English

Beyond Limits: The Amazing Power of Water in Laser Development

1288
2024-02-26 14:20:25
See translation

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

Related Recommendations
  • Van's updates the manufacturer of laser-cut parts

    Van's Aircraft has responded to reports of ruptured dented parts found in AirVenture's latest kit. These defects are caused by external suppliers changing the process of laser cutting parts. From February 2022 to June 2023, Van's moved some parts from traditional punch manufacturing to an outside supplier that can laser cut rivet holes. The move is designed to increase the company's throughput and...

    2023-08-04
    See translation
  • SPIE Optics and Photonics 2025: Kyle Myers from Puente elected as SPIE Chair

    The founder and principal of Puente Solutions Kyle J. Myers has been elected to serve as the 2026 Vice President of SPIE, the international society for optics and photonics. With her election, Myers joins the SPIE presidential chain. She will serve as president-elect in 2027, and as the Society’s president in 2028. Newly-elected: Myers, McNally, Rubinsztein-Dunlop, Wade, Medicus, and ErdmannTh...

    08-08
    See translation
  • Nature Photonics reports a new type of nonlinear optical crystal - all band phase matched crystal

    Short wave ultraviolet all solid-state coherent light sources have the characteristics of strong photon energy, practicality and precision, and high spectral resolution. They have significant application value in laser precision processing, information communication, cutting-edge science, and aerospace fields.The core component of obtaining all solid-state shortwave ultraviolet lasers is nonlinear...

    2023-10-07
    See translation
  • Scientists Developing New Low Cost Manufacturing Technologies for High Resolution Optical Components

    Scientists from Leibniz University in Hanover have pioneered the development of a new manufacturing technology - UV LED based microscopy projection lithography. This technology is expected to completely change the manufacturing method of optical components, providing high resolution at lower cost and ease of use. The MPP system utilizes the power of UV LED light sources to transcribe the structura...

    2024-01-06
    See translation
  • Data from the 2023/2024 fiscal year of Tongkuai Group shows a decline in sales and order volume

    German high-tech company TRUMPF has released data for the 2023/24 fiscal year: sales decreased by 3.6% to 5.2 billion euros, and orders decreased by 10.4% to 4.6 billion euros. The global number of employees has increased by 650, with a total of over 19000 employees, and the number of employees in Germany has increased by nearly 400.As of June 30, 2024, at the end of the 2023/24 fiscal year, the s...

    2024-10-21
    See translation