Cr4+:YAG Passive Q-Switch Crystal
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China
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On FindLight:
since 2019
Description
Cr4+: YAG, or Chromium-doped Yttrium Aluminum Garnet, is a highly efficient crystal widely recognized for its exceptional performance in passive Q-switching applications. This remarkable crystal is capable of functioning as a working medium for lasers operating in the 1350~1600nm range and is also utilized in passive Q-switching lasers within the 900~1200nm range. Its versatility makes it a preferred choice for various laser systems, including Nd: YAG, Nd: YLF, Nd: YVO4, and Yb: YAG lasers.
The Cr4+: YAG crystal is typically grown using the Czochralski method, a process that ensures high-quality crystal growth. In recent years, Cr4+: YAG has gained popularity over traditional crystal materials like LiF and Dye due to its outstanding properties. It boasts excellent chemical stability and thermal conductivity, making it a reliable choice for demanding applications. Additionally, the crystal is UV resistant and has a high damage threshold, ensuring longevity and durability. These attributes, combined with its ease of operation, make Cr4+: YAG an ideal material for modern laser technologies.
The unique properties of Cr4+: YAG crystals have positioned them as a leading choice in the laser industry. Their ability to withstand high radiation levels and maintain high thermal conductivity ensures consistent performance even under challenging conditions. The crystal's UV resistance and high damage threshold further enhance its reliability, making it suitable for a wide range of applications. As advancements in laser technology continue, Cr4+: YAG crystals are expected to play a significant role in shaping the future of laser systems.
Cr4+:YAG Passive Q-Switch Crystal
Specifications |
|
|---|---|
| Type Of Crystal: | Cr:YAG |
| Crystal Diameter: | 3 mm |
| Crystal Length: | 1.3 mm |
| AR Coating: | One side |
| Coatings: | AR≤ 0.2% @1064nm |
| Chemical Formula: | Cr4+:Y3Al5O12 |
| Thermal Expansion /(10-6/°C@25°C): | 7.8 <111> | 7.7 <110> | 8.2 <100> |
| Emission Wavelength: | 1350 nm ~ 1600 nm |
| Transmission: | 10% to 90% |
| Charge Compensating Ion: | Ca2+, Mg2+ |
| Refractive Index @1064 Nm: | 1.83 |
| Poisson Ratio: | 0.25 |
| Extinction Ratio: | 25 dB |
| Thermal Shock Resistance Parameter: | 800 W/m |
| Specific Heat/ (J·g-1·K-1): | 0.59 |
| Thermal Conductivity: | 0.1213 |
| Melting Point: | 1970 °C |
| Tensile Strength: | 2 GPa |
| Young's Modulus: | 335 GPa |
| Mohs Hardness: | 8.5 |
| Mass Density: | 4.56 g/cm^3 |
| Orientation: | [100] or [110] < ±0.5° |
| Lattice Parameters, Å: | 12.01 |
| Crystal Structure: | cubic - la3d |
Features
- Wide Laser Compatibility: Suitable for 1350~1600nm lasers and 900~1200nm passive Q-switching lasers, including Nd:YAG, Nd:YLF, Nd:YVO4, and Yb:YAG lasers.
- Excellent Growth Method: Typically grown by the Czochralski method, ensuring high-quality crystals.
- Superior Material Properties: High chemical stability, thermal conductivity, UV resistance, and high damage threshold.
- Higher Reliability & Longer Lifetime: Offers increased durability and consistent performance over time.
- Radiation Stability: Maintains performance under various radiation conditions.
- Optical Properties: High extinction ratio of 25dB and a refractive index of 1.83 @1064 nm.
- Thermal Properties: Thermal conductivity of 0.1213 and a melting point of 1970°C.
- Mechanical Robustness: Mohs hardness of 8.5 and a tensile strength of 2 GPa.
- Versatile Applications: Ideal for Q-switching and model-locking in Nd:YAG, Nd:YAP, Nd:KGW, and Nd:YVO4 lasers, as well as pumping erbium-doped lasers and amplifiers.
- Customizable Specifications: Available in various dimensions and coatings, with surface quality of 10/5 and flatness <λ/8@632 nm.
- High Damage Threshold: Withstands > 500 MW/cm², making it suitable for high-power applications.
Applications
- Passive Q-Switching for Nd:YAG Lasers: Enables pulsed operation at 1064 nm and related wavelengths.
- Passive Q-Switching for Nd:YLF and Nd:YVO4 Lasers: Supports efficient pulse generation in various solid-state lasers.
- Pumping Erbium-Doped Lasers and Amplifiers: Used as a Q-switch in lasers emitting around 1550 nm.
- Near-Infrared Laser Systems: Suitable for lasers operating in the 1350–1600 nm wavelength range.
Frequently Asked Questions
Cr4+: YAG is typically grown by the Czochralski method.
Cr4+: YAG can be used for Q-switching and model-locking in Nd:YAG, Nd:YLF, Nd:YVO4, and Yb:YAG lasers. It can also be used for pumping erbium-doped lasers and amplifiers.
Cr4+: YAG has higher reliability and longer lifetime, radiation stability, high thermal conductivity, UV resistance, and high damage threshold.
Cr4+: YAG has an emission wavelength of 1350 nm to 1600 nm, absorption coefficient of 1.0 cm-1 to 7 cm-1, and ground state absorption cross section of 4.3x10-18 cm2. Its transmission ranges from 10% to 90%, and it has an AR coating of ≤0.2% at 1064nm.
Cr4+: YAG (Cr4+: Y3Al5O12) is a crystal used for passive Q-switching in lasers.