chanelink logo
CHANELINK
Português

Enhanced laser heterodyne spectroscopy contributes to the measurement of atmospheric greenhouse gases

799
2023-10-25 15:48:05
Ver tradução

The research team led by Professor Gao Xiaoming of the Chinese Academy of Sciences Hefei Institute of Physical Sciences has improved the measurement accuracy of atmospheric greenhouse gases by using erbium-doped fiber amplifier assisted laser heterodyne radiometer.

The study was published in the Journal of Optics and was selected as an editor's selection.

LHR is renowned for its high sensitivity and spectral resolution, and has become the next generation of lightweight satellite payloads. However, during the scanning process, signals measured by heterodyne radiometers often encounter issues such as reduced baseline slope and signal-to-noise ratio, which can affect measurement accuracy.

In this study, researchers developed a near-infrared laser heterodyne spectroscopy detection scheme based on EDFA.
By adjusting the EDFA for automatic power control, researchers successfully amplified and stabilized the power of the local oscillator DFB laser, thereby significantly reducing baseline fluctuations. This optimization significantly improves the accuracy of the processed atmospheric transmission spectrum.

By using EDFA with automatic power locking function, the LHR can be operated in a state dominated by shot noise during scanning. By eliminating errors caused by baseline slope, EDFA assisted LHR significantly improves its performance.

"This optimization enables LHR to operate in a state dominated by shot noise during the scanning process, "said team member Dr. Li Jun.

In the experimental measurement of atmospheric CO, EDFA assisted LHR was used for the transmission spectrum, and the signal-to-noise ratio of the heterodyne signal was increased by three times.

"These results demonstrate the effectiveness of EDFA assisted LHR in achieving higher accuracy and precision in atmospheric gas measurement, "Dr. Li said.

The team stated that this discovery can improve ground level LHR remote sensing and enhance greenhouse gas knowledge and monitoring.

Recomendações relacionadas

  • Sivers will develop laser arrays for artificial intelligence and deliver prototypes in 2024

    Sivers Optics, a subsidiary of Sivers Semiconductors, has signed a product development agreement with an undisclosed company.Starting from the initial contract worth $1.3 million, the prototype will be delivered in 2024, and it is expected that the agreement will grow rapidly in 2025 before transitioning to mass production. After entering full production, customers expect the annual chip productio...

    2024-03-18
    Ver tradução

  • Progress in Theoretical Research on the Mechanism of Liquid Terahertz Wave Generation by Precision Measurement Institute

    Terahertz waves have significant application value in communication and imaging. The nonlinear interaction between strong field ultrafast laser and matter is one of the important ways to generate terahertz waves. The experimental and theoretical research related to terahertz generation media such as plasma, gas, and crystal is relatively sufficient. However, liquid water is a strong absorbing medi...

    2024-03-22
    Ver tradução

  • Laser Photonics cleaning technology simplifies the removal of biofilms in industrial environments

    Laser Photonics Corporation is a leading global industrial developer of CleanTech laser systems for laser cleaning and other material applications, highlighting a key application of its CleanTech laser system.Wayne Tupuola, CEO of Laser Photonics, commented, "Our CleanTech laser cleaning system provides an efficient and cost-effective method for removing biofilms from various materials and surface...

    2023-09-20
    Ver tradução

  • Trumpf laser uses artificial intelligence technology to improve welding quality

    At last month’s LASER World of Photonics exhibition in Munich, Germany, industrial solutions and laser giant Trumpf presented a new materials processing laser system solution specified to improve welding processes.The system combines several sensors that monitor all process steps during laser welding. An integrated AI quality control system checks the weld seams, for example, and OCT (optical cohe...

    07-11
    Ver tradução

  • ELI and LLNL strengthen transatlantic large-scale laser cooperation

    Lawrence Livermore National Laboratory (LLNL) and the Extreme Light Infrastructure (ELI) European Research Infrastructure Consortium (ERIC) have announced that they have signed a new Memorandum of Understanding. This builds on their existing decade of strategic collaboration to advance high-power laser technology.“We are looking forward to expanding our existing collaborations with ELI on areas su...

    07-09
    Ver tradução