz optics without damaging them?
For quartz optics, use nanosecond pulses at 1064 nm wavelength with fluence below 2.5 J/cm². This selectively ablates contaminants while the substrate's high transparency prevents damage. Follow with isopropyl alcohol and lint-free wipes for final residue removal.
What happens if laser cleaning is performed on contaminated quartz glass surfaces?
Contaminants like metallic particles absorb the 1064 nm laser energy far more than quartz, causing intense localized heating. This thermal shock can induce stress exceeding the material's fracture toughness, leading to micro-cracks. Precise fluence control below ~2.5 J/cm² is critical to avoid this damage.
Does quartz glass transparency affect laser cleaning effectiveness and safety?
Quartz glass's high 1064 nm transparency demands precise fluence control near 2.5 J/cm² to avoid beam transmission through thin sections. This transparency also necessitates stringent eye protection, as the laser energy can pass through the material directly.
How does quartz glass compare to other materials like sapphire for laser system windows?
Quartz glass offers superior UV transmission and thermal shock resistance up to 1100°C, while sapphire provides greater hardness. For our standard 1064 nm laser cleaning at 2.5 J/cm², fused silica's lower cost and adequate durability are often optimal.
What are the signs of quartz optic degradation in laser cleaning systems?
Clouding and discoloration indicate cumulative thermal damage from excessive fluence above 2.5 J/cm². This increases scatter, reducing transmission efficiency and cleaning performance. Pitting and coating damage from incorrect 50% overlap also compromise the optic's integrity.
Can laser cleaning remove coatings or deposits from quartz surfaces without damaging the substrate?
Ya, pembersihan laser dapat menghilangkan deposit dari permukaan kuarsa tanpa merusak substrat. Dengan fluence 2,5 J/cm² dan panjang gelombang 1064 nm, energi diserap lapisan namun ditransmisikan kaca, mempertahankan sifat optiknya. Kontrol proses yang ketat sangat penting.
What safety precautions are needed when laser cleaning near quartz components?
Maintain fluence below 2.5 J/cm² to prevent quartz substrate damage. Employ beam dumps and full optical enclosures to manage hazardous reflections and contain ejected debris. Continuously monitor for surface degradation, as even minor contamination can lead to localized heating and irreversible optic damage under the 1064 nm wavelength.
How does quartz glass purity (fused silica vs. natural quartz) affect laser cleaning applications?
Fused silica's superior UV transmission and low OH content (<5 ppm) enables efficient 1064 nm laser cleaning at 2.5 J/cm² without thermal stress. Natural quartz, with higher impurity inclusions, risks localized absorption and micro-fractures, compromising process integrity and potentially damaging the substrate at standard laser parameters.
Regulatory Standards & Compliance
FDA
FDA 21 CFR 1040.10 - Laser Product Performance Standards
ANSI
ANSI Z136.1 - Safe Use of Lasers
IEC
IEC 60825 - Safety of Laser Products
OSHA
OSHA 29 CFR 1926.95 - Personal Protective Equipment
