chanelink logo
CHANELINK
English

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

903
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

  • FABULOUS provides certified food safety 3D printing materials to the United States

    As is well known, 3D printing is becoming increasingly popular and expanding its application areas to different fields. Additive manufacturing has been established in the aerospace, automotive, and medical industries and is now being used in the production of consumer goods and luxury goods, construction, and food industries. On the one hand, this mainly involves innovative edible products from 3D...

    2024-05-27
    See translation

  • Invest 13 million euros! Tongkuai opens its Southeast European headquarters in Hungary

    Recently, German company Tongkuai invested 13 million euros to open its headquarters in Southeast Europe in Hungary and jointly established a digital network demonstration factory in the Gothler Business Park. Its business focuses on machine tools for digital manufacturing and laser sales for batteries and other automotive components.Nicola Leibinger Kamm ü ller, CEO of Tongkuai, said, "It is...

    2023-09-16
    See translation

  • Researchers have developed a quantum cascade laser in Italy

    The first all-Italian quantum cascade laser was born at the National Research Center in Pisa. The protagonists of this milestone are two researchers from the Nanoscience Institute, Lucia Sorba and Miriam Serena Vitiello, who together with their research team designed and developed this innovative device.In fact, quantum cascade lasers have unique potential for detecting gases and other molecules, ...

    2023-08-04
    See translation

  • 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
    See translation

  • Nuts: Adhere to embrace three-color laser technology, Krypton three-color laser optical machine to solve the speckle phenomenon

    Nuts is once again making waves in the home projection market with the launch of a new home projection product, Nuts N1 Air tri-color laser projector at a historically low price.In the increasingly "volume" home projection market, unswervingly layout of three-color laser nuts, breaking out of their own world.Laser projection permeability increases, nut is on topIn the first half of 2023, the home ...

    2023-09-05
    See translation