Inphenix

The Distributed Feedback Laser, also known as the DFB laser diode, is a type of laser widely used for high-capacity long-distance transmission. Fiber-optic sensing, laser radar, fiber optical communication, barcode readers, disc reading, and laser scanning are just a few of the major applications of DFB lasers. What Is a DFB Laser? According to Wikipedia, a Distributed Feedback Laser is a type of laser diode in which the active region contains a periodically structured diffraction grating element. In layman’s terms, a DFB laser is a laser with a diffraction grating above the active region that acts as a Bragg reflector. Besides that, the distributed feedback laser is less susceptible to temperature variations and has a faster modulation speed. Also, in a distributed feedback (DFB) laser, the grating and reflection are often continuous along the cavity and not just at the ends of mirrors. This will eventually change the laser’s modal behavior and make it more stable. The key characteri...

The Fabry Perot– FP laser , also known as the Fabry Perot Interferometer (FPI), is a type of laser that is widely used in the telecommunications industry, astronomy, and other fields. This laser’s primary application is for low-data-rate short-distance transmission over distances of up to 20 kilometers. It should be noted that the FP laser is a more advanced version or substitute for the DFB (Distributed Feedback) laser. The spectrum width is the fundamental distinction between DFB and Fabry Perot lasers. On the one hand, the Fabry Perot laser has a wide spectrum width and is a multi-longitudinal mode laser, whereas the DFB laser has a narrow spectrum width and is a single longitudinal mode laser. To know the working of FP laser, Check our blog .