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2. Distributed Bragg reflector laser - Wikipedia

   en.wikipedia.org/wiki/Distributed_Bragg...

   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.

3. Distributed Bragg reflector - Wikipedia

   en.wikipedia.org/wiki/Distributed_Bragg_reflector

   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 ...

4. Fiber Bragg grating - Wikipedia

   en.wikipedia.org/wiki/Fiber_Bragg_grating

   A fiber Bragg grating (FBG) is a type of distributed Bragg reflector constructed in a short segment of optical fiber that reflects particular wavelengths of light and transmits all others. This is achieved by creating a periodic variation in the refractive index of the fiber core, which generates a wavelength-specific dielectric mirror .

5. Distributed-feedback laser - Wikipedia

   en.wikipedia.org/wiki/Distributed-feedback_laser

   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

6. Laser diode - Wikipedia

   en.wikipedia.org/wiki/Laser_diode

   A distributed Bragg reflector laser (DBR) is a type of single-frequency laser diode. [11] It is characterized by an optical cavity consisting of an electrically or optically pumped gain region between two mirrors to provide feedback. One of the mirrors is a broadband reflector and the other mirror is wavelength selective so that gain is favored ...

7. Semiconductor saturable-absorber mirror - Wikipedia

   en.wikipedia.org/wiki/Semiconductor_saturable...

   Semiconductor saturable absorbers were used for laser mode-locking as early as 1974 when p-type germanium was used to mode lock a CO 2 laser which generated pulses of around 500 picoseconds. Modern SESAMs are III-V semiconductor single quantum well (SQW) or multiple quantum wells grown on semiconductor distributed Bragg reflectors (DBRs).