Nd:YAG Crystal by CRYSTECH for Medical and Industrial Applications
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China
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On FindLight:
since 2018
Description
The Nd:YAG crystal, also known as Neodymium-doped Yttrium Aluminum Garnet, is a highly efficient laser gain medium. This crystal is renowned for its exceptional laser gain even at moderate excitation levels and pump intensities, making it a popular choice in various laser applications. The Nd:YAG allows for high gain efficiency and low threshold pump power, making it a versatile and cost-effective solution for laser systems. One of the key attributes of the Nd:YAG crystal is its ability to be pumped by both diode and lamp sources, with flashlamp pumping being feasible due to its broadband pump absorption in the 800 nm region. This characteristic, combined with its four-level gain medium properties (except for the 946 nm transition), contributes to its widespread use. The most common emission wavelength for Nd:YAG lasers is 1064 nm, but other wavelengths such as 532 nm, 355 nm, and 266 nm can be achieved through frequency doubling, tripling, and quadrupling, respectively. Additionally, it offers emission lines at 946 nm, 1123 nm, 1319 nm, 1338 nm, 1415 nm, and 1444 nm. Nd:YAG crystals are typically produced in monocrystalline form using the Czochralski growth method, ensuring high quality and availability in large sizes. With typical neodymium doping concentrations around 1 at.%, these crystals can be tailored to specific needs by adjusting the doping levels. However, care must be taken to avoid excessive concentrations, which can lead to quenching of the upper-state lifetime and increased power density in high-power lasers. The robustness and versatility of Nd:YAG crystals make them ideal for a wide range of applications in fields such as medicine, defense, machinery, and scientific research.
Nd:YAG Crystal by CRYSTECH for Medical and Industrial Applications
Specifications |
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|---|---|
| Type Of Crystal: | Nd:YAG |
| Crystal Diameter: | 3 mm |
| Crystal Length: | 1 mm |
| AR Coating: | One side, Both sides, Uncoated |
| Host Material Formula: | Y3Al5O12 |
| Crystal Structure: | Cubic |
| Lattice Constant: | a=12.01 Å |
| Thermal Expansion Coefficient: | 7x10^-6 K^-1 |
| Thermal Conductivity: | 0.14 W∙cm^-1∙K^-1 |
| Melting Point: | 1950 ℃ |
| Mohs Hardness: | 8.5 |
| Density: | 4.55 g/cm^3 |
| Emission Cross Section: | 2.8x10^-19 cm^-2 (1064nm) |
| Fluorescence Lifetime: | 230 μs (1064nm) |
| Dn/dT: | 7.3x10^-6 ℃^-1 |
| Refractive Index: | 1.82 (1064nm) |
| Primary Lasing Wavelength: | 1064 nm |
| Dimension Tolerance: | Diameter(+0/-0.05)*Length(+1/-0.5) mm |
| Cut Angle: | <111> |
| Dopant Concentration: | 0.5at%-1.1at% |
| Angle Tolerance: | +/-5° |
| Perpendicularity: | ≤5′ |
| Scratch/Dig: | 10/5 |
| Chamfer: | <0.1mmx45° |
| Parallelism: | ≤10″ |
| Chips: | <0.1mm |
| Flatness: | λ/10@633nm |
| Clear Aperture: | ≥95% |
| Wavefront Distortion: | λ/6@633nm |
| Extinction Ratio: | >28dB |
| Standard Coating: | AR/AR1064nm |
| Damage Threshold: | 1GW/cm² 10ns 10Hz at 1064nm |
| Ends Type: | Parallel, Anti-Parallel, Brewster cut, Flat or Curved |
Features
- High Gain Efficiency: Nd:YAG is a four-level gain medium (except for the 946 nm transition), offering substantial laser gain even for moderate excitation levels and pump intensities.
- Versatile Pumping Options: Can be diode-pumped or lamp-pumped, with flashlamp pumping possible due to broadband pump absorption mainly in the 800 nm region.
- Multiple Emission Wavelengths: Most common emission at 1064 nm, with additional wavelengths at 532 nm, 355 nm, 266 nm, 946 nm, 1123 nm, 1319 nm, 1338 nm, 1415 nm, and 1444 nm through frequency doubling, tripling, and quadrupling.
- High Doping Concentrations: Typical neodymium doping concentrations are around 1 at.%, beneficial for reducing pump absorption length, though too high concentrations can lead to quenching.
- High-Quality Monocrystalline Form: Fabricated with the Czochralski growth method, available in large sizes.
- Wide Range of Applications: Used in medicine, defense, machinery, scientific research, and more.
- Customizable Specifications: Rods available in diameters from 3 mm to 10 mm and lengths up to 150 mm, with various end types including Parallel, Anti-Parallel, and Brewster cut.
- High Damage Threshold Coating: Standard AR/AR1064 nm coating with a damage threshold of 1 GW/cm² 10 ns 10 Hz at 1064 nm.
- Excellent Quality and Competitive Pricing: In-house growth, cutting, polishing, and coating ensure top quality and competitive prices.
- Fast Delivery and Good Service: Committed to providing excellent customer service and quick delivery times.
Applications
- Diode-pumped Laser, Lamp-pumped Laser, Q-switched Laser
- Pulsed or CW operations
- Materials Processing, Marking, Welding, Cutting
- Medical Laser Systems (Dermatology)
- Laser Range Finding
Frequently Asked Questions
Nd:YAG stands for Neodymium-doped Yttrium Aluminum Garnet, a crystal used as a lasing medium in various types of lasers.
Nd:YAG crystals are used in diode-pumped lasers, lamp-pumped lasers, Q-switched lasers, and in applications such as materials processing, medical laser systems, and laser range finding.
The most common emission wavelength of Nd:YAG lasers is 1064 nm.
Crystech offers advantages such as in-house crystal growth, cutting, polishing, and coating, high damage threshold coatings, excellent quality, competitive pricing, fast delivery, and good service.
The typical neodymium doping concentration in Nd:YAG crystals is around 1 atomic percent.
Nd:YAG crystals have a cubic crystal structure, a lattice constant of 12.01 Å, a thermal expansion coefficient of 7x10^-6 K^-1, a thermal conductivity of 0.14 W∙cm^-1∙K^-1, a melting point of 1950°C, a Mohs hardness of 8.5, and a density of 4.55 g/cm³.
Yes, Nd:YAG lasers can be used for both pulsed and continuous wave (CW) operations.