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A distributed-feedback laser (DFB) is a type of laser diode, quantum-cascade laser or optical-fiber laser where the active region of the device contains a periodically structured element or diffraction grating. The structure builds a one-dimensional interference grating (Bragg scattering), and the grating provides optical feedback for the laser.
The company had a patented a Distributed Feedback Laser (DFB)-array technology, which enabled the manufacture of broadly tunable sources that have the same performance and reliability as fixed DFBs. Santur claimed to have set a new standard in the telecommunications industry with its technology that features a unique combination of high power ...
External cavity lasers using a MEMS structure for tuning the cavity length, such as devices commercialized by Iolon. External cavity lasers using multiple-prism grating arrangements for wide-range tunability. [9] DFB laser arrays based on several thermal tuned DFB lasers, in which coarse tuning is achieved by selecting the correct laser bar.
A distributed feedback (DFB) quantum cascade laser [25] is similar to a Fabry–Pérot laser, except for a distributed Bragg reflector (DBR) built on top of the waveguide to prevent it from emitting at other than the desired wavelength. This forces single mode operation of the laser, even at higher operating currents.
Based on the formula derived for the natural linewidth, [2] [6] [8] 15 experiments on measuring the natural linewidth in Fabry-Perot lasers [2] [6] and 15 experiments in DFB lasers [2] [9] have been simulated. The derived formula for line shape of radiation (of FP lasers [2] [6] [12] and DFB lasers [2] [7]) is distinguished from Lorentz line ...
A distributed Bragg reflector laser (DBR) is a type of single frequency laser diode. Other practical types of single frequency laser diodes include DFB lasers and external cavity diode lasers. A fourth type, the cleaved-coupled-cavity laser has not proven to be commercially viable.
The gain for the laser is provided by a length of rare earth doped optical fiber, with the most common form using Yb 3+ ions as the active lasing ion in the silica fiber. These Yb-doped fiber lasers first operated at the 1 kW CW power level in 2004 [ 32 ] based on free space cavities but were not shown to operate with fiber Bragg grating ...
Time-resolved simulation of a pulse reflecting from a Bragg mirror. A distributed Bragg reflector (DBR) is a reflector used in waveguides, such as optical fibers.It is a structure formed from multiple layers of alternating materials with different refractive index, or by periodic variation of some characteristic (such as height) of a dielectric waveguide, resulting in periodic variation in the ...