Precision Optical Substrates & Capillary Elements
Engineered fused quartz, capillary channels, and custom optical reflectors machined under sub-micron CNC tolerances for mission-critical industrial optics.
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View SpecificationsMacro-Industry Solutions & Engineered Precision Redrawing
Deploying high-purity synthetic fused silica (SiO₂ ≥ 99.99%) to solve severe thermal stress, extreme UV transmission loss, and fluid shear instability in modern analytical architectures.
Chromatography & Capillary Electrophoresis
Modern Capillary Zone Electrophoresis (CZE) and nano-LC demand ultra-smooth inner bore surfaces with internal surface roughness Ra < 0.05 μm. Our micro-capillaries mitigate peak tailing, stabilize electroosmotic flow (EOF), and maintain mechanical endurance up to 10,000 psi operating pressure.
Genomics & In-Vitro Diagnostics (IVD)
Fluorescence detection across DNA sequencers requires zero background autofluorescence. Fabricated using high-grade JGS1 synthetic silica, our capillary channels exhibit total optical clarity from deep UV (185 nm) through near-infrared, maximizing signal-to-noise ratios in digital PCR flow-cells.
Fiber Optics & Precision Alignment Sleeves
For multi-core fiber splicing, fiber collimators, and PLC splitters, our precision-redrawn capillary ferrules achieve inner diameter tolerances down to ±0.5 μm and concentricity < 1 μm, eliminating insertion loss and angular misalignment across critical communication interfaces.
Fused Silica vs. Borosilicate: Engineering Comparison
Rigorous baseline characterization enables hardware architects to select the exact thermal, physical, and optical parameters matching dynamic operating environments.
| Performance Parameter | JGS1 Synthetic Fused Silica | JGS2 / Optical Grade Quartz | Borosilicate Glass 3.3 |
|---|---|---|---|
| Optical Spectral Transmission | 185 nm – 2,500 nm (Deep UV/Vis) | 220 nm – 2,500 nm (Standard Opt) | 350 nm – 2,500 nm (Visible/NIR) |
| Thermal Expansion Coeff. (CTE) | 5.5 × 10⁻⁷ / °C (Extreme Thermal Shock Proof) | 5.5 × 10⁻⁷ / °C | 32.5 × 10⁻⁷ / °C |
| Max Continuous Service Temp. | 1,100 °C (Short excursions 1,300 °C) | 1,050 °C | 450 °C (Short excursions 500 °C) |
| Internal Surface Roughness (Ra) | < 0.03 μm (Mirror redrawn finish) | < 0.05 μm | < 0.08 μm |
| Hydrolytic Resistance / Leaching | Class I (Zero alkali metal elution) | Class I (Trace elements) | Type I Neutral (Minor ion leach) |
| Dielectric Strength | 25–40 kV/mm | 25–35 kV/mm | 15–20 kV/mm |
Global Industrial Landscape & Commercial Realities
Navigating raw material security, microfabrication lead-time bottlenecks, and dual-sourcing requirements in mission-critical manufacturing.
Bore Diameter Precision
Thermal Endurance Limit
In-Line Optical Inspection
Engineering DFM Turnaround
Silicon & Analytical Independence
Global instrument vendors face compounding lead-time volatility when relying on single-source Western fabrication houses. TianJin BY Photonics bridges this gap with comprehensive vertically integrated production: drawing furnace control, mechanical sizing, and end-face optical polishing all under one roof.
OEM Direct-to-Line Reliability
Modern automated pick-and-place lines cannot tolerate dimensional drift. Our computerized dual-axis laser micrometer monitoring checks OD and ID concentricity in real time during redrawing, preventing capillary clogging or fracture during automated robotic assembly.
Cleanroom Clean Packaging
Sub-millimeter dust contamination ruins capillary fluid dynamics. All BY Photonics micro-capillary tubes undergo ultrasonic organic de-greasing, ultrapure deionized water flushing, and vacuum sealing inside cleanroom environments to ensure pristine arrival.
Localized Support & International Regulatory Standards
Our engineering and QA operations conform strictly to international frameworks across North American, European, and Asian life-science and defense sectors.
Direct FAE Engineering
Consult directly with experienced glassworking process engineers. From geometry adjustments to CAD/drawings (STEP, DWG, DXF) to laser-dicing feasibility, receive technical feedback within 24 hours.
