中文版
ENGLISH
Long Period Fiber Grating (LPFG)
Description： Long Period Fiber Grating (LPFG) is formed by the periodic refractive index modulation in the fiber axis, and its period is generally larger than 100µm.
Introduction
Long Period Fiber Grating (LPFG)
Long Period Fiber 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.
Key Features
l No reflection type
l Low insertion loss
Applications
l Notch band filter
l GFF for EDFA
l Optical fiber sensing
Main parameters
Item | Unit | Specification |
Center Wavelength | nm | C+L |
Transmission Loss | % | >90 |
Bandwidth (FWHM) | nm | 1~3 |
Period | μm | 550 |
LPFG Length | mm | 20~30 |
Tensile Strength | kpsi | >100 |
Fiber Type | -- | Single-Mode |
Fiber Coating | -- | Acrylate |
Pigtail Length | m | Standard 1m both ends, or custom |
Optical Connector | -- | Bare Fiber, FC/APC, SC/APC, or custom |
Previous：Polarization Maintaining FBG
Next：Chirped FBG
