The filtering scheme proposed here is based on transmission through a dual long-period-fiber-grating (LPFG) configuration and enables implementation of arbitrary spectral transfer functions using available inverse-scattering design algorithms, such as those widely used for fiber Bragg gratings (FBGs) operating in reflection. Besides the important technical advantage of operation in transmission, the proposed device can reach large spectral bandwidths that would be extremely challenging to reach by, e.g., FBG devices. The proposed concept is demonstrated by designing and fabricating a LPFG-based filter for synthesis of transform-limited -long square-like pulses.
© 2009 Optical Society of AmericaFull Article | PDF Article
Stefano Longhi, Marcello Marano, Paolo Laporta, Orazio Svelto, and Michele Belmonte
J. Opt. Soc. Am. B 19(11) 2742-2757 (2002)
Young-Geun Han, Sang Hyuck Kim, and Sang Bae Lee
Opt. Express 12(9) 1902-1907 (2004)
Y. Park, M. Kulishov, R. Slavík, and J. Azaña
Opt. Express 14(26) 12670-12678 (2006)