Compact all-fiber add-drop-multiplexer using fiber Bragg gratings

Tunable erbium doped fiber ring laser using fiber Bragg grating-assisted add-drop filter

“…1a, it is easily to know that: the coupling efficiency can effect the threshold of the proposed laser; the bandwidth at FWHM can effect the mode-competition in the ring cavity; there is no need to use an OI in the ring cavity if the return loss is big enough to make sure that most of the light power transmitted in the ring cavity all follows the same direction. We believe that a better lasing output of proposed laser can be obtained, if the FBG-A-ADF used in the proposed laser are optimized with good performance in return loss, coupling efficiency and bandwidth at FWHM [15]. The author and his co-workers are working on fabricating FBG-A-ADFs with good performance at present.…”

A performance study of a nonlinear all Fibre Michelson interferometer, add-drop multiplexer, based in Fibre Bragg grating mirrors

“…The Add-Drop Multiplexer (ADM) is one of the key components for dense wavelengthdivision multiplexing (DWDM) systems (Murakami 2005;Kobayashi et al 2007;Baumann et al 1996). In the emerging next-generation transport networks, called intelligent optical networks, WDM-based optical components such as add-drop multiplexers (ADMs) and optical cross-connects (OXCs) will have full knowledge of the wavelengths in the network, status, and traffic-carrying capacity of each wavelength (Ilyas and Mouftah 2003).…”

Characteristics of a Grating-Folded Optical Directional Coupler

“…For practical use, a fiber Bragg grating can be combined with two optical circulators [5]. Grating-folded directional couplers have also been demonstrated in semiconductor waveguides [6], single-mode optical fibers [7,8], and silica waveguides [9,10]. They have the advantages of smaller size and greater fabrication tolerance and are potentially cheaper to fabricate than MZ structures or fibergrating/circulator combinations.…”