Advances on Polymer Optical Fiber Gratings Using a KrF Pulsed Laser System Operating at 248 nm - Invited Review
; LEAL-JUNIOR, A.
Domingues, M. F.
; Leitão, C. Leitão
; Ortega, B.
Fibers Vol. 6, Nº 1, pp. 1 - 13, March, 2018.
ISSN (print): 2079-6439
Scimago Journal Ranking: 0,40 (in 2018)
Digital Object Identifier: 10.3390/fib6010012
This paper presents the achievements and progress made on the polymer optical fiber
(POF) gratings inscription in different types of Fiber Bragg Gratings (FBGs) and long period gratings (LPGs). Since the first demonstration of POFBGs in 1999, significant progress has been made where
the inscription times that were higher than 1h have been reduced to 15 ns with the application of the krypton fluoride (KrF) pulsed laser operating at 248 nm and thermal treatments such as the
pre-annealing of fibers. In addition, the application of dopants such as benzyl dimethyl ketal (BDK) has provided a significant decrease of the fiber inscription time. Furthermore, such improvements lead to the possibility of inscribing POF gratings in 850 nm and 600 nm, instead of only the 1550 nm region. The progress on the inscription of different types of polymer optical fiber Bragg gratings (POFBGs) such as chirped POFBGs and phase-shifted POFBGs are also reported in this review.