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AR Coated Yb:CALGO Laser Crystal | Sub-100 fs Ultrafast Laser Applications
AR Coated Yb:CALGO Laser Crystal | Sub-100 fs Ultrafast Laser Applications
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The Yb:CALGO (Ytterbium-doped Calcium Aluminum Gadolinium Oxide) crystal represents the pinnacle of modern gain media for high-power, ultra-short pulse (ultrafast) lasers. Combining an exceptionally broad and flat emission bandwidth with excellent thermal properties, Yb:CALGO bridges the gap between the high power handling of Yb:YAG and the ultra-short pulse capabilities of Ti:Sapphire.
Our Yb:CALGO crystals feature state-of-the-art Anti-Reflection (AR) coatings designed to maximize throughput, minimize parasitic losses, and prevent unwanted back-reflections in high-energy laser cavities.
Key Features & Advantages
- Ultra-Short Pulse Generation: Perfect for generating sub-100 fs (and down to sub-30 fs) pulses directly via passive mode-locking.
- High Thermal Conductivity: Outstanding thermal management (κ ≈ 6.3 W/m⋅K) minimizes thermal lensing effects, even under intense diode pumping.
- Broad & Smooth Emission Bandwidth: Exceptionally flat emission spectrum around 1050 nm, allowing for broad wavelength tuning and extreme pulse compression.
- Premium AR Coating: High-damage-threshold Anti-Reflection coating optimized for both pump (980 nm) and emission (1030-1060 nm) wavelengths to guarantee peak transmission.
- High Absorption Cross-Section: Optimizes pump absorption efficiency, enabling compact and robust laser cavity architectures.
Applications
- Femtosecond & Picosecond Laser Oscillators
- High-Power Ultrafast Laser Amplifiers (CPA Systems)
- Industrial Micro-machining and Laser Material Processing
- Medical Lasers (Ophthalmology & Precision Surgery)
- Nonlinear Optics and Optical Parametric Oscillators (OPOs)
Technical Specifications
| Parameter | Specifications |
|---|---|
| Chemical Formula | Yb³⁺:CaGdAlO₄ |
| Doping Concentration | 1.0% to 5.0% (Customizable upon request) |
| Orientation | a-cut (Standard for maximum gain and polarization control) |
| Coating | AR/AR @ 980 nm + 1030-1060 nm (R < 0.2%) |
| Surface Quality | 10-5 Scratch-Dig (MIL-PRF-13830B) |
| Surface Flatness | <λ/10 @ 632.8 nm |
| Wavefront Distortion | <λ/4 per inch |
| Clear Aperture | > 90% |
| Laser Damage Threshold | > 10 J/cm² @ 1064 nm (10 ns, 10 Hz) |
Customization Options
We understand that every laser system layout is unique. We provide customizable variations for:
- Dimensions: Custom rods, slabs, or thin disks tailored to your mounting and cooling geometry.
- Doping Levels: Fine-tuned ytterbium concentration optimized for your specific pump absorption requirements.
- Coating Profiles: High-Reflectivity (HR), Partial-Reflectivity (PR), or custom dichroic coatings are available upon request.
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