🔭 Beam Expanders by Yighen

Custom Optical Beam Expansion Systems for Laser, Sensing & Metrology Applications

🌟 What Is a Beam Expander?

A beam expander is an optical device that increases the diameter of a collimated light beam—typically a laser—while maintaining its collimation and reducing divergence. This improves beam quality, focusability, and alignment accuracy in optical systems.

Yighen offers custom-designed beam expanders optimized for wavelengths ranging from UV (355 nm) to IR (2.5 µm), tailored to your system’s laser type, power level, and spatial constraints.

🔍 Key Features & Advantages

✅ Magnification range from 1.5× to 20×
✅ Fixed & variable magnification models
✅ Wavelength-specific AR coatings: UV, VIS, NIR, SWIR, CO₂
✅ Diffraction-limited performance – M² preserved
✅ Galilean & Keplerian configurations
✅ Low wavefront distortion < λ/10 @ 632.8 nm
✅ High-power compatible (up to 5 J/cm² @ 1064 nm)
✅ Compact, rugged opto-mechanical designs

⚙️ Technical Capabilities – Beam Expander Specs

🔧 Yighen designs beam expanders for use with:

• DPSS lasers (532 nm, 1064 nm)

• CO₂ lasers (10.6 µm)

• Fiber & diode lasers

• SWIR & IR sensing modules

🧪 In-House Precision Manufacturing

As a vertically integrated optics supplier, Yighen supports:

🔷 Diamond-turned lens shaping (ULC-100F(S): Ra 0.001 µm)
🔷 Precision IR materials machining – ZnSe, CaF₂, Germanium
🔷 Cleanroom lens assembly & bonding
🔷 Coating chambers for AR/DLC coatings
🔷 Interferometric testing & wavefront measurement

💡 We also offer beam expander reverse engineering and performance tuning for legacy systems.

💼 Typical Applications

📈 Case Study: 5× UV Beam Expander for Precision Lithography

Client: Semiconductor equipment OEM
Need: Beam expansion for 355 nm UV laser, with λ/10 wavefront quality
Solution: Fused silica Keplerian expander, 5× mag, anti-laser-damage coating
Result: 40 mm output beam with <1 mrad divergence & >99.2% transmission

🏢 Why Yighen?

• 🌍 Hong Kong HQ – Optical design & customer engineering

• 🏭 Dongguan Factory – Full-capability optics machining & QA

• 🔬 Singapore Center – Ultra-precision freeform & metrology

🛠️ We support low-volume prototyping, batch manufacturing, and OEM-scale production with stable quality and traceability.

🧾 Certifications & Delivery

✅ ISO 9001 & 13485 Certified
📄 Documentation: Coating curves, drawings, testing data
🚚 Lead Time: 2–3 weeks for standard models, 4–6 weeks for custom optics
📦 Packaging: Shock-proof, anti-dust, ready for integration

🔧 Expand, Collimate, and Control with Yighen Beam Optics

Whether you're aligning a laser system, optimizing beam divergence, or improving spot size in processing applications—Yighen's beam expanders deliver unmatched stability and optical clarity across UV, visible, and IR ranges.

📩 Request a Custom Beam Expander
Let us know your input/output beam diameter, wavelength, expansion ratio, and mounting needs—we'll deliver an optimized solution for your system.

📘 Access Drawings & Coating Specs
Visit our Downloads page for detailed CAD files, LIDT specs, and broadband AR coating options.

🏢 Explore Our Expertise
Learn more about Yighen's laser optics engineering and ultra-precision machining capabilities on the About page.

🔗 Related Content

• 🔦 Collimating Lenses
  Use in conjunction with beam expanders for precise beam shaping and control.

• 🧪 Laser Optics
  Our complete lineup of optics designed for high-power laser applications.

• 🧩 Opto-Mechanical Modules
  Custom assemblies that integrate beam expanders into larger optical systems.

• 🔍 Optical Coating Services
  High-durability AR and V-coatings for laser and broadband transmission optics.

• 🔬 Optical Metrology & Testing
  Ensure beam quality, divergence accuracy, and wavefront flatness are verified.