A novel photonic analog-to-digital converter (ADC) based on asynchronous delta-sigma modulation technique (ADSM) has been investigated and demonstrated. The ADSM architecture utilizes photonic leaky integrators, inverted bistable quantizer and positive corrective feedback suitable for non-interferometric optical implementation. The principles of the proposed 2nd -order ADSM are modeled and simulated mathematically. A prototype fiber-optic ADSM is constructed, producing acceptable NRZ type binary output for frequencies in the MHz range. For an input of 2 MHz and sampling rate of 10.8 MHz, the prototype achieves SNR of 39.8 dB, SFDR of 21.2 dB and ENOB of 6 in the 5.4 MHz bandwidth of interest.


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    Titel :

    Asynchronous fiber-optic delta-sigma modulator


    Beteiligte:
    Reeves, E. (Autor:in) / Costanzo-Caso, P. (Autor:in) / Siahmakoun, A. (Autor:in)


    Erscheinungsdatum :

    2011-10-01


    Format / Umfang :

    699009 byte




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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