TECHGuru

  Distributed Feedback (DFB) Laser: Introduction A distributed feedback (DFB) laser unifies the laser longitudinal mode by using the Bragg reflection of a diffraction grating created along an active waveguide. It has a small line width and strong wavelength stability. The appropriate wavelength can be achieved by adjusting the pitch of the diffraction grating. The distributed feedback (DFB) laser market is typically used for optical communications over high capacity long distance and also for other range of applications such as fiber sensing, 3D sensing, gas sensing, and disease diagnosis such as respiratory and vascular monitoring The DFB laser eliminates the external grating that is required for conventional pump laser. Furthermore, it offers some benefits which include fiber length reduction, a decrease in the device's footprint, and lower power requirements. Rise in adoption of DFB laser for precise fiber optic communication and spectroscopy applications, owing to its provisio...