Explore 26 top manufacturers and suppliers of Distributed Feedback Lasers in our comprehensive photonics buyers' guide. A distributed feedback (DFB) laser is a laser where the optical resonator is formed not by discrete mirrors at the ends (as in Fabry–Pérot laser diodes) but by a periodic variation of the refractive index or gain (a Bragg grating) distributed throughout the active medium. Their key features relative to other semiconductor lasers are their single longitudinal mode (single frequency) emission profile, their high stability and their wavelength tunability. The frequency-selective element – a Bragg grating – is integrated into the chip itself and ensures continuous single-frequency operation.
