chanelink logo
CHANELINK
Русский

Scientists use glass to create femtosecond lasers

495
2023-09-28 17:12:33
Посмотреть перевод

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

Связанные рекомендации

  • Fabrinet Laser Business Revenue Surges

    Recently, Fabrinet released its financial report for the three months ended December 27, 2024, showing that its sales and revenue exceeded expectations. During the reporting period, the company achieved sales of $834 million, a year-on-year increase of 17%. Net income increased by 25% during the same period, reaching $86.6 million.Although the growth in performance is still dominated by the optica...

    02-07
    Посмотреть перевод

  • In depth understanding of the formation of condensation rings in laser spot welding - machine learning and molecular dynamics simulation

    Researchers from the Pacific Northwest National Laboratory and Johns Hopkins University have reported that machine learning and molecular dynamics simulations can help to gain a deeper understanding of the formation of condensation rings in laser spot welding. The related paper titled 'Machine learning and molecular dynamics simulations aided insights into conditioned ring formation in laser spot ...

    2024-12-21
    Посмотреть перевод

  • Analysis of Development Prospects and Technological Trends in the Optical Industry

    As a core supporting field of modern technology, the optical industry has broad and diversified development prospects, benefiting from the cross drive of multiple emerging technologies. The following is a systematic analysis from the perspectives of technology trends, application areas, challenges, and opportunities: Core driving forces and growth areas1. Optical communication and 5G/6GDemand ex...

    04-30
    Посмотреть перевод

  • Composite two-dimensional materials for fiber lasers demonstrate the prospects of ultra fast optical applications

    The formation of dissipative solitons is influenced by various factors, such as spectral filtering effect and Kerr nonlinearity effect. This interaction leads to the possibility of mode locking on a large range of parameters, generating pulses with completely different types and evolution from conventional physical laws and optical properties, tolerating higher nonlinear effects, and effectively a...

    2023-09-21
    Посмотреть перевод

  • Dr. Mark Sobey, President of Coherent Lasers, has officially retired

    On September 1 local time, Coherent, an American laser system solutions provider, announced that Dr. Mark Sobey, president of its laser division, has officially retired from the company.In July 2022, II-VI and Coherent completed the merger and were reorganized into three business units: Lasers, Materials and Networking. Since this point, Dr. Sobey has served as President of Coherent's Laser divisi...

    2023-09-05
    Посмотреть перевод