Nd:YVO4 Crystal for Efficient Diode-Pumped Laser Applications
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China
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On FindLight:
since 2018
Description
The Nd:YVO4 crystal, also known as Neodymium-doped Yttrium Vanadate, is a highly efficient laser crystal specifically designed for diode pumping applications. It stands out among the current commercial laser crystals, particularly for low to medium power lasers, due to its superior absorption and emission characteristics compared to Nd:YAG. The crystal's excellent thermal conductivity, large stimulated emission cross-section, and wide absorption bandwidth make it an ideal choice for compact laser devices. Additionally, the uniaxial nature of Nd:YVO4 allows it to emit linearly polarized light, making it a versatile component in laser technology. When pumped by laser diodes, the Nd:YVO4 crystal can be effectively combined with nonlinear optical (NLO) crystals such as BBO, BiBO, or KTP to shift the frequency of the output from near-infrared to visible wavelengths like red, yellow, and green. This capability to construct all-solid-state lasers makes it a preferred tool for a wide range of laser applications. These applications include machining, material processing, spectroscopy, wafer inspection, light displays, medical diagnostics, laser printing, and data storage. The Nd:YVO4-based diode-pumped solid-state lasers are rapidly gaining market share traditionally held by water-cooled ion lasers and lamp-pumped lasers, especially when compact design and single-longitudinal-mode output are required. The Nd:YVO4 crystal boasts large stimulated emission cross-sections at 1064 nm and 1342 nm, with the cross-section at 1064 nm being approximately four times higher than that of Nd:YAG. Although the fluorescence lifetime of Nd:YVO4 is about 2.7 times shorter than that of Nd:YAG, its high pump quantum efficiency ensures that the slope efficiency can be remarkably high when the laser cavity is properly designed. This makes Nd:YVO4 a powerful and efficient choice for various laser applications, offering a significant advantage in performance and design flexibility.
Nd:YVO4 Crystal for Efficient Diode-Pumped Laser Applications
Specifications |
|
|---|---|
| Type Of Crystal: | Nd:YVO4 |
| AR Coating: | Uncoated, Both sides, One side |
| Host Material Formula: | Nd:YVO4 |
| Crystal Structure: | Tetragonal |
| Lattice Constant: | a=b=7.1193 Å, c=6.2892 Å |
| Thermal Expansion Coefficient: | αa=4.43×10^-6 K^-1, αc=11.37×10^-6 K^-1 |
| Thermal Conductivity: | 0.05 W∙cm^-1∙K^-1 |
| Melting Point: | 1825 ℃ |
| Mohs Hardness: | 4-5 |
| Density: | 4.22 g/cm^3 |
| Birefringence: | Positive uniaxial |
| Lasing Wavelength: | 1064, 1342, 914 nm |
| Pump Wavelength: | 808 nm |
| Absorption Coefficient: | 30.6 cm^-1 (E∥C), 11.4 cm^-1 (E⊥C) |
| Absorption Cross Section: | 2.7x10^-19 cm^-2 (808 nm, c-pol.) |
Features
- Low Lasing Threshold and High Slope Efficiency: Nd:YVO4 crystals offer exceptional efficiency, making them ideal for diode-pumped laser applications.
- Large Stimulated Emission Cross-Section: Features a significantly larger stimulated emission cross-section at lasing wavelengths compared to other laser crystals.
- High Absorption Over a Wide Pumping Wavelength Bandwidth: Ensures efficient absorption and performance across a broad range of wavelengths.
- Uniaxial and Large Birefringence: The Nd:YVO4 crystal emits linearly polarized light, enhancing its utility in various applications.
- Low Dependence on Pumping Wavelength: Easily achieves single-mode output, offering versatility in laser design.
Our Advantages
- In-House Production: Crystal boules growth, cutting, polishing, and coating are all managed in-house for quality control.
- Customizable Doping Concentrations: Offers various doping concentrations from 0.1% to 3% with precise tolerance levels.
- Quick Delivery and Competitive Pricing: Ensures timely delivery and cost-effectiveness in the market.
Applications
- Industrial Laser: Nd:YVO4 crystals are widely used in industrial laser applications due to their efficient diode pumping capabilities and compact design.
- Medical Laser: The high efficiency and compactness of Nd:YVO4 make it ideal for medical laser systems, offering precise and effective solutions.
- Laser Show System: Nd:YVO4 is used in laser show systems due to its ability to emit linearly polarized light and provide vibrant color outputs when combined with NLO crystals.
- End-pumped CW and QCW Lasers: Mainly used for continuous wave (CW) and quasi-continuous wave (QCW) low and medium power solid-state lasers, offering high slope efficiency and low lasing threshold.
Frequently Asked Questions
Nd:YVO4, or Neodymium-doped Yttrium Orthovanadate, is a laser crystal known for its efficiency in diode pumping, particularly in low to medium power lasers.
Nd:YVO4 crystals have a low lasing threshold, high slope efficiency, large stimulated emission cross-section, high absorption over a wide pumping wavelength bandwidth, and produce linearly polarized light.
Nd:YVO4 crystals are used in industrial lasers, medical lasers, laser show systems, and are mainly used for end-pumped continuous wave (CW) and quasi-continuous wave (QCW) low and medium power solid-state lasers.
Nd:YVO4 has a stimulated emission cross-section about four times higher than Nd:YAG at 1064 nm, although its fluorescence lifetime is shorter. It offers high pump quantum efficiency and can achieve high slope efficiency with proper laser cavity design.
Nd:YVO4 crystals have a tetragonal crystal structure, a melting point of 1825°C, a density of 4.22 g/cm³, a Mohs hardness of 4-5, and are positive uniaxial in birefringence.
The lasing wavelengths for Nd:YVO4 are 1064 nm, 1342 nm, and 914 nm, with a pump wavelength of 808 nm.
Nd:YVO4 crystals allow for compact laser designs and are ideal for applications requiring single-longitudinal-mode output, making them suitable for a wide range of laser applications such as machining, material processing, and medical diagnostics.