Long Period Fiber Grating
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Ongoing, First published Aug 02, 2022
Long period fiber bragg grating (LPFG) is formed by the periodic refractive index modulation in the fiber axis, and its period is generally larger than 100µm. Its coupling mechanism is: the fundamental mode of the fiber core transmitted forward is coupled into the cladding mode of the forward transmission of several specific wavelengths, and the cladding mode is quickly lost, so the LPFG basically has no retroreflection, and in its transmission there are several absorption peaks at specific wavelengths in the spectrum.

Features Of long period fiber grating

No Reflection Type

Low Insertion Loss

Application Of long period grating
Notch Band Filter

GFF for EDFA

Optical Fiber Sensing
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https://www.atgrating.com/products/long-period-fbg.html
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