chanelink logo
CHANELINK
繁体中文

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

356
2023-10-25 15:48:05
查看翻譯

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.

相關推薦

  • NASA Completely Transforms Laser Communication and Space Weather Research

    NASA is a pioneer in space research, once again attracting the attention of the world with fascinating insights. In a recent press release, NASA announced plans to test revolutionary laser communication systems and study the interaction between Earth and space weather.A Great Leap in Space Communication: ILLUMA-TThe SpaceX 29 mission, scheduled for November 5th, will conduct research and technical...

    2023-10-23
    查看翻譯

  • 10.30 Shenzhen Munich South China Laser Exhibition awaits you

    The Munich South China Laser Exhibition is about to open!As a member exhibition of the South China International Intelligent Manufacturing, Advanced Electronics, and Laser Technology Expo (referred to as "LEAP Expo"), it will be held from October 30 to November 1, 2023 at the Shenzhen International Convention and Exhibition Center (Bao'an New Hall) in conjunction with the Munich South China Elect...

    2023-10-26
    查看翻譯

  • Scientists have created a full spectrum white light laser with bright spot, smooth and flat spectrum, and large pulse energy characteristics

    Recently, the team led by Professor Li Zhiyuan from South China University of Technology has successfully developed a full spectrum white light laser, which has the characteristics of bright spot, smooth and flat spectrum, and large pulse energy. It can cover the ultraviolet visible infrared full spectrum of 300-5000nm, with a single pulse energy of 0.54mJ.The launch of such a full spectrum white ...

    2023-11-07
    查看翻譯

  • LPKF 2024 H1 revenue up 15% year-on-year

    Recently, LPKF Laser, a leading supplier of innovative laser solutions in Germany, released its performance report for the first half of the 2024 fiscal year as of June 30, demonstrating the company's steady performance and forward-looking layout in a complex market environment. According to the financial report, LPKF Laser&Electronics SE achieved significant growth in comprehensive revenue ...

    2024-07-31
    查看翻譯

  • Youil Energy Tech suffered a loss of up to 65%

    In recent years, the secondary battery equipment sector in South Korea has been hit by a wave of disruption, with demand temporarily stagnant and stock prices struggling to gain support. Especially for Youil Energy Tech, a manufacturer of secondary battery equipment, as the company is a latecomer to the laser equipment market, its sales cost burden is relatively high. It is expected that in the fu...

    04-12
    查看翻譯