Co:Spinel (Co²⁺:MgAl₂O₄) is a cobalt-doped magnesium aluminate spinel crystal widely used as a passive Q-switch and saturable absorber for mid-infrared solid-state lasers, particularly in the 1.2–1.6 μm wavelength range. Owing to its broad absorption bandwidth, high optical damage threshold, and excellent thermal and mechanical stability, Co:Spinel is a preferred material for compact, high-power, and high-reliability laser systems. Co:Spinel crystals are commonly integrated into Er:YAG, Tm:YAG, Ho:YAG, and Cr:ZnSe laser systems, enabling short pulse generation without the need for active electro-optic components. The robust spinel host provides superior hardness, chemical resistance, and long-term operational stability, even under high peak power conditions. Key Features & Advantages Broad absorption band (≈1200–1600 nm) Excellent passive Q-switch performance High optical damage threshold Fast recovery time Superior thermal conductivity High mechanical strength & chemical stability No external electronics required Typical Applications Passive Q-switches for Er:YAG / Tm:YAG / Ho:YAG lasers Mid-IR pulsed solid-state laser systems Compact and rugged laser sources Medical, industrial, and scientific laser platforms Defense and LIDAR laser systems Available Specifications (Customizable) Crystal form: Round, square, or custom geometry Dimensions: Custom diameter, thickness, or slabs Doping concentration: Custom Co²⁺ levels Surface quality: Optical polish (laser-grade) Orientation: As-cut or orientation-controlled Coatings: AR coating available upon request Why Choose Our Co:Spinel Crystals? We provide research-grade and laser-grade Co:Spinel crystals with strict control over doping uniformity, optical quality, and surface finish. Custom dimensions, coatings, and specifications are available to support R&D laboratories, universities, and industrial laser manufacturers. .product-faq { margin-top: 12px; } .product-faq h2 { font-size: 1.4rem; margin-bottom: 22px; } .product-faq details { border: 1px solid #e5e5e5; border-radius: 8px; margin-bottom: 12px; padding: 14px 18px; background: #fafafa; transition: background 0.2s ease; } .product-faq details[open] { background: #ffffff; } .product-faq summary { font-weight: 600; cursor: pointer; list-style: none; position: relative; padding-right: 28px; } .product-faq summary::after { content: "+"; position: absolute; right: 0; top: 0; font-size: 18px; font-weight: 600; } .product-faq details[open] summary::after { content: "–"; } .product-faq summary::-webkit-details-marker { display: none; } .product-faq .faq-content { margin-top: 12px; color: #555; line-height: 1.65; } Frequently Asked Questions — Co:Spinel What is a Co:Spinel crystal? Co:Spinel (cobalt-doped magnesium aluminate spinel, Co²⁺:MgAl₂O₄) is a solid-state laser material used as a passive Q-switch or saturable absorber for mid-infrared lasers. What wavelength range does Co:Spinel cover? Co:Spinel exhibits a broad absorption band typically from 1200 to 1600 nm, making it suitable for Er:YAG, Tm:YAG, Ho:YAG, and related mid-IR laser systems. What are the main applications of Co:Spinel? Passive Q-switching and pulse generation in solid-state lasers used in medical, industrial, scientific research, defense, and LIDAR platforms. Why use Co:Spinel instead of active Q-switches? Co:Spinel enables passive Q-switching without external electronics, resulting in simpler, more compact, and highly reliable laser designs with excellent damage resistance. What shapes and sizes are available? Co:Spinel crystals are available in custom diameters, thicknesses, rods, slabs, plates, and special geometries tailored to your laser cavity design. Do you provide optical polishing and AR coatings? Yes. Laser-grade optical polishing and anti-reflection (AR) coatings optimized for your operating wavelength are available upon request. Are your Co:Spinel crystals suitable for research and OEM use? Yes. Our Co:Spinel crystals are supplied to universities, R&D laboratories, and industrial laser manufacturers with consistent quality and customizable specifications.
