• DFB Laser diode
    DFB Laser diode
    In the optical fiber communication network, the most commonly used laser is the distributed feedback (DFB) laser, which is a single longitudinal mode or single frequency semiconductor laser. The single frequency laser refers to a laser with only one longitudinal mode (spectral line) spectrum characteristic of the semiconductor laser. It can work in the third generation optical ...
    2022-06-06
  • Exploration of Near Infrared Imaging Window
    Exploration of Near Infrared Imaging Window
    Fluorescence imaging has been widely used in biomedical imaging and clinical intraoperative navigation. When fluorescence propagates in biological media, absorption attenuation and scattering disturbance will cause fluorescence energy loss and signal-to-noise ratio decrease, respectively. Generally speaking, the degree of absorption loss determines whether we can "see", and the...
    2022-05-30
  • What are the core components of the optical module
    What are the core components of the optical module
    As an important part of optical fiber communication system, optical module plays the role of photoelectric conversion. This article will introduce the core devices of the optical module.
    2022-05-24
  • How does the fiber amplifier work?
    How does the fiber amplifier work?
    When the transmission interval is too long (more than 100 km), the optical signal will have a great loss. In the past, people generally used optical repeaters to expand the optical signal. This kind of equipment has certain limitations in practical use, and it has been gradually Instead of optical fiber amplifiers, the working principle of optical fiber amplifiers is shown in t...
    2022-05-23
  • VCSEL laser diode advantages and classification.
    VCSEL laser diode advantages and classification.
    The full name of VCESL is a vertical cavity surface emitting laser, which is a semiconductor laser structure in which an optical resonant cavity is formed in the direction perpendicular to the semiconductor epitaxial wafer and the laser beam emitted is perpendicular to the surface of the substrate. Compared with LEDs and edge-emitting lasers EEL, VCSELs are superior in terms of...
    2022-05-19
  • Laser distance measuring
    Laser distance measuring
    Laser distance measuring is measured using a laser as a light source.It is divided into continuous laser and pulse laser according to the mode of laser operation.Gas lasers like helium-neon, argon ion, krypton cadmium and so on work in a continuous output state for phase laser ranging, dual heterogeneous GaAs semiconductor laser for infrared ranging; solid laser such as ruby, n...
    2022-05-16
  • Semiconductor laser applications
    Semiconductor laser applications
    Semiconductor lasers are a type of lasers that mature earlier and are developing rapidly. Because of its wide wavelength range, simple manufacture, low cost, easy mass production, and because of its small size, light weight, and long life, its variety develops quickly and its application The range is wide, and there are currently more than 300 species.
    2022-05-09
  • VCSEL laser diode advantages and classification.
    VCSEL laser diode advantages and classification.
    The full name of VCESL is a vertical cavity surface emitting laser, which is a semiconductor laser structure in which an optical resonant cavity is formed in the direction perpendicular to the semiconductor epitaxial wafer and the laser beam emitted is perpendicular to the surface of the substrate. Compared with LEDs and edge-emitting lasers EEL, VCSELs are superior in terms of...
    2022-05-05
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