Robust and adhesive-free joint of Nd:YAG crystals by femtosecond laser-assisted welding

The strong, adhesive-free and heat resistant joint between two Nd:YAG crystals due to nanoperiodic amorphous nanoplanes is demonstrated by using the femtosecond laser-assisted welding (FLAW). The FLAW method has a high potential for use in the manufacture of crystal-based optical elements for high-p...

Full description

Saved in:
Bibliographic Details
Published in:Optics and laser technology 2022-02, Vol.146, p.107594, Article 107594
Main Authors: Lipateva, Tatiana O., Okhrimchuk, Andrey G., Lipatiev, Alexey S., Karateev, Igor A., Fedotov, Sergey S., Lotarev, Sergey V., Shestakov, Alexander V., Sigaev, Vladimir N.
Format: Article
Language:English
Subjects:
Adhesive joints
Adhesive strength
Adhesive-free bonding
Aluminum
Bonding strength
Crystal structure
Electric furnaces
Electron microscopes
Fiber lasers
High resolution electron microscopy
Laser beam heating
Laser beam welding
Laser cooling
Laser welding
Lasers
Microscopy
Nanogratings
Nd:YAG
Raman spectroscopy
Semiconductor lasers
Shear strength
Solid state lasers
Transmission electron microscopy
Ultrashort laser pulses
YAG lasers
Yttrium
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The strong, adhesive-free and heat resistant joint between two Nd:YAG crystals due to nanoperiodic amorphous nanoplanes is demonstrated by using the femtosecond laser-assisted welding (FLAW). The FLAW method has a high potential for use in the manufacture of crystal-based optical elements for high-power solid-state lasers. [Display omitted] •Femtosecond Laser-Assisted Welding technique is firstly developed for Nd:YAG crystals.•The strong bonding with the shear strength up to 110 MPa is achieved.•The bonding is realized through nanoperiodic amorphous regions.•The results have significant potential for solid state laser technology. We demonstrate the laser-assisted yttrium aluminum garnet (YAG) crystal-to-crystal bonding with the shear strength up to 110 MPa. The structure of the fabricated weld is investigated by micro-Raman spectroscopy, scanning electron microscopy and high-resolution transmission electron microscopy. The correlation of Raman peak broadening with the presence of an amorphous phase is reliably established. The formation of the amorphous phase was confirmed by electron microscopy. TEM and HR-TEM have shown that the bonding of crystals is presented by 80–90 nm thick nanoperiodic amorphous nanoplanes interleaved with crystalline regions. The laser-induced weld can withstand a rapid heating to 1000 °C by placing the sample in an electric furnace as well as pumping by an 808 nm CW fiber-coupled laser diode with a power density up to 15 kW/cm2. The obtained results are an essential step to the development of passive cooling technology for high-power solid-state lasers with excellent beam quality.
ISSN:0030-3992
1879-2545
DOI:10.1016/j.optlastec.2021.107594