A technique based on the design of an optimized source of pico-second optical pulses, which exhibits excellent temporal and spectral purity, is presented. The procedure entails an initial complete intensity and chirp characterization of pulses, from an externally injected-gain switched laser (EI-GSL), using the technique of frequency resolved optical gating (FROG). This characterization yields the parameters that are required for the design of a non-linearly chirped fibre Bragg grating (NC FBG) with a chirp profile that is opposite to that measured across the pulse. By employing the tailor made NC FBG after the gain-switched laser, direct compression of the gain-switched pulses is achieved, to obtain pedestal-free, near transform-limited, 7 ps pulses. The system viability, characterized by simulations, portrays a 6 dB difference in performance between a pulse source with insufficient TPSR and one that exhibits adequate TPSR (/spl ges/ 30 dB).


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    Title :

    Optimized pulse source based on a gain-switched laser diode in conjunction with a non-linearly chirped grating for 40 Gbit/s systems


    Contributors:
    Kaszubowska, A. (author) / Clarke, A. (author) / Reid, D. (author) / Edvell, G. (author) / Roumieux, S. (author) / Anandarajah, P. (author) / Barry, L.P. (author) / Harvey, J.D. (author)


    Publication date :

    2004-01-01


    Size :

    154536 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English