RoHS & REACH Certified
Zero toxic heavy metals, lead-free composition, and 100% compliant with EU RoHS Directives 2011/65/EU and REACH (EC 1907/2006). Full lot material certifications provided per shipment.
ISO 9001:2015 Operations
Standardized manufacturing protocols govern redrawing furnaces, cutting setups, dimensional metrology, and flame-polishing lines to ensure multi-batch uniformity across multi-year purchase orders.
Secure Global Logistics
Custom vibration-damped packaging engineered to absorb shock and pressure variations during intercontinental air freight, guaranteeing zero breakage straight to your assembly line.
Engineering Use Cases & Real-World Deployments
Field-proven installations demonstrating how sub-micron quartz micro-capillary channels solve difficult fluidic and optical challenges.
Square & Multi-Bore Micro-Channels
For specialized cytometric laser interrogation windows, cylindrical tubes create lensing distortions. We draw custom square-bore micro-capillaries providing flat optical viewing surfaces with zero geometric refraction, maximizing detection accuracy in high-speed flow cytometry.
Fluorine-Doped Waveguide Sleeves
By doping the outer quartz capillary cladding with fluorine, we engineer a lower refractive index than standard fused silica. This allows the micro-capillary to act simultaneously as a microfluidic transport channel and a low-loss optical waveguide for evanescent wave spectroscopy.
Extreme Thermal Sensor Well Jackets
In semiconductor CVD and furnace profiling, fragile micro-thermocouples require shielding from corrosive gas chemistries and temperatures over 1,000 °C. Our high-purity single-ended closed capillaries deliver robust protection without thermal lag.
Technology Roadmap & Engineering Horizons
Pioneering the next generation of micro-optics and fluidic architectures through proprietary process innovation.
Sub-0.3 μm Dimensional Tolerancing
Refining high-frequency thermal draw towers using multi-zone induction heaters to tighten outer and inner bore tolerances down to ±0.3 μm across sustained 100-meter capillary canes, virtually eliminating batch variation.
Laser-Microstructuring & Fusion Splicing
Integrating picosecond laser ablation to machine precise microscopic lateral windows, side-ports, and flow injection apertures directly into micro-capillary walls without inducing sub-surface micro-cracks or weakening burst pressure.
Hybrid Metalized & Bio-Functional Capillaries
Advancing atomic layer deposition (ALD) and magnetron sputtering of gold, titanium, and hydrophobic nanocoatings on internal capillary walls to support integrated Surface Plasmon Resonance (SPR) biosensing on-chip.
Frequently Asked Technical Questions
Critical engineering criteria, chemical tolerances, and procurement specifics for quartz micro-capillaries.
What is the absolute minimum inner diameter (ID) and wall thickness BY Photonics can produce?
Through precision micro-redrawing, we reliably achieve inner diameters as small as 5 μm (0.005 mm) with outer diameters from 50 μm to several millimeters. Custom wall thicknesses can be dialed in from 15 μm up to heavy-walled capillary tubing designed to resist high internal pressures exceeding 15,000 psi.
How does BY Photonics guarantee zero micro-fracturing on cut capillary end-faces?
Standard mechanical cleaving can produce chipped edges and crack propagation. BY Photonics employs advanced CO₂/picosecond laser cutting and diamond wheel optical end-face polishing. This delivers a square, chip-free 90° end face with surface roughness down to Ra < 0.05 μm, critical for high-efficiency optical coupling and clean fluid seal faces.
Can you provide polyimide or fluoropolymer outer protective coatings on micro-capillaries?
Yes. We supply bare synthetic fused silica capillaries as well as polyimide-coated capillaries. The polyimide outer layer confers flexible mechanical strength and bendability, protecting the silica from atmospheric moisture and handling damage while allowing service temperatures up to 350 °C - 400 °C.
What quality documentation and metrology data are delivered with production shipments?
Every batch includes full Certificate of Conformity (COC), raw material spectral and chemical traceability certificates, and dimensional measurement reports generated via high-resolution optical video measuring systems (VMS) measuring ID, OD, ovality, and wall concentricity.
High-Performance Laser & Analytical Components
Explore our production capabilities across capillary glass, laser cavity assemblies, sapphire viewing elements, and ceramic reflectors.
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