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  2. 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 ...

  3. 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. VCSELs are also single frequency devices. [1]

  4. Thin-film bulk acoustic resonator - Wikipedia

    en.wikipedia.org/wiki/Thin-film_bulk_acoustic...

    In an SMR structure acoustic mirror(s) providing an acoustic isolation is constructed between the resonator and the surrounding like the substrate. The acoustic mirror (such as a Bragg reflector) typically consists of an odd total number of materials with alternating layers of high and low acoustic impedance materials. The thickness of the ...

  5. Dielectric mirror - Wikipedia

    en.wikipedia.org/wiki/Dielectric_mirror

    An infrared dielectric mirror in a mirror mount. A dielectric mirror, also known as a Bragg mirror, is a type of mirror composed of multiple thin layers of dielectric material, typically deposited on a substrate of glass or some other optical material.

  6. 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 .

  7. The best Dutch ovens of 2025, tested by AOL

    www.aol.com/lifestyle/best-dutch-ovens-190855583...

    There are a wide range of Dutch ovens out there today, and they vary in size, material, and price. To help you find the best option to add to your kitchen, we spent months testing a total of 10 ...

  8. Brad Pitt is not messaging fans for money, rep warns after ...

    www.aol.com/brad-pitt-not-messaging-fans...

    Brad Pitt fans are being warned about scammers after a French woman purportedly lost $850,000 — and her marriage — after falling prey to AI images and fake messages impersonating the actor ...

  9. AOL reviewed: Storyworth is the perfect gift for someone who ...

    www.aol.com/lifestyle/storyworth-review...

    What I liked about Storyworth. There’s a lot to like about Storyworth, assuming you either choose to answer the questions yourself or choose to pepper a willing participant.