Distributed Feedback Lasers

Good-quality long-distance optical transmission over fiber needs lasers which emit at a single wavelength. This is almost universally realized by putting a wavelength-dependent reflector into the

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Distributed Feedback Laser

The simple design of fibre lasers with reflectors spread in space along light propagation direction is represented by the so-called distributed feedback (DFB) and distributed Bragg reflector (DBR) lasers.

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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.

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