Er:YAG (Erbium-doped Yttrium Aluminum Garnet) laser crystals are the industry standard gain medium for 2940 nm mid-infrared lasers, a wavelength that coincides with the peak absorption of water.This unique property enables extremely precise tissue ablation with minimal thermal damage, making Er:YAG the preferred crystal for medical, dental, and dermatological laser systems. Our Er:YAG crystals are manufactured to laser grade, offering high optical uniformity, low absorption loss, and precision polishing for reliable and repeatable medical-laser performance. Key Features Laser emission at 2940 nm (strong water absorption peak) Minimal thermal damage to surrounding tissue High optical homogeneity and purity Laser-grade optical polishing High damage threshold and mechanical stability Custom sizes, dopant levels, and coatings available Typical Specifications Material: Er³⁺:Y₃Al₅O₁₂ (Er:YAG) Dopant concentration: 0.5% – 1.5% (custom available) Laser wavelength: 2940 nm Pump wavelength: ~1530–1600 nm Crystal orientation: ⟨111⟩ Surface quality: 20/10 scratch-dig Flatness: λ/10 – λ/4 Parallelism: < 10 arcsec Polishing: Double-side optical polish Coatings: AR @ 2940 nm (optional) Applications Medical laser systems Dental lasers Dermatology and cosmetic lasers Surgical tissue ablation Mid-infrared spectroscopy Biomedical research Customization & Fabrication We support full customization: Rods, slabs, discs, and custom geometries Dopant concentration adjustment AR coatings at 2940 nm Precision cutting and polishing OEM and bulk orders Please contact us with your technical requirements or drawings. Medical & Research Support Support for medical device developers University and research lab discounts Technical consultation available Tax-exempt purchasing supported Shipping & Lead Time In-stock items: Ship within 1–2 business days Custom orders: Typical lead time 2–3 weeks Secure optical packaging for medical-grade components .eryag-faq details { border: 1px solid #ddd; border-radius: 6px; padding: 14px 18px; margin-bottom: 12px; background: #fafafa; } .eryag-faq summary { font-weight: 600; cursor: pointer; font-size: 16px; } .eryag-faq p { margin-top: 10px; line-height: 1.6; } Er:YAG Laser Crystal – FAQ What wavelength does Er:YAG operate at? Er:YAG lasers operate at 2940 nm, which corresponds to the peak absorption of water. Why is Er:YAG widely used in medical and dental lasers? The 2940 nm wavelength is strongly absorbed by water, enabling precise tissue ablation with minimal thermal damage. What dopant concentrations are available? Typical Er:YAG concentrations range from 0.5% to 1.5%. Custom concentrations are available upon request. Do you offer custom sizes or shapes? Yes. We provide rods, slabs, discs, and custom geometries based on your system design. Are AR coatings available? Yes. AR coatings at 2940 nm are available to reduce surface reflection and improve efficiency. What is the typical lead time? In-stock items ship in 1–2 business days. Custom fabrication typically requires 2–3 weeks.
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