chanelink logo
CHANELINK
Ελληνικά

Scientists use glass to create femtosecond lasers

370
2023-09-28 17:12:33
Δείτε τη μετάφραση

Image source: Federal Institute of Technology in Lausanne, Switzerland

 

Science and Technology Daily, Beijing, September 27th (Reporter Zhang Jiaxin) Commercial femtosecond lasers are manufactured by placing optical components and their mounting bases on a substrate, which requires strict alignment of optical components. So, is it possible to manufacture femtosecond lasers entirely from glass? According to the latest issue of Optics magazine, scientists at the Federal Institute of Technology in Lausanne, Switzerland have successfully achieved this, with lasers no larger than credit cards and easier to align.

Researchers stated that due to the lower thermal expansion of glass compared to traditional substrates, it is a stable material. Therefore, they chose glass as the substrate and used commercial femtosecond lasers to etch special grooves on the glass to accurately place the basic components of the laser. Even in precision manufacturing at the micron level, the grooves and components themselves are not precise enough to achieve laser quality alignment. In other words, the reflector is not fully aligned, so at this stage, their glass device cannot be used as a laser.

So, researchers further designed etching to position a mirror in a groove with micro mechanical bending, which can locally twist the mirror when irradiated by femtosecond laser. By aligning the mirror in this way, they ultimately created a stable, small-scale femtosecond laser.

Despite its small size, the peak power of the laser is about 1 kilowatt, and the time to emit pulses is less than 200 femtoseconds, which is so short that light cannot pass through human hair.

This method of permanently aligning free space optical components through laser material interaction can be extended to various optical circuits, with extreme alignment resolutions as low as sub nanometer level.

 

Reprinted from：LDWORLD

Σχετικές προτάσεις

  • X photon 3D nanolithography

    Virtual and Physical Prototypes: X-ray laser direct writing 3D nanolithography.Multi-photon polymerization (MPP), also known as 3D nanoprinting, has been investigated using wavelength-tunable femtosecond lasers. At a fixed pulse width of 100 fs, any spectral color in the range of 500nm to 1200nm can be used, which reveals the interaction of more subtle photophysical mechanisms than two-photon phot...

    2023-09-11
    Δείτε τη μετάφραση

  • Research Progress in High Efficiency Supercontinuum Spectra in Specific Wavebands Made by Shanghai Optics and Machinery High Power Laser Unit Technology Laboratory

    Recently, the High Power Laser Unit Technology Laboratory of Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, has made progress in research on high efficiency supercontinuum in specific bands. The relevant research results were published in the Journal of Lightwave Technology under the title of "Strong Anti Stokes and flat supercontinuum in specified band based on non ...

    2023-10-17
    Δείτε τη μετάφραση

  • TRUMPF high-power laser dynamic beam shaping technology creates opportunities for the electric vehicle industry

    It is reported that researchers from TRUMPF in Germany reported research on using dynamic beam shaping of high-power lasers to improve the productivity of hairpin stators, creating opportunities for the electric vehicle industry. Relevant research was published in "PhotonicsViews" under the title "Unlocking opportunities for the EV industry with beam shaping of high-power lasers".The electric vehi...

    2024-07-01
    Δείτε τη μετάφραση

  • New Meltio robot unit provides large-scale line laser DED

    Meltio is an expert in the field of cost-effective linear laser metal deposition additive manufacturing technology (directed energy deposition, DED) and has launched the new Meltio Robot Cell, a turnkey metal additive manufacturing solution equipped with industrial robotic arms and the recently launched slicing software Meltio Space.The new hardware aligns with the vision of this Spanish company t...

    2023-09-22
    Δείτε τη μετάφραση

  • Gooch&Housego successfully acquires Phoenix Optical Technologies

    Recently, renowned precision optical technology manufacturer Gooch&Housego (G&H) announced the successful acquisition of Phoenix Optical Technologies, a precision optical manufacturer located in St. Asaf, Wales, UK. The acquisition transaction amounts to £ 6.75 million, which not only consolidates G&H's market position in the aerospace and defense sectors, but also significantly expa...

    2024-11-04
    Δείτε τη μετάφραση