Cr⁴⁺:YAG (Chromium-doped Yttrium Aluminum Garnet) crystals are widely used as saturable absorbers for passive Q-switching in Nd:YAG and other 1.06 µm solid-state laser systems.By modulating intracavity losses automatically, Cr⁴⁺:YAG enables short, high-peak-power pulses without external electro-optic components. Our Cr⁴⁺:YAG crystals are laser-grade, offering excellent optical uniformity, stable absorption characteristics, and high damage threshold for long-term reliable operation. Key Features Passive Q-switching at 1064 nm No external driver or electronics required High peak power pulse generation High optical damage threshold Stable absorption and long service life Laser-grade optical polishing Multiple initial transmission options available Typical Specifications Material: Cr⁴⁺:Y₃Al₅O₁₂ (Cr⁴⁺:YAG) Function: Saturable absorber / passive Q-switch Operating wavelength: 1040–1100 nm (optimized for 1064 nm) Initial transmission (T₀): 70%, 80%, 90%, 95% (custom available) Crystal orientation: ⟨111⟩ Surface quality: 10/5 or 20/10 scratch-dig Flatness: λ/10 – λ/4 Polishing: Double-side optical polish Coatings: AR @ 1064 nm (optional) Applications Passive Q-switched Nd:YAG lasers Compact DPSS laser modules Range finders and LIDAR systems Marking and micro-processing lasers Scientific and industrial laser sources Customization & Fabrication We offer: Custom crystal dimensions and thickness Adjustable initial transmission (T₀) AR coatings at 1064 nm Precision cutting and polishing OEM and bulk orders Please contact us with your laser cavity parameters for optimal selection. Research & Industry Support Academic and university discounts available Tax-exempt purchasing supported Technical consultation for cavity design Shipping & Lead Time In-stock items: Ship within 1–2 business days Custom orders: Typical lead time 2–3 weeks Secure optical packaging for laser components .cryag-faq details { border: 1px solid #ddd; border-radius: 6px; padding: 14px 18px; margin-bottom: 12px; background: #fafafa; } .cryag-faq summary { font-weight: 600; cursor: pointer; font-size: 16px; } .cryag-faq p { margin-top: 10px; line-height: 1.6; } Cr⁴⁺:YAG Passive Q-Switch – FAQ What is Cr⁴⁺:YAG used for? Cr⁴⁺:YAG is used as a saturable absorber for passive Q-switching in Nd:YAG and other 1.06 µm laser systems. What initial transmission (T₀) should I choose? Lower T₀ (70–80%) produces higher pulse energy, while higher T₀ (90–95%) offers higher repetition rates. We can help you select the optimal value. Do you offer AR coatings? Yes. AR coatings at 1064 nm are available to reduce cavity losses. Do you offer custom sizes? Yes. Thickness and aperture can be customized to match your laser cavity design. What is the typical lead time? In-stock items ship in 1–2 business days. Custom fabrication typically requires 2–3 weeks.
