English

A new type of all-optical intelligent spectrometer

115
2024-07-22 11:54:26
See translation

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

Related Recommendations
  • Researchers improve laser behavior by tying laser knots

    Researchers have created a new type of laser that, despite environmental noise and manufacturing defects, still performs as expected. Technically speaking, researchers have created a topology, time, and mode-locked laser. This study has the potential to improve sensors and computing hardware.A mode-locked laser emits light with regular pulses instead of a continuous beam. Pulses can be very counta...

    2024-03-07
    See translation
  • AWOL Vision will showcase cutting-edge laser projectors and award-winning innovations at CEDIA 2023

    AWOL Vision has announced that it will be showcasing the latest innovations in home entertainment at this year's CEDIA Expo in Denver, Colorado from September 7-9.At the show, AWOL Vision will debut the new LVV-3000 Pro and LVV-3500 Pro laser projectors with Dolby Vision and Control4 integration, and will showcase the latest Vanish TV, The TV recently received the prestigious "IFA 2023 Best of the...

    2023-09-08
    See translation
  • Export of Pentium Laser Automation Production Line to Japan

    Recently, several large trucks from the Wenzhou factory of Pentium Laser were lined up and ready to go. The high-power and high-speed laser cutting automation production line developed and produced by Pentium Laser has been strictly inspected and accepted by Japanese customers for 15 days and 24 hours of uninterrupted operation. Today, it was loaded and sent to Japan. This laser cutting automati...

    2024-12-06
    See translation
  • A new type of electrically driven organic semiconductor laser can be used in the fields of spectroscopy, metrology, and sensing

    According to a report from Maims Consulting, scientists at the University of St. Andrews in the UK recently stated that they have made a "significant breakthrough" in the decades of challenges in developing compact organic semiconductor laser technology.Firstly, an OLED with a world record light output was manufactured, and then integrated with a polymer laser structure. This new type of las...

    2023-10-07
    See translation
  • IoTech shapes the flexible future of 3D printed electronic products

    The rapidly developing IoTech enterprise headquartered in Israel will showcase at LOPEC 2024 how its disruptive digital manufacturing continuous laser assisted deposition technology shapes the future of microelectronics and additive manufacturing.Herv é Javice, co-founder and CEO of ioTech, commented, "We are delighted to be attending the LOPEC exhibition for the first time and showcasing ...

    2024-02-27
    See translation