chanelink logo
CHANELINK
Русский

Scientists build high-power cladding-pumped Raman fiber laser in 1.2 μm band

896
2024-01-31 13:58:14
Посмотреть перевод

Laser sources operating in the 1.2 μm band have some unique applications in photodynamic therapy, biomedical diagnostics, and oxygen sensing. In addition, they can be used as pump sources for mid-infrared optical parameter generation and visible light generation through frequency doubling.

Laser generation in the 1.2 μm band has been achieved by different solid-state lasers, including semiconductor lasers, diamond Raman lasers, and fiber lasers. Among these three types, fiber lasers are an excellent choice for generating 1.2 μm band lasers due to their simple structure, good beam quality, and flexible operation.

Researchers led by Professor Pu Zhou from the National University of Defense Technology in China are interested in high-power fiber lasers in the 1.2μm band. Most of the current high-power fiber lasers are ytterbium-doped fiber lasers in the 1 μm band, and the maximum output of the 1.2 μm band is limited to 10 watts.

Their research, titled "High-Power Tunable Raman Fiber Laser in the 1.2 μm Band," was published in Frontiers in Optoelectronics.

Their idea is to use the stimulated Raman scattering effect in passive optical fibers to obtain high-power laser generation in the 1.2μm band. The stimulated Raman scattering effect is a third-order nonlinear effect that converts photons to longer wavelengths.

By exploiting the stimulated Raman scattering effect in phosphorus-doped optical fiber, the researchers converted the high-power ytterbium-doped fiber in the 1 μm band to the 1.2 μm band. A Raman signal with a power of 735.8 W was obtained at 1252.7 nm, which is the highest output power ever reported for a 1.2 μm band fiber laser.

Source: Laser Network


Связанные рекомендации

  • The latest progress in laser chip manufacturing

    Modern computer chips can construct nanoscale structures. So far, only these tiny structures can be formed on top of silicon chips, but now a new technology can create nanoscale structures in a layer beneath the surface. The inventor of this method stated that it has broad application prospects in the fields of photonics and electronics, and one day, people can manufacture 3D structures on the ent...

    2024-07-29
    Посмотреть перевод

  • Jenoptik invests 100 million euros to open new factory

    On May 30th, Jenoptik announced on its official WeChat account that after approximately two and a half years of construction, its new factory in Dresden, Germany, with an investment of nearly 100 million euros, has officially opened. This is the largest single investment project in Jenoptik's recent history.Jenoptik President and CEO Dr. Stefan Traeger stated that this new factory will make Dresde...

    06-05
    Посмотреть перевод

  • Observation of nanoscale behavior of light driven polymers using combination microscopy technology

    Expanding our scientific understanding often boils down to observing what is happening as closely as possible. Now, researchers from Japan have observed the nanoscale behavior of azo polymer films and triggered them with lasers.In a study published in Nano Express last month, researchers at Osaka University used a combination of cutting-edge scanning high-speed atomic force microscopy and optical ...

    2024-03-12
    Посмотреть перевод

  • Scientists use glass to create femtosecond lasers

    Image source: Federal Institute of Technology in Lausanne, SwitzerlandScience 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 glas...

    2023-09-28
    Посмотреть перевод

  • Artificial intelligence accelerates the process design of 3D printing of metal alloys

    In order to successfully 3D print metal parts to meet the strict specifications required by many industries, it is necessary to optimize process parameters, including printing speed, laser power, and layer thickness of deposited materials.However, in order to develop additive manufacturing process diagrams that ensure these optimal results, researchers have to rely on traditional methods, such as ...

    2024-02-27
    Посмотреть перевод