DFB Laser (Distributed Feedback Laser) - Inphenix Inc. https://www.inphenix.com/en/distributed-feedback-lasersdfbs/ Inphenix’s #DFBlaser has a simple and low-cost fabrication process and has many advantages, such as a very high side mode suppression ratio, stable operation over a broad temperature range, narrow linewidth and low sensitivity to optical feedback. #DistributedFeedbackLaser (DFB Laser) is an edge-emitting semiconductor light source. Compared to FP Lasers and DBR Lasers, DFB Lasers are much more stable and generate a clean single mode output. This is achieved by the inclusion of a diffraction grating along the active region of the chip.