chanelink logo
CHANELINK
English

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

997
2023-10-25 15:48:05
See translation

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.

Related Recommendations

  • Vast's Haven-1 program has become the world's first commercial space station equipped with SpaceX Starlink lasers

    Vast's Haven-1 program will become the world's first commercial space station, equipped with SpaceX's Starlink laser terminal, providing connections to its crew users, internal payload racks, external cameras, and instruments at speeds of gigabits per second and low latency.Max Haot, CEO of Vast, said: "If you need to provide high-speed, low latency, and continuous Internet connection on the orbit...

    2024-04-10
    See translation

  • Laser Wire Solutions and HumanTek Jointly Enter the Korean Laser Wire Stripping Market

    Recently, Laser Wire Solutions officially welcomed its important distribution partner in South Korea - HumanTek. This cooperation marks the official establishment of HumanTek as a branch of Laser Wire Solutions in Korea, and both parties will work together to provide excellent services for the Korean laser wire stripping market.HumanTek, with its deep foundation in the Korean market and strong pro...

    2024-07-03
    See translation

  • Europe builds an independent supply chain for Alexander laser crystals for space missions and atmospheric research

    Recently, companies from Lithuania, Italy, and Germany have reached a new milestone in the European independent space mission - based on the Galactic project, they have developed a supply chain for Alexandrite laser crystals in Europe to study changes in the atmosphere and Earth's surface.The high-power Alexander laser crystals and coatings developed in the GALACTIC project will be used to collect...

    2023-12-22
    See translation

  • A US research team has developed a new type of photonic memory computing device

    Recently, a research team from the University of California, Santa Barbara has successfully developed a new type of photonic memory computing device that integrates non reciprocal magneto-optical technology. This device achieves high-speed, high-energy efficiency, and ultra-high durability photon computing by utilizing the non reciprocal phase shift phenomenon. The research findings, titled "Integ...

    2024-10-24
    See translation

  • Ultra fast plasma for all optical switches and pulse lasers

    Plasmology plays a crucial role in advancing nanophotonics, as plasma structures exhibit a wide range of physical properties that benefit from local and enhanced light matter interactions. These characteristics are utilized in many applications, such as surface enhanced Raman scattering spectroscopy, sensors, and nanolasers.In addition to these applications, the ultrafast optical response of plasm...

    2024-03-26
    See translation