Specifications:
| Damage | ≤ 3.0 × 10-3 cm-1 | Flatness | < λ/10 |
| Parallelism | ≤ 10" | Perpendicularity | ≤ 5’ |
| Surface Quality | 10/5 S/D (MIL-O-13830A) | Optical Quality | Interference fringes ≤ 0.125/inch |
| Size | Diameter: 2～18 mm, Length 3～200 mm |
Dimensional Tolerances | Diameter:+0.000/-0.05mm, Length ± 0.5mm Chamfer:<0.1 mm @ 45º |
| Coating | Upon request of customer | ||
The diffusion bonding crystals stated in the following chart are available in Shanghai North Optics:
| Bonding Crystal Combinations | Doping Concentration(atm) or Optical Density (cm-1) | Aperture (mm) | Length (mm) |
| YAG+Nd :YAG | Nd:0.6~1.2% | 2×2~20×20 | 2~200 |
| YAG+Cr4+ :YAG | 0.6~7 | 2×2~20×20 | 2~50 |
| Nd :YAG + Cr4+:YAG | Nd:0.6~1.2% / 0.6~7 | 2×2~20×20 | 2~200 |
| YAG+Nd :YAG+YAG | Nd:0.6~1.2% | 2×2~20×20 | 3~200 |
| YAG+Nd:YAG+Cr4+:YAG | Nd:0.6~1.2% / 0.6~7 | 2×2~20×20 | 3~200 |
| YAG+Nd:YAG+Cr4+:YAG+YAG | Nd:0.6~1.2% / 0.6~7 | 2×2~20×20 | 5~200 |
| Cr:YAG+Nd:Ce:YAG | 0.6-7/Nd:0.9~1.3% Ce:Nd=1:10 | 2x2~10x10 | 5~130 |
| YAG+Cr4+:YAG+Nd:Ce:YAG+YAG | 0.6~7/Nd:0.9~1.3%, Ce:Nd=1:10 | 2×2~10×10 | 5~130 |
| YAG+Cr4+:YAG+Nd:Ce:YAG+YAG |
Nd:0.1~3% | 2x2~10x10 | 1~20 |
| YVO4+Nd:YVO4+YVO4 | Nd:0.1~3% | Dia2~10 | 3~20 |
Some diffusion bonding rod examples as references:
| Diffusion Crystals Modules | Diffusion Bonding Types | Descriptions |
| SHYAG-B-D6.35x105-T20 | Nd:YAG+Cr:YAG | Nd:YAG D6.35x105mm; HR1064nm Cr:YAG T0=20%; PR=40% |
| SHYAG-B-D3x50-T40 | Nd:Ce:YAG+Cr:YAG | Nd:YAG D3x50mm; HR1064nm Cr:YAG T0=40%; PR=40% |
| SHYAG-B-D3x10-T40 | Nd:YAG+Cr:YAG | Nd:YAG D3x7.5mm; HR1064nm Cr:YAG T0=40%; PR=40% |
| SHYAG-B-D3x10-T45 | YAG+Nd:YAG+Cr:YAG | YAG D3x0.7mm; HR1064nm; Nd:YAG D3x7.3mm; Cr:YAG T0=45; PR=45% |
Diffusion Bonding Crystals are composite laser crystals consisting of two, three, or more parts crystals with different doping characteristics, where the constituent parts are combined through a technique called diffusion bonding, that is, the diffusion of atoms across their interface. During the bonding process, the interfaces of the crystals are polished until ultra-high flatness is obtained, and the process does not involve the usage of adhesives. There are various approaches to bonding the crystals, including composite crystals with different dopants, undoped end caps on a short laser rod, crystal plates with different doping concentrations, etc. The composite design of the crystals has unique advantages, for example, undoped end caps on a short laser rod can increase thermal endurance and reduce the strength of the thermal lens effect. Compared with normal laser crystals, diffusion bonding laser crystals are conducive to the enhancement of power scalability, power efficiency, beam quality of lasers, and the improvement of mechanical and thermal properties. Furthermore, this diffusion bonding technique can not only upgrade the overall laser performance to a significant extent but is also beneficial to the simplification of laser modules, granting access to compact designs.
Shanghai North Optics provides a copious selection of diffusion bonding crystals, including YAG+Nd :YAG, YAG+Cr4+ :YAG, Nd :YAG + Cr4+:YAG, YAG+Nd :YAG+YAG, YAG+Nd:YAG+Cr4+:YAG, YAG+Nd:YAG+Cr4+:YAG+YAG, Cr:YAG+Nd:Ce:YAG, YAG+Cr4+:YAG+Nd:Ce:YAG+YAG, YVO4+Nd:YVO4+YVO4, which you can check in detail in the Modules or Types sector. Various dimensions, doping percentages, and coatings could be tailored upon requests.
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