Novel full-cycle-coupler-based optical add-drop multiplexer and performance characteristics at 40-Gb/s WDM networks

Abstract

Abstract-A novel configuration of an interferometric device, based on a full-cycle full (100%) coupler structure, loaded with a Bragg grating symmetrically placed into the uniform coupler waist, is proposed for use as an optical add-drop multiplexer (OADM) with simultaneously optimized add and drop actions. A general method for designing a suitable Bragg grating for optimal inscription in to the uniform coupler waist is also proposed for use in to the device design and development. The performance of the device is characterized at 40-Gb/s wavelength-division-multiplexing (WDM) networks using theoretical systems simulations and is compared directly with other alternative OADM architectures.

Computational intelligence in photonics technology and optical networks: A survey and future perspectives

“…Optical couplers or simply optical waveguides can greatly enhance their functionality if they are combined with wavelength selective elements like Bragg Gratings (BG), leading thus to key devices for WDM such as Optical Add/Drop Multiplexers (OADMs) [98,99], dispersionless bandpass filters, dispersion compensators and narrow linewidth lasers [35]. Bragg Grating is essentially a periodic structure (of sub-micrometer scale periodicity) that is usually inscripted on top of waveguiding structures in fiber or in integrated planar form.…”

“…BGs are formed by a large number of periodic reflective planes (in sub-micrometer distance), and acts as wavelength selective reflector that does not allow transmission of a specific wavelength, which is essentially a onedimensional photonic band gap (PBG). Bragg gratings have been designed by approximate analytical model or simple heuristics [98,99] and for the case of more complex BGs efficient inverse scattering methods [35] have been used. The synthesis problem targets mainly the design of the strength of each of those reflective planes (apodization profile) and the insertion of proper phase shifts between those planes.…”

The Effects of Various Apodization Functions on the Filtering Characteristics of the Grating-Assisted SOI Strip Waveguides

“…Bragg gratings are used in many integrated optical components for a large variety of applications including optical signal processing, high-speed optical communications, sensing systems and networking [1][2][3][4]. Examples of prevalent grating-based components are add/drop filters for wavelength-division-multiplexing (WDM) communication systems, grating-assisted couplers, dispersion compensators, distributed-feedback and distributed-Bragg-reflector lasers [5][6][7][8].…”

“…Therefore, in the past decades, SOI waveguides have been attractive choices for integration with Bragg grating structures [8,10,11]. A main group of SOI structures are strip waveguides which are used in many applications, including WDM add/drop filters and grating couplers [4,12,13]. In strip waveguides, or photonic wires, usually submicron cross sections are used [9,10].…”

Numerical and experimental investigations of chirped-gratings-based Bragg-reflecting-coupler with multiple couple lengths

“…As the technological development and commercial drive from point-to-point transmission to complex WDM optical network, devices with the basic function of channel extraction-insertion have become critically important [1,2]. Recently, by inscribing Bragg grating directly into fiber coupler, all-fiber add/drop multiplexers combining the perfect wavelength selectivity of fiber Bragg grating (FBG) with the four-port characteristic of coupler have been proposed [3][4][5][6].…”