Long Period Grating
Long period grating couples light from a guided mode into forward propagating cladding modes where it is lost due to absorption and scattering. The coupling from the guided mode to cladding modes is wavelength dependent so we can obtain a spectrally selective loss. It is an optical fiber structure with the properties periodically varying along the fiber, such that the conditions for the interaction of several co-propagating modes are satisfied.

Features:
No reflection type
Low insertion loss

Applications:
Notch band filter
GFF for EDFA
Optical fiber sensing

Specifications

Parameters Unit Values Remark
Wavelength nm C+L  
Insertion Loss dB >8.5 +/-5nm @center wavelength
FWHM nm >15  
Termination -- Bare Fiber, FC/UPC Or FC/APC Customized
Fiber Type   SMF-28 Or Compatible  
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