chanelink logo
CHANELINK
Português

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

81
2024-01-31 13:58:14
Ver tradução

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


Recomendações relacionadas

  • Received NASA contract! Breakthrough blue light laser technology leads the space power revolution

    On May 6th, NUBURU, a leading enterprise in high-power and high brightness industrial blue laser technology, announced that the company has been awarded a second phase contract worth $850000 by the National Aeronautics and Space Administration (NASA) to promote blue laser power transmission technology as a unique solution that significantly reduces the size and weight of equipment required for lun...

    2024-05-08
    Ver tradução

  • Panacol showcases a new optical grade adhesive on Photonics West

    Panacol will showcase new optical grade resins and adhesives for embossing and optical bonding applications at the SPIE Photonics West exhibition held in San Francisco, California, USA from January 30 to February 1, 2024.These new adhesives can be used for sensors in lightweight carpets, smart devices, and wearable devices in the automotive industry, or for generating structured light in projector...

    2023-12-12
    Ver tradução

  • Two photon absorption quantum mechanism breaks through the resolution and efficiency limits of optical nanoprinting

    Recently, a research team from the School of Physics and Optoelectronic Engineering at Jinan University has elucidated for the first time the time-dependent quantum mechanism of two-photon absorption and proposed a two-photon absorption (fpTPA) optical nanoprinting technology based on few photon irradiation, successfully breaking through the bottleneck of traditional two-photon printing technology...

    03-06
    Ver tradução

  • Germany has developed direct laser welding technology to achieve adhesive free connection from fiber to chip

    Recently, researchers and their partners from the Fraunhofer Institute for Reliability and Microstructure (IZM) in Germany announced the successful development of a laser welding technology that can efficiently fix optical fibers onto photonic integrated circuits (PICs) without the need for adhesive bonding.This technology is developed in response to biophoton sensing technology, mainly utilizing ...

    2023-08-22
    Ver tradução

  • NASA's laser reflector instrument helps to accurately locate Earth measurements

    The most famous use of GPS satellites is to help people understand their location, whether it is driving cars, ships or planes, or hiking in remote areas. Another important but little-known use is to distribute information to other Earth observation satellites to help them accurately locate measurements of our planet.NASA and several other federal agencies, including the US Space Force, the US Spa...

    2023-12-12
    Ver tradução