Ελληνικά

Beyond Limits: The Amazing Power of Water in Laser Development

935
2024-02-26 14:20:25
Δείτε τη μετάφραση

Water helps to generate ultra continuous white lasers with an extremely wide wavelength range.
Researchers have made significant progress in creating ultra wideband white laser sources, which have a wide wavelength range from ultraviolet to far-infrared. These advanced lasers are used in various fields, including imaging, femtosecond chemistry, telecommunications, laser spectroscopy, sensing, and ultrafast science.


Intense white laser projects a brilliant rainbow
However, this pursuit faces challenges, especially in selecting suitable nonlinear media. Although traditional solid materials are efficient, they are susceptible to optical damage under peak power conditions. Although gas media have resistance to damage, they are usually inefficient and technically complex.

Innovative solutions using water as a nonlinear medium
Researchers from South China University of Technology have recently taken non-traditional measures to treat water as a nonlinear medium. Water is abundant and inexpensive, and can be protected from optical damage even under the influence of high-power lasers. As reported in the Journal of Advanced Photonics in the Golden Open Access journal, water induced spectral broadening involves enhanced self phase modulation and stimulated Raman scattering, resulting in a supercontinuum white laser with a bandwidth of 435nm and 10dB, covering an impressive range of 478-913nm.

Progress in Cooperation between Water and CPPLN
To further innovate, researchers combined water with chirped periodically polarized lithium niobate (CPPLN) crystals, which are known for their powerful second-order nonlinear power. This cooperative relationship not only expands the frequency range of supercontinuum white laser, but also flattens its output spectrum. According to Professor Zhi Yuan Li, the senior author of the study, "The cascaded water CPPLN module provides a long lifespan, high stability, and low cost technical route for achieving 'three high' white lasers with strong pulse energy, high spectral flatness, and ultra wide bandwidth."

The results of the water CPPLN cooperation are expected. The pulse energy of this ultra wideband ultra continuous spectrum light source is 0.6 mJ, with a 10 dB bandwidth spanning one octave (413-907nm), and it has potential in ultrafast spectroscopy and hyperspectral imaging. Zhi Yuan Li observed, "It provides high resolution of physical, chemical, and biological processes at extreme spectral bandwidths with high signal-to-noise ratio. It opens up an efficient pathway to create long-lived, highly stable, and cost-effective white light lasers with strong pulse energy, high spectral flatness, and ultra wideband, paving the way for new possibilities in scientific research and application."

Source: Sohu

Σχετικές προτάσεις
  • The wide application of TORNOS mind machine in diversified industrial fields

    TORNOS walking machine, also known as walking CNC lathe or spindle box mobile CNC automatic lathe, occupies an important position in the field of precision manufacturing due to its excellent performance and wide application areas. This machine tool not only integrates mechanical and electrical technologies, but also becomes an indispensable processing equipment in many industrial fields due to its...

    2024-07-24
    Δείτε τη μετάφραση
  • Laser beam combined with metal foam to produce the brightest X-ray

    According to the Physicists' Network, scientists from Lawrence Livermore National Laboratory (LLNL) in the United States ingeniously combined the high-power laser emitted by the National Ignition Facility (NIF) with the ultra light metal foam to create the brightest X-ray ever. These ultra bright high-energy X-rays play an important role in many research fields, including imaging of extremely dens...

    01-18
    Δείτε τη μετάφραση
  • Researchers have created the first organic semiconductor laser to operate without the need for a separate light source

    OLED is located at the top and is formed by an organic layer between the contacts. Apply voltage to it, inject charge and generate light, which in turn excites organic laser. Organic lasers contain a grating that can generate feedback and diffract some of the laser out of the structure.Organic laserResearchers have created the first organic semiconductor laser to operate without the need for a sep...

    2023-11-29
    Δείτε τη μετάφραση
  • Breakthrough in optical quantum simulation using long-lived polariton droplets

    Abstract: A groundbreaking discovery by CNR Nanotec and scientists from the University of Warsaw has revealed a robust method for creating long-lived quantum fluids using semiconductor photonic gratings. This study, published in the journal Nature Physics, marks a significant step forward in simulating complex systems through unique polariton droplets that demonstrate stability in lifespan and rec...

    2024-03-27
    Δείτε τη μετάφραση
  • Shanghai Institute of Optics and Fine Mechanics has achieved beam splitting vortex control and interference detection for the first time in the 46.9nm wavelength band

    Recently, Associate Researcher Zhang Junyong from the High Power Laser Physics Joint Laboratory of the Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, together with Professor Zhao Yongpeng's research group from Harbin Institute of Technology and Professor Zhan Qiwen's research group from Shanghai University of Technology, completed the experimental verification of 46....

    2024-10-17
    Δείτε τη μετάφραση