Journal article Open Access

Experimental Assessment of Filter Narrowing Effect for Low Bandwidth Connections in EON

Martín, Laura; Fàbrega, Josep M.; Svaluto Moreolo, Michela; Vílchez, F.J.; Nadal, Laia


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    <subfield code="a">Filter narrowing effect</subfield>
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    <subfield code="a">direct detection (DD)</subfield>
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    <subfield code="a">orthogonal frequency division multiplexing (OFDM)</subfield>
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    <subfield code="a">intensity modulation (IM)</subfield>
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    <subfield code="a">Grant numbers : This work was supported in part by the Spanish Ministry MINECO Project DESTELLO under Grant TEC2015-69256-R.© 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.</subfield>
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    <subfield code="a">Experimental Assessment of Filter Narrowing Effect for Low Bandwidth Connections in EON</subfield>
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    <subfield code="a">&lt;p&gt;In this letter, we experimentally analyze the filter narrowing effect for low bandwidth connections in the context of the flexi-grid paradigm for optical aggregation networks. First of all, we characterize the concatenation of up to 12 filters by means of a high resolution optical spectral analyzer. Then, we set up the programmable filters with the obtained characterization, in order to emulate the filter concatenation impairments. The studied filters have nominal bandwidths of 12.5 GHz, 25 GHz, and 50 GHz. The two potential candidates analyzed are intensity modulation/direct detection on-off keying and direct detection orthogonal frequency division multiplexing (OFDM) with uniform and bit loading. Results show a significant signal degradation for filter bandwidths of 12.5 GHz with respect to 25 GHz and 50 GHz, considering a net bit rate of 10 Gb/s. We also conclude that for future entire flexi-paradigm, OFDM is an appropriate candidate.&lt;/p&gt;</subfield>
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