Polishing Nd YAG Rod 2mm - 12mm In Diameter 1 - 180mm In Length
Nd:YAG Rod
Capabilities:
- Rod size: 2 - 12mm in diameter and 1 - 180mm in length;
- Nd dopant concentration : 0.6% - 1.3%;
- Polishing;
- AR-coating or/and dichroic coating;
Nd:YAG Crystal
During the last decade, Nd:YVO4 has been developed as a promising substitutes for Nd:YAG in diode-pumped lasers due to its high absorption and emission cross-sections. However, the applications of Nd:YVO4 are limited due to its poor physical-mechanical properties and growth difficulty etc. Now, we have developed the high-doped Nd:YAG (SUPER-Nd:YAG) recently. It shows high absorption cross-section and have many advantages over Nd:YVO4:
- Due to the cubic symmetry and high quality, Nd:YAG is easy to operate with TEMoomode
- Nd:YAG can be Q-switched with Cr4+:YAG directly
- Nd:YAG can produce blue laser with the frequency-doubling of 946nm
- Nd:YAG can be operated in a very high power laser up to kW level
The high neodymium-ion doped YAG has been grown by the novel technique-Temperature Gradient Technique (TGT). The Nd concentration can be doped up to 3%. As large asf100x80mm bulk crystals with excellent optical homogeneity, less scattering particles, low dislocation density have been obtained.
Basic Properties:
| Chemical Formula | Y3Al5O12 |
|---|---|
| Crystal structure | Cubic |
| Lattice constant | 12.01Angstrom |
| Melting point | 1970°C |
| Density | 4.5g/cm3 |
| Reflective Index | 1.82 |
| Thermal Expansion Coefficient | 7.8x10-6/K |
| Thermal Conductivity (W/m/K) | 14W/m/K, 20° C 10.5W/m/K, 100° C |
| Mohs hardness | 8.5 |
| Stimulated Emission Cross Section | 2.8x10-19cm-2 |
| Relaxation Time of Terminal Lasing Level | 30 ns |
| Radiative Lifetime | 550ms |
| Spontaneous Fluorescence | 230ms |
| Linewidth | 0.6 nm |
| Loss Coefficient | 0.003 cm-1@ 1064nm |
Laser Properties:
·SUPER-Nd:YAG shows high absorption coefficients at pumping wavelengths. Therefore, a crystal short-in length (e.g.1mm) is preferred and compact microchip lasers can be constructed by using SUPER-Nd:YAG.
- Due to the broader and smoothly-varied bandwidth of absorption, it allows of less stringent requirements of temperature control.
- Almost same output have been achieved both in a (111)-cut 1mm long Nd:YAG and an a-cut 1mm long YVO4 microchip lasers with a very short (9mm) laser cavity.
Spectra Properties with Concentration:
| Nd:Dopant | 2.5% | 2% | 1.5% | 1.3% | 1.1% | 1% |
|---|---|---|---|---|---|---|
| Fluorescence lifetime | 160ms | 180ms | 200ms | 210ms | 220ms | 240ms |
| Absorption coefficient | 7.55cm-1 | 6.57 cm-1 | 5.36 cm-1 | 4.66 cm-1 | 3.88 cm-1 | 3.55 cm-1 |
| Optical Quality/Grades/Nd Level | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Rod Size | Standard Grade | Premium Grade | Standard [Nd]: 1.1 Atom% | Low [Nd]: 0.8 Atom% | |||||
| L | D | Extinct. Ratio | Wave Error | Extinct. Ratio | Wave Error | Tolerance of [Nd] Over Rod Length | Tolerance of [Nd] Over Rod Length | ||
| mm | mm | (dB) | (waves) | (dB) | (waves) | Average [Nd] | delta [Nd] | Average [Nd] | delta [Nd] |
| 50 | 3 | >25 | <0.19 | >30 | <0.13 | ±.08 | 0.06 | ±.07 | 0.05 |
| 50 | 4 | <0.21 | <0.15 | ||||||
| 50 | 5 | <0.24 | <0.16 | ||||||
| 100 | 4 | >22 | <0.28 | >27 | <0.18 | ±.08 | 0.13 | ±.06 | 0.09 |
| 100 | 5 | <0.32 | <0.21 | ||||||
| 100 | 6 | <0.36 | <0.23 | ||||||
| 100 | 6.35 | <0.37 | <0.24 | ||||||
| 150 | 6.35 | >20 | <0.48 | >25 | <0.30 | ±.05 | 0.18 | ±.04 | 0.13 |
| 150 | 8 | <0.58 | <0.35 | ||||||
| 150 | 9.52 | <0.67 | <0.40 | ||||||
| 200 | 8 | >19 | <0.71 | >24 | <0.42 | ±.02 | 0.23 | ±.02 | 0.17 |
| 200 | 9.53 | <0.82 | <0.49 | ||||||
| 200 | 10 | <0.86 | <0.51 | ||||||
Coatings |
|||||||||
| Type | Reflectivity | Damage Threshold | Damage Threshold | ||||||
| (%R per Surface) | (<20nS Pulse, GW/cm^2) | (CW, kW/cm^2) | |||||||
| AR @1064nm | <0.15 | >1.4 | >25 | ||||||
| HR @1064nm | >99.9 | >1.0 | >25 | ||||||
Typical Dimensions:
- Diameter3, length 50mm
- Diameter 3, length 63mm
- Diameter 3, length 110mm
- Diameter 4, length 50mm
- Diameter 4, length 80mm
- Diameter 4, length 110mm
- Diameter 4, length 120mm
- Diameter 4, length 130mm
- Diameter 4, length 140mm
- Diameter 5, length 110mm
- Diameter 5, length 115mm
- Diameter 5, length 130mm
- Diameter 6, length 110mm
- Diameter 6, length 120mm
- Diameter 6, length 130mm
- Diameter 6, length 150mm
- Diameter 6, length 165mm
- Diameter 7, length 120mm
- Diameter 7, length 165mm
- Diameter 8, length 120mm
- Diameter8, length 150mm
- Diameter 10, length 150mm
Besides the above dimensions, we also have other dimensions or custom-make according to your specific requirement.
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