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, 809, 830, 852, 895, 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)

 

Application of our  π-Phase-Shifted FBG products in articles

 Single-frequency, linearly polarised fibre laser with spectrally asymmetric fibre Bragg grating mirrors

Publication: Quantum Electronics, 2019, Autors: Mikhail Ivanovich Belovolov, Vladimir Mikhailovich Paramonov, Oleg Igorevich Medvedkov, Mikhail Mikhailovich Belovolov

 Single-frequency fibre laser with a cavity formed by Bragg gratings written in the core of an active composite fibre using KrF laser radiation (248 nm)

Publication: Quantum Electronics, 2019, Autors: Ol'ga Nikolaevna Egorova, Oleg Igorevich Medvedkov, Evgenii Sergeevich Seregin, Sergei Alexandrovich Vasil’ev, Sergei Evgen'evich Sverchkov, Boris Ivanovich Galagan, Boris Il'ich Denker, Georgii L'vovich Danielyan, Vladimir Ivanovich Pustovoi, SL Semjonov

 Fabrication and investigation of active composite fibers with phosphate core and silica cladding

Publication: Fiber Lasers XIII: Technology, Systems, and Applications, 2016, Autors: SL Semjonov, ON Egorova, OI Medvedkov, MS Astapovich, AG Okrimchuk, EM Dianov, BI Denker, BI Galagan, SE Sverchkov