Application of WDM holographic devices in access and metro networks |
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Authors: | Alfredo Martín Minguez Paloma R Horche |
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Institution: | (1) Departamento de Tecnología Fotónica, Universidad Politécnica de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain |
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Abstract: | In this paper, a design of a generic multipurpose device is described. It can operate, in its basic structure, as a tunable
wavelength filter, wavelength multiplexer or λ router; by using a more complex structure, the device works as an optical add
drop multiplexer (OADM) or/and optical switch (OS). It can be used in both coarse and dense wavelength division multiplexing
technology (CWDM/DWDM) according to the network application. Performance parameters of the device, like switching time, losses,
crosstalk or polarization insensitivity are analyzed and compared with other switching technologies. Some applications of
the holographic WDM multifunction device in METRO networks are described, such as the utilization of OADMs in optical path
protection/reconfiguration between nodes (1 + 1 configuration) and the use of optical switches to interconnect nodes of the
METRO–access network with the METRO-Core or long haul networks in a reconfigurable topology. Other applications in Access
networks are possible, like the use of the OADMs in optical path protection between the optical line termination (OLT) at
the central office (CO) and the remote node (RN) in a fiber to the office passive-optical network (FTTO-PON) or, in some specific
cases, the utilization as tuneable holographic filters in a FTTO application, at the Business ONT (BONT), to select the assigned
optical wavelength according to the services provided to the customer. |
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Keywords: | Access and metro networks Holographic device OADM Optical filter Optical router Optical switch |
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