chanelink logo
CHANELINK
English

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

993
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

  • Vector Photonics accelerates the commercialization of PCSEL laser technology

    Recently, Vector Photonics, a well-known surface coupled laser technology supplier in the UK, announced that the company has received £ 3 million in financing (including £ 1.667 million in equity investment and £ 1.27 million in additional research funding, equivalent to approximately RMB 27.63 million) to help commercialize its surface coupled laser technology.(Image source: Vector Photonics)Vect...

    2024-07-04
    See translation

  • Phil Energy from South Korea wins mysterious order from European battery manufacturer

    Recently, Phil Energy, a South Korean secondary battery equipment manufacturer, successfully won an order from a European battery manufacturer to manufacture the next generation 46 series cylindrical battery manufacturing equipment. At present, both parties have signed a supply agreement for this cooperation, but have not disclosed the customer name and order size to the public. It is understood...

    2024-07-25
    See translation

  • Snapmaker Announces Its First Dedicated Laser Cutter, the Ray, in 20w and 40w Flavors

    Snapmaker has been making three-in-one manufacturing tools -- The Snapmaker, Snapmaker 2 and Artisan -- for over six years now. These machines have changeable tool heads that can be used for 3D printing, laser cutting and CNC machining. At the beginning of this year, it branched out to make adedicated 3D printer, the J1-- a dual print-head machine that works very well -- and today the ...

    2023-08-28
    See translation

  • New nanophotonic circuits demonstrate the potential of quantum networks

    The Purdue University team in the United States has captured alkali metal atoms (cesium) in integrated photonic circuits, which can serve as transistors for photons (the smallest energy unit of light). These captured atoms demonstrate for the first time the potential of cold atom integrated nanophotonic circuits to construct quantum networks. The research results were published in the latest issue...

    2024-08-14
    See translation

  • Coherent's first global manufacturing center in India will focus on the development, production and service of lasers, optical networking components and systems

    Coherent, a global laser giant, has signed a tripartite cooperation agreement (MoU) with the Indian Institute of Technology Madras Research Park (IIT MRP) and Guidance Tamil Nadu Investment Promotion Centre.Coherent will establish its first global Manufacturing Centre (CoE) for laser applications at IIT Madras Research Park, which will focus on R&D, production and services for lasers, optical ...

    2023-09-07
    See translation