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, 780, 794, 797, 799, 801, 852, 940, 976, 1030, 1057, 1060, 1064, 1080, 1125, 1150, 1178, 1240, 1270, 1310, 1484,1510 ÷ 1580, 1650, 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

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)

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