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China, Chinese Dia9.0mm Uncoated Fused Silica Enhanced Brewster Window Optical Brewster Window1 Industrial Products Supplier Manufacturer Details, price list catalog:
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Optical Lens InstrumentOptical MirrorOptical WindowBrewster Window
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Product DescriptionProduct DescriptionBrewster Windows: Enhancing Efficiency in External-Cavity Gas Lasers1. Core Function:Brewster windows minimize reflection losses at the ends of external-cavity gas lasers by exploiting the Brewster angle—a specific incidence angle where p-polarized light experiences zero reflection. This ensures maximum transmission of the laser's polarized output, boosting efficiency.2. Design & Material:Material: High-quality optical glass or UV-grade quartz (for durability and low absorption). Angle: Precisely cut and mounted are the refractive indices of the cavity medium (e.g., gas) and the window material. For quartz (n ≈ 1.46) in air. Orientation: Tilted so the laser's p-polarized electric field lies in the plane of incidence, eliminating Fresnel reflections. 3. Key Benefits:Loss Reduction: Reflection drops from ~4% (normal incidence) to <0.1% per surface for p-polarized light. Polarization Purity: The cavity selectively amplifies p-polarized light, producing a linearly polarized beam without additional optics. Power Stability: Lower intracavity losses enhance output power and long-term stability, critical for precision applications. 4. Applications:Helium-Neon (HeNe) Lasers: Widely used in interferometry, barcode scanners, and holography. Argon Ion Lasers: For high-power visible/UV applications like flow cytometry or semiconductor wafer inspection. Frequency-Tunable Systems: External-cavity configurations (e.g., Littrow gratings) rely on Brewster windows to maintain narrow linewidths and tunability without polarization degradation. 5. Technical Considerations:Surface Quality: λ/10 flatness and 10-5 scratch-dig specs prevent scattering losses. Coating: Typically uncoated (to avoid angle-dependent coating defects), but anti-reflection coatings may be added for dual-wavelength systems. Thermal Stability: Quartz windows tolerate high-power UV lasers without thermal lensing. 6. Trade-Offs:s-Polarization Loss: s-polarized light suffers higher reflection (~20% per surface), so the laser must operate in p-polarization only. Alignment Sensitivity: Angular tolerance is ±0.5°; misalignment increases losses and introduces elliptical polarization. Conclusion:Brewster windows are a cost-effective, passive solution to maximize laser efficiency and polarization purity, indispensable for low-gain gas lasers where every photon counts.Advanced FeaturesKey Features of Brewster Windows in Laser Systems1. High Transmittance for P-Polarized LightAt the Brewster angle, P-polarized light (polarized parallel to the plane of incidence) experiences zero reflection loss, achieving 100% transmission through the window. This maximizes laser efficiency by minimizing energy loss at optical interfaces. 2. Polarization SelectivityBrewster windows naturally filter light to allow only P-polarized light to pass efficiently. This is crucial for polarization-controlled lasers, especially in applications requiring linear polarization. 3. Reduced Reflection LossesBy aligning the window at the Brewster angle, reflection losses are minimized across the interface.This is especially beneficial in laser resonators, where even small losses can degrade performance. 4. Management of Reflected LightAny residual reflected light (mostly S-polarized) is directed out of the resonator cavity, preventing standing waves or interference effects that could destabilize the laser mode. Additional Notes:Brewster windows are commonly used in gas lasers (e.g., He-Ne lasers) to introduce polarization without extra coatings. They are typically made from high-quality optical glass or UV-grade fused silica, depending on the wavelength. SpecificationMaterial:UVFS, N-BK7Dimensions:from 2mm to 400mm, customized according to requirementsThickness0.2 to 50mm (subject to dimensions)Dimension/Thickness Tolerance:up to 0.02mmParallelism:up to 3arcsecTWD:up to 1/10L PV@633nmSurface Quality:up to 10-5Clear Aperture:>90% centeredCoatings:AR coating from UV-IRFactory AdvantagesAs a total solution provider on Optics, we can match your different demands as below optical components:Production LineCompany HistoryFAQQ: What are your main products?A: Optical Components: Aspherical Lenses, Spherical Lenses, Cylindrial Lenses, Lens Assemblies, Optical Windows, Optical Mirrors, Optical Prisms, Optical Filters, and Other Special Shaped Optics...... Q: What's your MOQ?A: Normally one piece. If more, we can talk about discount. You can ship with other parts together .Q: How about the delivery time?A: For stocks, within one week after the payment. As to customized products, the delivery time will be negotiated according to your requirements. Q: Can i get a sample to check the quality?A: YES, we are glad to provide samples for your test. And there is discount for Trade Assurance Sample Order. Q: Can you offer OEM service?A: YES. We will custom the material, specifications and optical coatings for your optical components as your requirements. Q: How to pay?A: T/T, L/C, Western Union, Cash, Credit Card, Paypal, Alipay, MoneyGram, Assurance payment...... Q: What's the way of shipping?A: We accept DHL, Fedex, TNT, UPS, EMS, SF and etc. If you have your own express number, it's great. Q: How to guarantee the quality of your products? A: 1) Strict detection during each production process. 2) Advanced metrology solutions: ZYGO, Mitutoyo, Agilent, TAYLOR HOBSON, TRIOPTICS, MOELLER-WEDEL.....3) Strict inspection on products before shipment and intact product packaging ensured. Q: Any other good service your company can provide?A: 24-hour after-sale service and long-time maintenance......Accepted delivery terms: FOB, CIF, EXW, DDU, DDP, Express..... Accepted payment currencies: USD, EUR, RMB...... Accepted Languages: English, Japanese, Chinese, Spanish, Russian.....Payment MethodsT/T, L/C, Western Union, Cash, Credit Card, Paypal, Alipay, MoneyGram, Assurance payment......
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