Français

A new type of all-optical intelligent spectrometer

491
2024-07-22 11:54:26
Voir la traduction

Recently, Professor Xu Tingfa's research team from the School of Optoelectronics at Beijing Institute of Technology and Assistant Professor Lin Xing's team from Tsinghua University jointly developed a new type of Opto Intelligence Spectrometer (OIS). The device is based on diffractive neural network technology and achieves precise spectral reconstruction under spatially coherent or spatially incoherent light sources, with significant advantages of low energy consumption and light speed processing. The relevant achievements have been published under the title "Opto intelligence Spectrometer Using Diffractive Neural Networks" in the top international optical journal "Nanophotonics" (China University of Science and Technology, Class 1, Top Journal).

Nanophotonics, published by Walter de Gruyter in Germany, focuses on exploring cutting-edge advances in the interaction between light and matter, as well as their fundamental principles and applications. The first authors of this paper are Wang Ze, a master's student at Beijing Institute of Technology, and Chen Hang, a postdoctoral fellow at Tsinghua University. The corresponding authors are Associate Researcher Li Jianan, Professor Xu Tingfa, and Assistant Professor Lin Xing.

The newly developed all optical intelligent spectrometer (OIS) converts the spectral amplitude of the input light source into the detection intensity on the output plane, and uses multiple detectors to accurately perceive the intensity of different spectral bands. By establishing a mapping relationship between input and output and optimizing the phase distribution of the modulation layer using two mean square error (MSE) loss functions, high contrast output intensity distribution and accurate reconstruction of the input light source spectrum were achieved. The principle is shown in Figure 1.

Figure 1. Architecture of all-optical intelligent spectrometer based on diffractive neural network.

The experimental results show that OIS exhibits excellent spectral reconstruction capability under both spatially coherent and spatially incoherent light sources (see Figure 2). In addition, the application testing of the device on the real-world dataset CAVE shows that it has good generalization ability and practical application potential (see Figure 3).

Figure 2. OIS spectral reconstruction results with a spectral resolution of 10nm. Left image: Randomly generated spectral amplitude distribution and spectral reconstruction results. Right figure: Intensity distribution of the output plane.

Figure 3. Spectral reconstruction results of OIS on the real-world dataset CAVE, with a spectral resolution of 10nm.
This study has overcome the long-standing challenges of traditional spectral reconstruction architectures, such as bulky optical components, complex electronic reconstruction algorithms, and limited flexibility. It can serve as a basic unit for array layout, laying the foundation for full light speed and high-quality spectral imaging.

Source: Beijing Institute of Technology

Recommandations associées
  • Mycronic receives first order after upgrading solid-state lasers

    Recently, Mycronic AB received its first order from SK Electronics in Japan to upgrade the installed display mask writer from a gas laser to a solid-state laser. The upgrade is scheduled to be delivered within the next two years.Image source: MycronicIt is reported that Mycronic's "Pattern Generators" department provides mask writers for display manufacturing and semiconductor production. So far, ...

    2023-10-16
    Voir la traduction
  • The wide application of laser plastic welding technology in the field of automobile manufacturing

    With the rapid development of society, people's demands for energy conservation, emission reduction, and safety in automobiles are increasing. Automobile manufacturers are seeking lightweight manufacturing processes for automobiles, changing traditional component packaging processes, and so on. Laser plastic welding technology has emerged, and below is a brief sharing of the application of plastic...

    2024-09-26
    Voir la traduction
  • Shanghai Photonics Corporation has made progress in laser welding of structural materials (Ni-28W-6Cr alloy) for new-generation molten salt reactors

    Recently, Yang Shanglu, a researcher at the Laser Intelligent Manufacturing Technology Research and Development Center of Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, has made new progress in laser welding of the fourth-generation reactor-molten salt reactor structural material Ni-28W-6Cr nickel-based superalloy.The research team applied the high power fiber ...

    2023-08-25
    Voir la traduction
  • NASA will demonstrate laser communications from the space station

    NASA's ILLUMA-T payload communicates with the LCRD via laser signals.NASA uses the International Space Station, a spacecraft the size of a football field orbiting the Earth, to learn more about living and working in space. For more than 20 years, the space station has provided a unique platform for investigation and research in the fields of biology, technology, agriculture and more. It is home to...

    2023-09-02
    Voir la traduction
  • Han's Laser senior management resigns

    Just now, Han's Laser Technology Industry Group Co., Ltd. announced the resignation of senior management personnel. The board of directors recently received a written resignation report from Mr. Zhao Guanghui, the deputy director of the company's management and decision-making committee. Mr. Zhao Guanghui has applied to resign from his position as deputy director of the company's management and de...

    06-09
    Voir la traduction