π-Phase-Shifted FBG

 

ARTICLE GTL-FBG-PS-870

Fiber Bragg Gratings have many applications in optical communication, laser technique and sensing systems. The FBGs are widely used like in-fiber mirrors or optical filters with narrow band optical spectrum. FBGs can be used like a sensitive element for strain and temperature measuring.

Phase shifted FBGs have a very narrow peak within its transmission/reflection spectrum. Phase shifted FBG is a grating with phase defect in the center. While the grating length determines its bandwidth, spectral width of that peak depends on the strength both parts of FBG. Typical FWHM has a value 0.1nm – 0.005 nm. Phase shifted FBGs are used as narrow bandwidth optical filter, for single – frequency fiber lasers creations. The experimental and theoretical transmission spectrum of FBGs is presented in the graph.

 

FBG CHARACTERISTICS	ARTICLE GTL-FBG-PS-870	TOLERANCE/NOTE
Wavelength range, nm	600÷ 2300	± 0.1 ÷ ± 1 custom request
Types of fiber	Single-Mode, PM, Double clad, LMA	or custom
Wavelength to quick order, nm	633, 650, 852, 976, 1030, 1060, 1064, 1063 ÷ 1078, 1080, 1125, 1150, 1510 ÷ 1580, 1551, 1650, 1874 ÷ 1878, 1900, 1908, 1952, 2300	± 0.1 ÷ ± 1 custom request
Reflectivity, %	50 ÷ 99	2 ÷ 5 custom request
Bandwidth (WFHM), nm	0.1 ÷0.8	custom request
Bandwidth of central peak, pm	10 ÷ 100	custom request
SLSR, dB	‹ 8 ÷ 25	custom request
FBG Pigtail Length, m	≥ 0.5	or custom
FBG Recoating	None, Acrylate, Polyimide, Aluminium, Copper	or custom
Tensile Strength, kpsi	› 100
Optical Connector	Bare fiber, FC/APC, LC/APC	or custom

 π-Phase-Shifted FBG (Article GTL-FBG-PS-870)