ADVANCES IN ROADM TECHNOLOGIES AND …

ADVANCES IN ROADM TECHNOLOGIES AND SUBSYSTEMS September, 2010 2 | Page ABSTRACT Unti l recentl y, reconfigurable opti cal add/drop multi plexer ( ROADM ) systems did not exist, their components were unselected, and their market was unclear. Today, every major system vendor has a ROADM offering, and a la rge number of component vendors have announced ROADM products based on a variety of TECHNOLOGIES , some more mature than others. We review the different opti cal component TECHNOLOGIES that have been developed for use in ROADM subsystems, and describe their principles of operation, designs, advanta ges, and challenges. The technology platforms that we cover include MEMS, li quid crystals (li quid crysta l devices (LCD) and li quid crysta l on sili con (LCoS) TECHNOLOGIES ), and monolit hic and hybrid pla nar li ghtwave circuit s (PLC) based on sili ca on sili con and polymer on sili con platforms.

Keywords: reconfigurable optical add/drop multiplexer, wavelength blocker, wavelength selective switch, optical cross-connect, MEMS, liquid crystal, planar lightwave circuit, silica, polymer, Telcordia qualification

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  Dorma, Technologies, Circuit, Advance, Planar, Advances in roadm technologies and, Lightwave, Planar lightwave circuit

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