title: Dense WDM transmission at 2  μm enabled by an arrayed waveguide grating.
abstract: We show, for the first time, dense WDM (8×20  Gbit/s) transmission at 2 μm enabled by advanced modulation formats (4-ASK Fast-OFDM) and the development of key components, including a new arrayed waveguide grating (AWGr) at 2 μm. The AWGr shows -12.8±1.78  dB of excess loss with an 18-dB extinction ratio and a thermal tunability of 0.108 nm/°C.
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authors.lastname: Zhang
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authors.lastname: Gleeson
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authors.lastname: Ye
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authors.lastname: Pavarelli
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authors.lastname: Ouyang
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authors.lastname: Zhao
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authors.lastname: Kavanagh
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authors.lastname: Thomas
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authors.lastname: Gocalinska
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authors.lastname: Chen
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authors.lastname: Bradley
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authors.lastname: Hayes
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authors.lastname: Numkam Fokoua
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authors.lastname: Li
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authors.lastname: Kelly
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authors.lastname: O'Carroll
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authors.lastname: Phelan
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authors.lastname: O'Brien
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authors.lastname: Peters
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authors.lastname: Corbett
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authors.lastname: Gunning