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1/f frequency noise effects on self-heterodyne linewidth measurements

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1 Author(s)
Mercer, Linden B. ; Lincoln Lab., MIT, Lexington, MA, USA

The effects of a 1/f frequency noise on self-heterodyne detection are described, and the results are applied to the problem of laser diode linewidth measurement. The self-heterodyne autocorrelation function and power spectrum are evaluated for both the white and the 1/ f components of the frequency noise. From numerical analysis, the power spectrum resulting from the 1/f frequency noise is shown to be approximately Gaussian, and an empirical expression is given for its linewidth. These results are applied to the problem of self-heterodyne linewidth measurements for coherent optical communications, and the amount of broadening due to 1/f frequency noise is predicted

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Lightwave Technology, Journal of  (Volume:9 ,  Issue: 4 )