Crystal Bonding– Composite Technology Of Laser Crystals

Short Description:

Crystal bonding is a composite technology of laser crystals. Since most optical crystals have a high melting point, high temperature heat treatment is usually required to promote the mutual diffusion and fusion of molecules on the surface of two crystals that have undergone precise optical processing, and finally form a more stable chemical bond. , to achieve a real combination, so the crystal bonding technology is also called diffusion bonding technology (or thermal bonding technology).

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Product Description

The significance of the application of bonding technology on laser crystals lies in: 1.Miniaturization and integration of laser devices/systems, such as Nd:YAG/Cr:YAG bonding for the production of passive Q-switched microchip lasers; 2. Improving the thermal stability of laser rods Performance, such as YAG/Nd:YAG/YAG (that is, bonded with pure YAG to form the so-called "end cap" at both ends of the laser rod) can significantly reduce the temperature rise of the end face of the Nd:YAG rod when it is working, mainly used for semiconductor pumping Solid-state lasers and solid-state lasers that require high power operation.
Our company's current main YAG series bonded crystal products include: Nd:YAG and Cr4+:YAG bonded rods, Nd:YAG bonded with pure YAG at both ends, Yb:YAG and Cr4+:YAG bonded rods, etc.; diameters from Φ3 ~15mm, length (thickness) from 0.5~120mm, can also be processed into square strips or square sheets.
Bonded crystal is a product that combines a laser crystal with one or two pure non-doped homogeneous substrate materials through bonding technology to achieve a stable combination. Experiments show that bonding crystals can effectively reduce the temperature of laser crystals and reduce the influence of thermal lens effect caused by end face deformation.


● Reduced thermal lensing caused by end face deformation
● Improved light-to-light conversion efficiency
● Increased resistance to photodamage threshold
● Improved laser output beam quality
● Reduced size

Flatness <λ/10@632.8nm
Surface quality 10/5
Parallelism <10 arc seconds
Verticality <5 arc minutes
Chamfer 0.1mm@45°
Coating layer AR or HR coating
Optical quality  Interference fringes: ≤ 0.125/inch Interference fringes: ≤ 0.125/inch

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